--- title: "$68 Cheap Flights to Keystone, SD - Expedia" description: "Looking for cheap flights to Keystone? Many airlines offer no change fee on selected flights and book now to earn your airline miles on top of our rewards! Find great 2026 Keystone flight deals now!" canonical: "https://www.expedia.com/Cheap-Flights-To-Keystone.d8178.Travel-Guide-Flights" language: en-US market: US currency: USD prices_as_of: 2026-11-13T02:24:08Z --- # $68 Cheap Flights to Keystone, SD ![A large rock formation with a tunnel entrance.](https://images.trvl-media.com/place/8178/8ae5c322-87d8-461b-a387-6f9ad5d2ba3d.jpg?impolicy=fcrop&w=1200&h=500&q=medium) [View $68 flight on Wed, Jan 13, 2027](https://www.expedia.com/Flights-Search?leg1=from:AZA,to:RAP,departure:1/13/2027TANYT&trip=oneway&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:68.00&airProductToken=AQoqCigIx2gSAzY1MxigBiCReCiOtaIDMJu2ogM4SkAAWAFqAkRGcgRKTkVXEgwIARABGAEqAkc0MgAYASIECAEQASgCKAMoBDAN) ## Popular airlines to Keystone [American Airlines](https://www.expedia.com/Flights-Search?leg1=from:CMH,to:Keystone,%20South%20Dakota,%20United%20States%20of%20America,departure:11/27/2026TANYT&leg2=from:Keystone,%20South%20Dakota,%20United%20States%20of%20America,to:CMH,departure:12/4/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) [United](https://www.expedia.com/Flights-Search?leg1=from:CMH,to:Keystone,%20South%20Dakota,%20United%20States%20of%20America,departure:11/27/2026TANYT&leg2=from:Keystone,%20South%20Dakota,%20United%20States%20of%20America,to:CMH,departure:12/4/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) [Delta](https://www.expedia.com/Flights-Search?leg1=from:CMH,to:Keystone,%20South%20Dakota,%20United%20States%20of%20America,departure:11/27/2026TANYT&leg2=from:Keystone,%20South%20Dakota,%20United%20States%20of%20America,to:CMH,departure:12/4/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) [Allegiant Air](https://www.expedia.com/Flights-Search?leg1=from:CMH,to:Keystone,%20South%20Dakota,%20United%20States%20of%20America,departure:11/27/2026TANYT&leg2=from:Keystone,%20South%20Dakota,%20United%20States%20of%20America,to:CMH,departure:12/4/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"G4"}}]) [KLM](https://www.expedia.com/Flights-Search?leg1=from:CMH,to:Keystone,%20South%20Dakota,%20United%20States%20of%20America,departure:11/27/2026TANYT&leg2=from:Keystone,%20South%20Dakota,%20United%20States%20of%20America,to:CMH,departure:12/4/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"KL"}}]) [Virgin Atlantic](https://www.expedia.com/Flights-Search?leg1=from:CMH,to:Keystone,%20South%20Dakota,%20United%20States%20of%20America,departure:11/27/2026TANYT&leg2=from:Keystone,%20South%20Dakota,%20United%20States%20of%20America,to:CMH,departure:12/4/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"VS"}}]) [Air France](https://www.expedia.com/Flights-Search?leg1=from:CMH,to:Keystone,%20South%20Dakota,%20United%20States%20of%20America,departure:11/27/2026TANYT&leg2=from:Keystone,%20South%20Dakota,%20United%20States%20of%20America,to:CMH,departure:12/4/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AF"}}]) ### Be in the know Get alerts if flight prices drop or rise\* ### Book smarter Save up to 30% on select hotels after you book a flight\* ### Earn twice Earn your airline miles on top of our OneKeyCash [Learn about One Key](https://www.expedia.com/welcome-one-key) ## Expedia's flights to Keystone Prices were available within the past 7 days and start at $68 for one-way flights and $115 for roundtrip, for the period specified. Prices and availability are subject to change. All deals One way Roundtrip [Select United flight, departing Thu, Dec 3 from Columbus to Rapid City, returning Sat, Dec 5, priced at $359 Found 6 hours ago](https://www.expedia.com/Flights-Search?leg1=from:CMH,to:RAP,departure:12/3/2026TANYT&leg2=from:RAP,to:CMH,departure:12/5/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:358.40&airProductToken=AQpvCjUI1YIBEgMzMTQYgjsgrhwoveueAzCl7J4DOE5AAFgBagoxX2Jhc2ljZWNvcghMREEyUEZCTgo2CNWCARIENTI0ORiuHCCReCju7J4DMJrungM4TkAAWAFqCjFfYmFzaWNlY29yCExEQTJQRkJOCm8KNgjVggESBDU0MTQYkXggrhworP2eAzDG%5Fp4DOE5AAFgBagoxX2Jhc2ljZWNvcghMREEyUEZCTgo1CNWCARIDNTY1GK4cIII7KIP%5FngMw4P-eAzhOQABYAWoKMV9iYXNpY2Vjb3IITERBMlBGQk4SCggBEAEYASoCVUEYASIECAEQASgCKAMoBDAL) Thu, Dec 3 - Sat, Dec 5 · CMH · RAP · Roundtrip [Select American Airlines flight, departing Thu, Dec 3 from Columbus to Rapid City, returning Sat, Dec 5, priced at $359 Found 6 hours ago](https://www.expedia.com/Flights-Search?leg1=from:CMH,to:RAP,departure:12/3/2026TANYT&leg2=from:RAP,to:CMH,departure:12/5/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:358.40&airProductToken=AQpoCjIIwYIBEgQxMzU4GII7IKOxASjd5p4DMJ3ongM4QkAAWAFqBUJBU0lDcghRVkRaWk5CVgoyCMGCARIEMzk4NBijsQEgkXgo5OieAzD76Z4DOEJAAVgBagVCQVNJQ3IIUVZEWlpOQlYKZwoyCMGCARIEMzk4NBiReCCjsQEo2YCfAzDtgZ8DOEJAAFgBagVCQVNJQ3IIUVZEWlpOQlYKMQjBggESAzM5OBijsQEggjsovoOfAzDRhJ8DOEJAAVgBagVCQVNJQ3IIUVZEWlpOQlYSCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAL) Thu, Dec 3 - Sat, Dec 5 · CMH · RAP · Roundtrip [Select United flight, departing Thu, Dec 3 from Columbus to Rapid City, returning Sat, Dec 5, priced at $364 Found 6 hours ago](https://www.expedia.com/Flights-Search?leg1=from:CMH,to:RAP,departure:12/3/2026TANYT&leg2=from:RAP,to:CMH,departure:12/5/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:363.70&airProductToken=AQqnAQo2CNWCARIEMTI3NBiCOyCuHCjb6p4DMLbrngM4TkAAWAFqCjFfYmFzaWNlY29yCExEQTJQRkJOCjUI1YIBEgM3NjcYrhwgg2ko9OueAzCl7Z4DOE5AAFgBagoxX2Jhc2ljZWNvcghMREEyUEZCTgo2CNWCARIENTM5MxiDaSCReCj67Z4DMMnungM4TkAAWAFqCjFfYmFzaWNlY29yCExEQTJQRkJOCnAKNgjVggESBDEwOTIYkXggg2kor4GfAzCRgp8DOE5AAFgBagoxX2Jhc2ljZWNvcghMREEyUEZCTgo2CNWCARIEMTg0MxiDaSCCOyjpgp8DMJKEnwM4TkAAWAFqCjFfYmFzaWNlY29yCExEQTJQRkJOEgoIARABGAEqAlVBGAEiBAgBEAEoAigDKAQwCw) Thu, Dec 3 - Sat, Dec 5 · CMH · RAP · Roundtrip [Select Delta flight, departing Sun, Dec 6 from Columbus to Rapid City, returning Thu, Dec 10, priced at $369 Found 3 hours ago](https://www.expedia.com/Flights-Search?leg1=from:CMH,to:RAP,departure:12/6/2026TANYT&leg2=from:RAP,to:CMH,departure:12/10/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:368.40&airProductToken=AQpuCjUIxJgBEgQxNDIwGII7IMx8KPyHnwMw%5FoifAzhFQABYAWoJTUFJTkJBU0lDcghWRFZOQTBCUQo1CMSYARIEMzk3MRjMfCCReCjniZ8DMOKKnwM4RUABWAFqCU1BSU5CQVNJQ3IIVkRWTkEwQlEKbgo1CMSYARIEMzk3MRiReCDMfCiNuJ8DMPS4nwM4RUAAWAFqCU1BSU5CQVNJQ3IIVkRWTkEwQlEKNQjEmAESBDE1NDUYzHwggjsovbmfAzCuup8DOEVAAVgBaglNQUlOQkFTSUNyCFZEVk5BMEJREgoIARABGAEqAkRMGAEiBAgBEAEoAigDKAQwAQ) Sun, Dec 6 - Thu, Dec 10 · CMH · RAP · Roundtrip [Select United flight, departing Thu, Apr 1 from Columbus to Rapid City, returning Tue, Apr 6, priced at $372 Found 1 day ago](https://www.expedia.com/Flights-Search?leg1=from:CMH,to:RAP,departure:4/1/2027TANYT&leg2=from:RAP,to:CMH,departure:4/6/2027TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:371.22&airProductToken=AQqnAQo2CNWCARIEMzUyNBiCOyCuHCiEoKkDMNegqQM4TkAAWAFqCjFfYmFzaWNlY29yCExEQTJQRkJOCjYI1YIBEgQxMjE3GK4cIINpKJ-hqQMwv6KpAzhOQABYAWoKMV9iYXNpY2Vjb3IITERBMlBGQk4KNQjVggESAzY2ORiDaSCReCjQo6kDMJakqQM4TkAAWAFqCjFfYmFzaWNlY29yCExEQTJQRkJOCm4KNQjVggESAzI5NBiReCCDaSjx2akDML3aqQM4TkAAWAFqCjFfYmFzaWNlY29yCExEQTJQRkJOCjUI1YIBEgM0ODAYg2kggjsoqtupAzDQ3KkDOE5AAFgBagoxX2Jhc2ljZWNvcghMREEyUEZCThIKCAEQARgBKgJVQRgBIgQIARABKAIoAygEMAs) Thu, Apr 1 - Tue, Apr 6 · CMH · RAP · Roundtrip ## Alternative airports near Keystone Prices were available within the past 7 days. Prices and availability are subject to change. [Select flight to Rapid City Regional RAP. Cheapest and Closest option available. Average driving time to city center is 43 minutes. Flights from $649](https://www.expedia.com/Flights-Search?leg1=from:CMH,to:RAP,departure:11/27/2026TANYT&leg2=from:RAP,to:CMH,departure:11/30/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) 43 min ## Find the cheapest month to fly from Columbus (CMH) to Rapid City (RAP) ### August is typically the cheapest month to fly From $328 - $862 per traveler. View flights in August Insights are based on prices from searches for economy trips of 10 days or less on our sites in the last 12 months. Insights are informative only and current prices may differ. ## Book with confidence ### Flights to Keystone at a glance Traveling to Keystone is easy; you can choose from a range of options, including both full-service and low-cost airlines. Compare journey times to find the best fit for your budget and schedule, and prepare to explore the city's renowned sights and neighborhoods with convenient direct flights to Keystone. - **Major airports near Keystone**: Rapid City Regional Airport (RAP), Chadron Municipal Airport (CDR) - **Closest airport to Keystone**: Rapid City Regional Airport, RAP (around 21 miles) - **Flights per week**: 1,200+ flights arriving across Keystone airports - **Number of airlines that fly to Keystone**: around 5+ carriers ### Popular airports near Keystone Keystone is a charming city ideal for outdoor enthusiasts and those seeking adventure, stunning scenery, romance, and eco-friendly experiences. Travelers flock to Keystone for its natural beauty and recreational opportunities. The city is conveniently served by two major airports, including the Rapid City Regional Airport, making access straightforward for visitors. - **Rapid City Regional Airport ([RAP](https://www.expedia.com/cheap-flights-to-rapid-city-regional.d5259602.travel-guide-flights)):** Situated in Pennington County, South Dakota, approximately 21 miles from Keystone, this airport caters to both domestic and international travelers. It connects to over 145 domestic cities and 9 international locations, with options for upgrading to first class and premium economy seating on select routes. Major airlines include United, American Airlines, and Delta. - **Chadron Municipal Airport ([CDR](https://www.expedia.com/cheap-flights-to-chadron-municipal.d6026918.travel-guide-flights)):** Found in Dawes County, Nebraska, roughly 75 miles from Keystone, this airport primarily serves domestic flights. Key airlines operating from here are Key Lime DBA Denver Air Connection and Southern Airways, providing local travelers with essential connectivity. ### Top routes to Keystone - Chicago (ORD) to Keystone (RAP), with one-way fares starting at around $100 - Denver (DEN) to Keystone (RAP/CDR), with one-way flights starting at around $60 - Seattle (SEA) to Keystone (RAP), with one-way tickets available from around $150 - Dallas (DFW) to Keystone (RAP), with one-way flight options from around $180 - Orlando (MCO) to Keystone (RAP), with one-way airfare from around $140 ### Cheapest routes to Keystone - Denver (DEN) to Keystone (RAP/CDR), with cheap one-way fares from around $60 - Minneapolis (MSP) to Keystone (RAP), with budget one-way fares from around $65 - Chicago (ORD) to Keystone (RAP), with budget one-way fares from around $100 - Grand Junction (GJT) to Keystone (RAP), with low-cost one-way tickets from around $110 - Colorado Springs (COS) to Keystone (RAP), with low one-way fares from around $110 \*Flight times and fares vary by season and availability and are based on one-way routes ### Top airlines with flights to Keystone - **[United](https://www.expedia.com/united-flights.cua.travel-guide-airlines):** Operating flights to Rapid City Regional Airport (RAP), United represents about 60% of arrivals in Keystone. The average fare for a one-way ticket is roughly $260, with potential first-class service available depending on the route. - **[American Airlines](https://www.expedia.com/american-airlines-flights.caa.travel-guide-airlines):** Also flying into Rapid City Regional Airport (RAP), American Airlines makes up approximately 23% of arrivals to Keystone. The average one-way fare is around $290, and premium cabin options may include first class based on the route. - **[Delta](https://www.expedia.com/delta-flights.cdl.travel-guide-airlines):** This airline services Rapid City Regional Airport (RAP), accounting for nearly 16% of arrivals to Keystone. Travelers can expect an average one-way fare of about $270, with potential premium economy and first-class service options depending on the route. - **[Sun Country Airlines](https://www.expedia.com/sun-country-airlines-flights.csy.travel-guide-airlines):** Offering flights to Rapid City Regional Airport (RAP), Sun Country Airlines has an average one-way fare of about $210, providing a budget-friendly travel option to the area. - **[Key Lime DBA Denver Air Connection](https://www.expedia.com/key-lime-air-dba-denver-air-connection-flights.ckg.travel-guide-airlines):** This carrier operates to Chadron Municipal Airport (CDR), with an average one-way fare of around $80, making it an economical choice for travelers heading to Keystone. ### Best time to fly to Keystone The most popular months for travelers to fly to Keystone are **June, July, and August**, when peak temperatures in Keystone can reach up to 69.6°F in July. If you prefer quieter travel, consider **November**, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 34°F. For better deals, **October** usually offers the lowest average one-way fare around **$253**, roughly 7% cheaper than the yearly average. Looking for additional cheaper months to fly? **July, November, and September** offer average one-way fares of around **$260**, making them good options for flexible travelers. | **Month** | **Temperature** | **Precipitation** | **Cloudiness** | **Demand** | **Average one-way Fare** | | --------- | --------------- | ----------------- | -------------- | ---------- | ------------------------ | | January | 23.9°F (-4.5°C) | No Rain (Dry) | Mostly Sunny | Average | $276 | | February | 22.5°F (-5.3°C) | No Rain (Dry) | Mostly Sunny | Low | $281 | | March | 33.6°F (0.9°C) | No Rain (Dry) | Mostly Sunny | Average | $292 | | April | 39.7°F (4.3°C) | Light Rain | Mostly Sunny | Average | $286 | | May | 50.4°F (10.2°C) | Light Rain | Mostly Sunny | Average | $272 | | June | 62.6°F (17.0°C) | Light Rain | Mostly Sunny | High | $286 | | July | 69.6°F (20.9°C) | Light Rain | Mostly Sunny | High | $257 | | August | 68.0°F (20.0°C) | Light Rain | Sunny | High | $264 | | September | 60.6°F (15.9°C) | Light Rain | Sunny | Average | $262 | | October | 44.4°F (6.9°C) | Light Rain | Mostly Sunny | Average | $253 | | November | 34.0°F (1.1°C) | No Rain (Dry) | Mostly Sunny | Low | $258 | | December | 24.3°F (-4.3°C) | No Rain (Dry) | Mostly Sunny | Low | $301 | \*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand. ### How to save money on a flight to Keystone Getting some of the best [deals on flights](https://www.expedia.com/flight-deals) to Keystone is all about timing and flexibility. Here are some key tips to help you save: 1. **Compare flight options**—use **Expedia's search tool** to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also **sort by price** to find the most affordable options. 2. **Set up price alerts**—as an Expedia member you can use [Price Tracking](https://www.expedia.com/why/price-tracking) to receive notifications when flight prices change. 3. **Bundle and save**—book a flight and unlock a hotel deal on Expedia\*, or explore our [Keystone hotel and flight deals](https://www.expedia.com/keystone.d8178.destination-travel-guides). 4. **Think about luggage**\-nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your baggage allowance before confirming your booking to avoid excess baggage fees at the airport. 5. **Earn miles**—you can earn airline miles when you book your Keystone flight with Expedia. Just select your frequent flyer program and enter your program number when confirming your booking. \*For members. Select hotels. ### Arriving in Keystone Keystone welcomes travelers through its range of transport options based on price, convenience, and proximity. Here's how to reach Keystone efficiently: - **Hotel transfer:** Transfers offer a convenient way to reach your hotel in Keystone, with options including [free hotel shuttles](https://www.expedia.com/Keystone-Hotels-Hotels-With-Free-Airport-Shuttle.0-0-d8178-tHotelswithFreeAirportShuttle.Travel-Guide-Filter-Hotels) and private rides, which can be arranged in advance. - **Car rental:** Renting a car in Keystone is a good option if you plan to explore and sightsee beyond the city. Browse [cheap car rentals in Keystone](https://www.expedia.com/car-rentals-in-keystone.d8178.car-rental-guide) on Expedia. - **Taxi/ride-hailing:** Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival. ### Where to stay around Keystone - **[Hill City](https://www.expedia.com/Hill-City-Hotels.d10767.Travel-Guide-Hotels)**: Hill City is located 8 miles drive away from Keystone and is a charming destination for outdoor enthusiasts. This city is surrounded by stunning scenery and offers a range of activities perfect for adventure seekers. Explore the majestic Black Hills, ride the historic 1880 Train for a cultural experience, or hike to the top of Black Elk Peak for breathtaking views. Whether you’re looking for recreational areas or ski fields, Hill City has something for everyone, making it an ideal stop on your journey. - **[Custer](https://www.expedia.com/Custer-Hotels.d94614.Travel-Guide-Hotels)**: Located 12 miles drive away from Keystone, Custer is a vibrant city known for its natural beauty and outdoor adventures. This area is an excellent choice for those interested in exploring national parks and nature reserves. Don’t miss Custer State Park for its stunning landscapes and wildlife, or visit the Crazy Horse Memorial for a glimpse into local history. Sylvan Lake offers a romantic setting perfect for picnics and leisurely strolls, making Custer a must-visit for nature lovers. - **[Rockerville](https://www.expedia.com/Rockerville-Hotels.d553248635924570501.Travel-Guide-Hotels)**: Rockerville is located 6 miles drive away from Keystone and is a quaint village that draws visitors with its outdoor charm. This area is perfect for those seeking recreational activities, with easy access to ski resorts and scenic landscapes. Major attractions include the iconic Mount Rushmore and its National Memorial, both significant cultural landmarks. Additionally, the Cosmos Mystery Area provides a unique and intriguing experience, ensuring that Rockerville is a delightful stop for travelers looking to explore the Black Hills. ### Tips for short-haul flights to Keystone For quick getaways, efficiency is key. Here is how to make your short-haul journey smoother: - **Pack light and skip checked bags**—when flying with budget airlines, traveling with just a carry-on is often more economical. Maximize your space by using travel-sized toiletries, wearing your heaviest clothing, and coordinating outfits ahead of time. This strategy also allows you to bypass the baggage claim upon arrival. - **Bring your own entertainment**—many short-haul flights may lack in-flight entertainment options. To keep yourself occupied, download your favorite TV shows, movies, music, or podcasts in advance, and consider bringing a book. Remember to fully charge your devices before you board. - **Arrive at the airport in plenty of time**—for short or domestic flights, it’s advisable to arrive at least 1.5 to 2 hours prior to departure, taking into account potential traffic and security delays. - **Bring your own snacks and water**—pack your own snacks and a refillable water bottle to stay hydrated and save money while at the airport. ### Tips for long-haul flights to Keystone Flying long-haul sometimes requires extra planning to ensure a comfortable journey: - **Select your seat in advance**—for longer flights, choosing your seat is essential for comfort. Full-service airlines often provide free seat selection once online check-in opens, typically 24–48 hours before your flight. Some airlines may allow seat selection even earlier. - **Arrive at the airport in plenty of time**—make sure to arrive at least 3 hours before departure for international flights to accommodate check-in, security, and immigration procedures. - **Relax at the airport**—if you have some extra time, explore the shops, grab a coffee, or unwind at the gate or in a departure lounge if you have access. Airport Wi-Fi is generally free and available. - **Adjust to the new time zone mid-flight**—begin to sync your body clock by changing your watch and adjusting your sleep schedule to align with your destination's time zone. Try to sleep or stay awake during the flight according to the local time at your arrival destination to help minimize jet lag. ### Tips to find the cheapest flights to Keystone ### The cheapest day to fly Get started finding a cheap flight to Keystone on Expedia by either choosing a deal on this page or entering into the search bar your travel dates, origin airport, and whether you want roundtrip or one-way airfare. You can filter for flexibility, number of stops, airline, and departure/arrival times to find the best flight for you. ### The cheapest month to fly December is the cheapest month to fly to Keystone. This coincides with the low season when fewer people travel. Whichever month you travel in, though, be sure to book at least a month in advance if you want to score cheap tickets to Keystone. ARC's data shows that domestic flights booked 28 days or more before departure are typically 24% cheaper than those booked last minute. ### The most affordable time to book a flight Typically, a Sunday can be the cheapest time to book a flight to Keystone, according to ARC’s data. On average, you could save between 6% and 13% by booking on a Sunday instead of a Friday, which is the most expensive day to make a reservation. ### The cheapest round-trip tickets to Keystone The lowest price for round-trip flights to Keystone in 2026 starts from $115, while one-way tickets start from from $68\. Expedia's effective search tool is one of the best ways to find a budget airfare. Simply enter your dates, and within seconds, it'll show you a vast selection of the cheapest flights to Keystone. If you have a preferred departure time or airline, you can use the handy filters to customize your search. ### The cheapest airlines flying to Keystone Allegiant Air, United, Delta, American Airlines are just some of the airlines that can typically offer cheap tickets to Keystone. You can find their most affordable flights by using the “airline” search filter and then sorting prices from low to high. As a trusted partner of the world's leading airlines, Expedia offers you some of the best airfare deals to Keystone and countless more destinations worldwide. ### The most affordable airports to fly into To view the cheapest airports to fly into for Keystone, simply order your search results from lowest to highest price. Expedia's search tool compares flight prices for all airports close to your destination, so you don't have to manually search them one by one to find the cheapest flight to Keystone. If you have a preferred place to fly into, take advantage of the “arrival airport” filter to narrow down your search on Expedia. ### Save with a package With Expedia's amazing [package deals](https://www.expedia.com/package-deals), you could save hundreds of dollars by booking your Keystone plane tickets together with your accommodations, car rental, or activities. Just select the search wizard's “package” option to view some of the cheapest deals. Look out for the green savings label to see how much you're saving. ### Date flexibility for the cheapest flights to Keystone If you can be flexible with your travel dates, it's a good idea to broaden your search by comparing prices on different days. This will open up more options, meaning you could uncover a less expensive flight to Keystone. ### Stopover savings The cheapest tickets to Keystone are sometimes those with a stopover. Book one of these flights, and you'll change planes at an airport en route to Keystone. While the overall travel time might be longer than a non-stop flight, you may decide it's worth it for the money saved. ### Get Expedia's Price Drop Protection Price Drop Protection means that if your flight gets cheaper after booking, you'll be credited the difference\*. This gives you peace of mind that you're getting one of the cheapest flights to Keystone for your chosen departure. Expedia's Price Drop Protection is available for a small fee but is free to One Key Gold and Platinum tier members. *\*Terms apply.* ### Use our Price Tracking feature Expedia's Price Tracking feature is another great tool that removes the guesswork from finding cheap flights to Keystone. Simply download the free Expedia app to your smart device and activate Keystone flight price alerts for your travel dates. There's even a price predictor tool that uses historical data to indicate the best time to book, giving you peace of mind that you'll nab the lowest prices. ### Book with Expedia As well as Price Drop Protection and Price Tracking, Expedia's close partnership with a vast selection of the world's leading airlines means you're sure to find cheap flights to Keystone. Plus, the One Key rewards program lets you earn real cash rewards on most bookings that you can use to save money on future trips. Best of all, it's free to join, and members often unlock exclusive discounts, too. *Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023\. The percentages you see are averages.* ## Frequently Asked Questions ### What month is the cheapest to fly to Keystone? The cheapest month to fly to Keystone is December when demand is low. Off-peak months are usually when you'll find cheap flights. To save money, steer clear of flying during public holidays and school breaks. ### Which US cities have the cheapest flights to Keystone? Usually, Denver, Minneapolis - St. Paul and Dallas offer cheap flights to Keystone. However, being flexible is the secret to bagging the lowest fares. Plan your escape midweek or during the low season to keep costs as low as possible. ### Which US cities fly direct to Keystone? You can fly to Keystone without any stops from 6 US cities. To find a nonstop route, select "Direct flights only" when browsing for flights to Keystone on Expedia. Then, explore your choices and find the best departure from one of these cities: - Denver - Minneapolis - St. Paul - Dallas - Chicago - Phoenix ### How to find a cheap flight to Keystone? Book in advance for the best chance of scoring cheap flights to Keystone. Also, consider traveling during off-peak months like December and January. If you jet off on a Thursday, you can save an average of 16% compared to departing on a Sunday.\* Save time checking every day and track your flight prices using the [Expedia app](https://www.expedia.com/app). We'll let you know when fares change. *\*Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.* ### How to get a cheap last-minute flight to Keystone? Although booking in advance is generally the easiest way to save money, don't panic if your Keystone getaway is last minute. You can still get cheap flights to Keystone, especially if your plans have some flexibility. Try changing your dates, exploring different ticket options or flying out of another airport. ### How far in advance should I book a flight to Keystone? Get the departure dates you want and a price that's easy on your pocket by booking your domestic flight to Keystone up to 28 days in advance. Search for tickets between two and four months ahead if you're visiting Keystone from an international destination.\* *\*Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.* ### Which day of the week is the cheapest day to buy a plane ticket to Keystone? You'll save an average of 8% if you purchase plane tickets on a Sunday instead of Fridays, which tend to be the priciest day to book.\* When it comes to scoring a cheap flight to Keystone, it's all about timing. *\*Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.* ### Which airlines fly to Keystone? Keystone is connected to 4 airports around the world through 3 carriers, such as United Airlines. Rapid City Regional Airport (RAP) is the principal hub for several airlines to Keystone. Delta Air Lines can also take you to this exciting destination. ### Where do you fly into Keystone? The main airport to fly to Keystone is Rapid City Regional Airport (RAP). You also have the option to touch down at Spearfish, SD (SPF-Black Hills) when flying to Keystone. ### How far is the airport from central Keystone? If you're touching down at Rapid City Regional Airport (RAP), you'll be approximately 20 mi northeast of the center of Keystone. ### Can I save money by booking a Keystone trip package? Book a [Keystone flight and hotel package deal](https://www.expedia.com/Keystone.d8178.Destination-Travel-Guides) on Expedia, and you can make significant savings. It's easy to bundle your accommodations and flights, and you can even add tours and car rentals to create your own personalized Keystone trip. Plus, nothing beats the convenience of booking everything in one place. ### Can I change or cancel my flight to Keystone? If you bought your flight to Keystone in the last 24 hours, you can often cancel or change it for free. After that, additional costs may apply depending on the airline's terms and conditions. To learn more, check out our [Customer Service Portal](https://www.expedia.com/service/?langid=1033). Remember that some flights are non-refundable, so you may be offered a credit toward future travel in place of a direct refund. When searching on Expedia, select the "Changes included" or "No cancel fee" boxes to see fares with flexible change policies. ## Travel information | Destination city name | Rapid City | | ----------------------------- | ------------------------------------------------------------------------------------------------------------ | | Destination airport | Rapid City Regional Airport | | Destination airport IATA code | RAP | | Airlines serving | American Airlines, United, Delta, Allegiant Air, KLM, Virgin Atlantic, Air France, Qatar Airways, Korean Air | | Popular airline | American Airlines | | Roundtrip price | $359 | ## Explore a world of travel with Expedia - [Lodging](?equalTargetTab=tab-0) - [Flights](?equalTargetTab=tab-1) - [Packages](?equalTargetTab=tab-2) - [Cars](?equalTargetTab=tab-3) - [Vacation Rentals](?equalTargetTab=tab-4) - [Things to Do](?equalTargetTab=tab-5) - [Cabin Rentals in Hill City](https://www.expedia.com/Hill-City-Cabins.d10767-aaCabins.Travel-Guide-Accommodation) - 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[Things to do in Keystone](https://www.expedia.com/Things-To-Do-In-Keystone.d8178.Travel-Guide-Activities) ## Trending flights to Keystone Prices were available within the past 7 days and start at $68 for one-way flights and $115 for roundtrip, for the period specified. Prices and availability are subject to change. All deals One way Roundtrip [Select Allegiant Air flight, departing Thu, Dec 31 from Mesa to Rapid City, returning Mon, Jan 4, priced at $115 Found 1 hour ago](https://www.expedia.com/Flights-Search?leg1=from:AZA,to:RAP,departure:12/31/2026TANYT&leg2=from:RAP,to:AZA,departure:1/4/2027TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:115.00&airProductToken=AQoqCigIx2gSAzczNxigBiCReCiAoqEDMIqjoQM4S0AAWAFqAkRGcgRLTkVXCioKKAjHaBIDNjgzGJF4IKAGKLHUoQMwxtWhAzhKQABYAWoCREZyBEpORVcSCggBEAEYASoCRzQYASIECAEQASgCKAMoBDAN) Thu, Dec 31 - Mon, Jan 4 · AZA · RAP · Roundtrip \*Available to One Key members. ## Other language versions ```yaml hreflang: x-default: https://www.expedia.com/Cheap-Flights-To-Keystone.d8178.Travel-Guide-Flights en-TW: https://www.expedia.com.tw/en/Cheap-Flights-To-Keystone.d8178.Travel-Guide-Flights en-US: https://www.expedia.com/Cheap-Flights-To-Keystone.d8178.Travel-Guide-Flights pt-BR: https://www.expedia.com.br/Voos-Para-Keystone.d8178.guia-de-voos en-HK: https://www.expedia.com.hk/en/Flights-To-Keystone.d8178.Travel-Guide-Flights fr-FR: https://www.expedia.fr/Vols-Pas-Cher-Keystone.d8178.Voyage-Guide-Vols zh-CN: https://www.expedia.com/cn/Flights-To-Keystone.d8178.Travel-Guide-Flights en-IN: https://www.expedia.co.in/Cheap-Flights-To-Keystone.d8178.Travel-Guide-Flights ko-KR: https://www.expedia.co.kr/Cheap-Flights-To-Keystone.d8178.Travel-Guide-Flights it-IT: https://www.expedia.it/Voli-Per-Keystone.d8178.Guida-Voli-aerei en-JP: https://www.expedia.co.jp/en/Cheap-Flights-To-Keystone.d8178.Travel-Guide-Flights en-TH: https://www.expedia.co.th/en/Cheap-Flights-To-Keystone.d8178.Travel-Guide-Flights en-GB: https://www.expedia.co.uk/Cheap-Flights-To-Keystone.d8178.Travel-Guide-Flights es-ES: https://www.expedia.es/Vuelos-Baratos-A-Keystone.d8178.Guia-Viajes-Vuelos en-CA: https://www.expedia.ca/Cheap-Flights-To-Keystone.d8178.Travel-Guide-Flights ja-JP: https://www.expedia.co.jp/Cheap-Flights-To-Keystone.d8178.Travel-Guide-Flights de-AT: https://www.expedia.at/Billigflug-Keystone.d8178.Reise-Angebote-Flug es: https://www.expedia.com/es/Vuelos-Baratos-Keystone.d8178.Guia-de-vuelos de-DE: https://www.expedia.de/Billigflug-Keystone.d8178.Reise-Angebote-Flug en-AU: https://www.expedia.com.au/Flights-To-Keystone.d8178.Travel-Guide-Flights fr-BE: https://www.expedia.be/fr/Vols-Keystone.d8178.Guide-De-Vol en-NZ: https://www.expedia.co.nz/Flights-To-Keystone.d8178.Travel-Guide-Flights en-SG: https://www.expedia.com.sg/Cheap-Flights-To-Keystone.d8178.Travel-Guide-Flights en-MY: https://www.expedia.com.my/Flights-To-Keystone.d8178.Travel-Guide-Flights es-MX: https://www.expedia.mx/Vuelos-Baratos-Keystone.d8178.Guia-de-vuelos ar: https://www.expedia.sa/Cheap-Flights-To-Keystone.d8178.Travel-Guide-Flights sv-SE: https://www.expedia.se/Flyg-Till-Keystone.d8178.Reseguide-Flyg en-IE: https://www.expedia.ie/Flights-To-Keystone.d8178.Travel-Guide-Flights da-DK: https://www.expedia.dk/Fly-Til-Keystone.d8178.Rejse-Guide-Fly ```