$43 Cheap Flights to Kelso, WA

Flights to Kelso at a glance

Traveling to Kelso is easy—simply select from either full-service or budget airlines. You can compare journey times and find the cheapest flights to Kelso that align with your budget and schedule, allowing you to make the most of your visit to the city's renowned attractions and neighborhoods.

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

Popular airport near Kelso

Kelso is a charming city perfect for outdoor enthusiasts and those seeking scenic adventures. Visitors flock to Kelso for its stunning landscapes, romantic spots, and family-friendly activities. The city is conveniently accessible via a major airport, making it easy to book flights to Kelso Airport for your getaway.

• Portland International Airport (PDX): Situated in Multnomah County, Oregon, approximately 41 miles from Kelso, this airport caters to both domestic and international travelers. It boasts connections to over 240 domestic cities and more than 170 international destinations. Passengers have the option to enhance their travel experience with upgrades to first class, business class, or premium economy seating, depending on the airline and specific routes. Notable airlines operating at this airport include Alaska Airlines, Delta, and American Airlines.

Top routes to Kelso

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

Cheapest routes to Kelso

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

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

Top airlines with flights to Kelso

• Alaska Airlines: Provides service to Portland International Airport (PDX) and represents about 24% of arrivals in Kelso. The average fare for a one-way ticket is roughly $270. Depending on the route, premium cabin options may include business and first class.
• Delta: Offers flights to Portland International Airport (PDX), contributing around 18% of arrivals to Kelso. The estimated one-way fare is about $350. Premium cabin selections might feature premium economy and first class, depending on the journey.
• United: Operates flights to Portland International Airport (PDX), accounting for nearly 18% of arrivals in Kelso. Average one-way fares hover around $350. Premium cabin options may consist of premium economy and first class based on the specific route.
• American Airlines: Flies into Portland International Airport (PDX), comprising about 17% of arrivals to Kelso. The typical fare for a one-way ticket is around $360. Premium cabin service may include first class, depending on the route.
• Southwest Airlines: Serves Portland International Airport (PDX), making up approximately 13% of arrivals to Kelso. The average one-way fare is approximately $240, offering travelers a cost-effective option for their journey.

Best time to fly to Kelso

The most popular months for travelers to fly to Kelso are January, March, and April, when peak temperatures in Kelso can reach up to 47.3°F in April. If you prefer quieter travel, consider September, the least busy time to visit with temperatures around 59.7°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 Kelso

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

*For members. Select hotels.

Arriving in Kelso

Kelso welcomes travelers through its range of transport options based on price, convenience, and proximity. Here's how to reach Kelso 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 and can be reached on foot. Meanwhile, Portland Union Station (a train station) is situated approximately 9 miles from the airport and is best accessed by car.
• Hotel transfer: Transfers offer a convenient way to reach your hotel in Kelso, with private rides that can be arranged in advance.
• Car rental: Renting a car in Kelso is a good option if you plan to explore and sightsee beyond the city. Browse cheap car rentals in Kelso 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 in and around Kelso

• Longview: Located 1 mile drive away from Kelso, Longview is a vibrant city that invites travelers seeking outdoor adventures and stunning scenery. The area boasts various recreational venues and shopping options, making it a convenient stop. Key attractions include Lake Sacajawea Park, an ideal spot for families and outdoor enthusiasts, and the Cowlitz County Historical Museum, which offers a glimpse into local culture. For dog lovers, the Gerhart Gardens Off-Leash Dog Park provides a perfect venue to enjoy time with your furry friends in a beautiful setting.
• Rocky Point: Nestled in the area of Kelso, Rocky Point is a charming village perfect for those looking for romance and breathtaking scenery. The village features recreational areas and a local cinema, offering a relaxed atmosphere for visitors. Key points of interest include Lake Sacajawea Park, suitable for families, and the Cowlitz County Historical Museum for culture buffs. The serene urban park and nearby beach provide excellent opportunities to unwind amidst nature, making Rocky Point a peaceful retreat for travelers.
• Castle Rock: Castle Rock is located 9 miles drive away from Kelso and is known for its majestic outdoor landscapes and adventure opportunities. This city is a gateway to nature, with access to national state parks and scenic mountains. Visitors can explore Seaquest State Park for outdoor activities or enjoy family time at Lake Sacajawea Park. The Cowlitz County Historical Museum also offers insight into the area's rich history, making Castle Rock a delightful destination for nature lovers and culture seekers alike.

Tips for short-haul flights to Kelso

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 just a carry-on is often more economical. Maximize your space by bringing mini toiletries, wearing your bulkiest clothes, and planning your outfits wisely. This approach also helps you avoid the wait at baggage claim once you arrive.
• Bring your own entertainment—many short-haul flights might not provide in-flight entertainment. Download your favorite TV shows, movies, music, or podcasts ahead of time, and consider taking a book to keep yourself occupied. Remember to charge your devices fully before boarding.
• Arrive at the airport in plenty of time—even for short or domestic flights, it's advisable to arrive at least 1.5 to 2 hours before your departure time, allowing for traffic and security line delays.
• 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 Kelso

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 complimentary 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—aim to be at the airport at least 3 hours before your 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, enjoy a coffee at a café, 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 sleep schedule to align with your destination's time zone. Try to either sleep or stay awake during the flight according to the local time at your arrival destination to help mitigate jet lag.

Tips to find the cheapest flights to Kelso

The cheapest day to fly

Get started finding a cheap flight to Kelso 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

November is the cheapest month to fly to Kelso. 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 Kelso. 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 Kelso, 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 Kelso

The lowest price for round-trip flights to Kelso in 2026 starts from $78, while one-way tickets start from from $43. 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 Kelso. If you have a preferred departure time or airline, you can use the handy filters to customize your search.

The cheapest airlines flying to Kelso

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

The most affordable airports to fly into

To view the cheapest airports to fly into for Kelso, 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 Kelso. 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 Kelso 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 Kelso

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 Kelso.

Stopover savings

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