$33 Cheap Flights to Castle Rock, WA

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.

*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.

Tips to find the cheapest flights to Castle Rock

The cheapest day to fly

Get started finding a cheap flight to Castle Rock 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

October is the cheapest month to fly to Castle Rock. 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 Castle Rock. 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 Castle Rock, 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 Castle Rock

The lowest price for round-trip flights to Castle Rock in 2026 starts from $66, while one-way tickets start from from $33. 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 Castle Rock. If you have a preferred departure time or airline, you can use the handy filters to customize your search.

The cheapest airlines flying to Castle Rock

Frontier Airlines, Alaska Airlines, Southwest Airlines, Delta, United, American Airlines are just some of the airlines that can typically offer cheap tickets to Castle Rock. 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 Castle Rock and countless more destinations worldwide.

The most affordable airports to fly into

To view the cheapest airports to fly into for Castle Rock, 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 Castle Rock. 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 Castle Rock 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 Castle Rock

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 Castle Rock.

Stopover savings

The cheapest tickets to Castle Rock are sometimes those with a stopover. Book one of these flights, and you'll change planes at an airport en route to Castle Rock. 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 Castle Rock 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 Castle Rock. Simply download the free Expedia app to your smart device and activate Castle Rock 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 Castle Rock. 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.