A mountainous landscape with dense forests and rocky cliffs.

$59 Cheap Flights to Castle Rock, WA

Popular airlines to Castle Rock

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How much is the cheapest flight to Castle Rock?

Prices were available within the past 7 days and start at $59 for one-way flights and $96 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Alaska Airlines
United
Delta
American Airlines

What you need to know for your flight to Castle Rock

Flights to Castle Rock at a glance

Traveling to Castle Rock is easy—just choose between full-service and budget airlines, compare flight durations, and select the option that fits your budget and schedule. Get ready to explore the city’s renowned sights and neighborhoods!

  • Major airport near Castle Rock: Portland International Airport (PDX)
  • Flights per week: 4,750+ flights arriving at Castle Rock airport
  • Number of airlines that fly to Castle Rock: around 55+ carriers

Popular airport near Castle Rock

Castle Rock is a vibrant city ideal for those seeking outdoor adventures, stunning scenery, and romantic getaways. With its appeal to families and thrill-seekers alike, Castle Rock is conveniently accessible via a major airport, making travel plans straightforward for visitors.

  • Portland International Airport (PDX): Situated in Multnomah County, Oregon, approximately 50 miles from Castle Rock, this airport provides access to both domestic and international flights, with connections to over 240 domestic cities and more than 170 international locales. Travelers have the option to enhance their journey by upgrading to first class, business class, or premium economy seating for added comfort, depending on the airline and route. Key airlines that operate here include Alaska Airlines, Delta, and American Airlines.

Top routes to Castle Rock

  • Los Angeles (LAX) to Castle Rock (PDX), with one-way airfare from around $50
  • Phoenix (PHX) to Castle Rock (PDX), with one-way fares starting at around $60
  • Las Vegas (LAS) to Castle Rock (PDX), with one-way fares starting at around $50
  • Denver (DEN) to Castle Rock (PDX), with one-way airfare from around $55
  • Chicago (ORD/MDW) to Castle Rock (PDX), with one-way fares starting at around $85

Cheapest routes to Castle Rock

  • San Francisco (SFO) to Castle Rock (PDX), with low one-way fares from around $40
  • Sacramento (SMF) to Castle Rock (PDX), with affordable one-way prices from around $50
  • San Jose (SJC/SJO) to Castle Rock (PDX), with low one-way fares from around $50
  • Oakland (OAK) to Castle Rock (PDX), with low-cost one-way tickets from around $50
  • Las Vegas (LAS) to Castle Rock (PDX), with budget one-way fares from around $50

*Flight times and fares vary by season and availability and are based on one-way routes

Top airlines with flights to Castle Rock

  • Alaska Airlines: Operating flights to Portland International Airport (PDX), Alaska Airlines makes up approximately 24% of the arrivals in Castle Rock. Passengers can expect an average one-way fare of around $270, with options for premium cabins like business and first class based on the route.
  • Delta: Also servicing Portland International Airport (PDX), Delta accounts for roughly 18% of arrivals to Castle Rock. The average fare for a one-way ticket is about $350, and premium cabin selections may include premium economy and first class, depending on the journey.
  • United: Offering flights to Portland International Airport (PDX), United similarly represents around 18% of arrivals to Castle Rock. Travelers can anticipate average one-way fares near $350, with premium cabin choices often including premium economy and first class, varying by route.
  • American Airlines: Flying into Portland International Airport (PDX), American Airlines contributes about 17% of arrivals at Castle Rock. One-way fares average approximately $360, featuring first class as a potential premium service option depending on the specific route.
  • Southwest Airlines: Servicing Portland International Airport (PDX), Southwest Airlines accounts for roughly 13% of arrivals to Castle Rock. Travelers can look forward to an average one-way fare of about $240, making it a competitive choice for budget-conscious flyers.

Best time to fly to Castle Rock

The most popular months for travelers to fly to Castle Rock are January, March, and April, when peak temperatures in Castle Rock can reach up to 47.1°F in April. If you prefer quieter travel, consider September, the least busy time to visit with temperatures around 59.5°F and typically the lowest average one-way fare (around $210), roughly 8% cheaper than the yearly average. Looking for additional cheaper months to fly? October, May, and August offer average one-way fares of around $215, making them good options for flexible travelers.

calendar iconMonthtemperature iconTemperaturerain iconPrecipitationmostly cloudy iconCloudinesscrowd level iconDemandprice iconAverage one-way Fare
January38.7°F (3.7°C)Light RainMostly CloudyModerately High$248
February39.2°F (4.0°C)Light RainMostly CloudyAverage$221
March42.6°F (5.9°C)Light RainMostly CloudyModerately High$256
April47.1°F (8.4°C)Light RainMostly CloudyModerately High$232
May54.0°F (12.2°C)Light RainMostly CloudyAverage$216
June58.8°F (14.9°C)Light RainMostly SunnyAverage$228
July64.0°F (17.8°C)No Rain (Dry)Mostly SunnyAverage$231
August64.9°F (18.3°C)No Rain (Dry)Mostly SunnyAverage$219
September59.5°F (15.3°C)Light RainMostly SunnyModerately Low$210
October50.9°F (10.5°C)Light RainMostly SunnyAverage$211
November42.4°F (5.8°C)Moderate RainMostly CloudyModerately Low$224
December37.6°F (3.1°C)Light RainMostly CloudyModerately Low$248

*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 Castle Rock

Getting some of the best deals on flights to Castle Rock 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 Castle Rock 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 Castle Rock flight with Expedia. Just select your frequent flyer program and enter your program number when confirming your booking.

*For members. Select hotels.

Arriving in Castle Rock

Castle Rock welcomes travelers through its range of transport options based on price, convenience, and proximity. Here's how to reach Castle Rock efficiently:

  • Public transportation: From Portland International Airport, both the Portland International Airport Bus Stop (a bus station) and the Portland International Airport Station (a metro station) are conveniently located about 0.3 miles away by walking. Meanwhile, Portland Union Station (a train station) is situated approximately 9 miles from the airport and is best reached by car.
  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Castle Rock, with private rides that can be arranged in advance.
  • Car rental: Renting a car in Castle Rock is a good option if you plan to explore and sightsee beyond the city. Browse cheap car rentals in Castle Rock 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 Castle Rock

  • Longview: Longview is located 10 miles drive away from Castle Rock and is a fantastic destination for outdoor enthusiasts and adventure seekers. Visitors can explore the stunning Lake Sacajawea Park, perfect for families and those looking to unwind in nature. History buffs will appreciate the Cowlitz County Historical Museum, which offers a glimpse into local culture. For pet owners, the Gerhart Gardens Off-Leash Dog Park provides a great space for furry friends to roam freely. With its blend of scenery and recreational activities, Longview is an inviting stop on your journey.
  • Kelso: Kelso is located 9 miles drive away from Castle Rock and offers a vibrant mix of outdoor adventure and shopping experiences. Nature lovers can enjoy the peaceful Tam O'Shanter Park, ideal for family outings and outdoor activities. The Cowlitz County Historical Museum is another highlight, showcasing the area's rich history and culture. For those looking to stretch their legs with their pets, the Gerhart Gardens Off-Leash Dog Park is a welcoming spot. With its scenic beauty and engaging attractions, Kelso is a rewarding place to explore.
  • Silver Lake: Silver Lake is located 5 miles drive away from Castle Rock and is a serene escape for those seeking outdoor adventures and picturesque landscapes. Seaquest State Park offers thrilling opportunities for hiking and nature exploration, while Rainier City Park is perfect for families wanting a relaxing day outdoors. The Cowlitz County Historical Museum also adds to the cultural experience for visitors. With its charming lake and nearby mountains, Silver Lake is an excellent destination for anyone looking to connect with nature.

Tips for short-haul flights to Castle Rock

For quick getaways, efficiency is key. Here is how to make your short-haul journey smoother:

  • Pack light and skip checked bags—with budget airlines, traveling with only a carry-on is often more economical. Save space by opting for mini toiletries, wearing your bulkiest clothing, and organizing your outfits efficiently. This approach also allows you to bypass the wait at baggage claim upon arrival.
  • Bring your own entertainment—many short-haul flights may lack in-flight entertainment options. To stay engaged, download TV shows, movies, music, or podcasts ahead of time, and consider bringing a book. Remember to fully charge your devices before you board.
  • Arrive at the airport in plenty of time—even for short or domestic flights, it's advisable to get to the airport at least 1.5 to 2 hours before departure to account for traffic and security lines.
  • Bring your own snacks and water—pack snacks and a refillable water bottle to stay hydrated and save money while at the airport.

Tips for long-haul flights to Castle Rock

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 allow free seat selection once online check-in begins, typically 24–48 hours prior to your flight. Some airlines may even permit seat selection earlier than this.
  • Arrive at the airport in plenty of time—aim to reach the airport at least 3 hours before departure for international flights to accommodate check-in, security, and immigration processes.
  • Relax at the airport—if you have extra time, take the opportunity to 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 syncing your body clock by changing your watch and modifying 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 of your arrival to help minimize jet lag.

Frequently asked questions

What month is the cheapest to fly to Castle Rock?
Schedule your trip for October if you want to get a good price on your fare. It's the cheapest month to fly to Castle Rock. Try to avoid traveling during peak periods such as public holidays or major events.
Which US cities have the cheapest flights to Castle Rock?
Generally, Portland, Anchorage and Phoenix offer cheap flights to Castle Rock. However, flexibility is the secret to landing the lowest prices. Head off midweek or during the low season to keep costs down.
Which US cities fly direct to Castle Rock?
You can fly to Castle Rock directly from 83 US destinations. To find a nonstop journey, check "Direct flights only" when looking for flights to Castle Rock on Expedia. Then, explore the options and find the best departure out of one of these cities:

  • Portland
  • Anchorage
  • Phoenix
  • Los Angeles
  • Spokane

How to find a cheap flight to Castle Rock?
To get cheap flights to Castle Rock, book as early as possible and consider traveling during the low season. Want a handy tip? Fly on a Thursday and you'll typically save 16% on average compared to those who jet off on a Sunday.* Set up price tracking on the Expedia app and we'll notify you the moment prices drop.*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 Castle Rock?
You can find great deals on last-minute departures to Castle Rock, especially if your plans aren't set in stone. Think about jetting out of a different hub, tweaking your trip dates or picking an alternative carrier to get a cheap flight to Castle Rock.
How far in advance should I book a flight to Castle Rock?
Book your flight to Castle Rock two to four months ahead if you're taking off from an international destination. For domestic travel, the general guideline is 28 days in advance. Cheaper fares and a wider variety of departure dates, times and seating options are just a few of the benefits of booking early.**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 Castle Rock?
Generally, you can get cheap flights to Castle Rock on a Sunday. You can save about 8% on average compared to those who book on a Friday, which is often the most expensive day to purchase tickets.**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 Castle Rock?
Take your pick of these two popular carriers that offer flights to Castle Rock:

  • Alaska Airlines - 11,812 flights to Castle Rock each month, including 8,912 flights to Seattle - Tacoma Intl. Airport (SEA) per month.
  • Delta Air Lines - 4,921 flights to Castle Rock each month, including 4,158 flights to Seattle - Tacoma Intl. Airport (SEA) per month.

Can I save money by booking a Castle Rock trip package?
It's possible to save hundreds of dollars if you secure a Castle Rock flight and hotel package deal on Expedia. And you'll save time and hassle by having all your travel arrangements in one place. Try bundling your hotel and flight with extras like car rentals and activities for your own customized Castle Rock getaway.
Can I change or cancel my flight to Castle Rock?
It's usually possible to change or cancel your flight to Castle Rock. Many airlines let you cancel your flights for free within 24 hours of making your booking. However, some flights are non-refundable, and airlines may offer you a credit toward a future flight rather than a direct refund. To get cheap flights to Castle Rock with flexible change policies, select "Changes included" or "No cancel fee" when you search. Need more information? Visit our Customer Service Portal.

*Flight schedules are subject to change.

*Available to One Key members.

 

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Travel information

Destination airport
Seattle - Tacoma Intl.
Destination airport IATA code
SEA
Destination city name
Seattle
Roundtrip price
$96

Trending flights to Castle Rock

Prices were available within the past 7 days and start at $59 for one-way flights and $96 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines

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