$55 Cheap Flights to Keystone, SD

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): 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): 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: 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: 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: 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: 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: 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.

*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 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 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.
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 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 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: 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: 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: 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 $110, while one-way tickets start from from $55. 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, 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.