$94 Cheap Flights from St. Louis (STL) to Seattle (SEA)

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Cheap Flights from St. Louis to Seattle (STL-SEA)

Prices were available within the past 7 days and start at $94 for one-way flights and $159 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Spirit Airlines
American Airlines
Spirit Airlines
Frontier Airlines
Delta
Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Flights from St. Louis (STL) to Seattle (SEA)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Spirit Airlines, Sun Country Airlines, United
Roundtrip price
$158
Distance
1705 mi

St. Louis to Seattle Flights

Whether you’re looking for a grand adventure or just want to get away for a last-minute break, flights from St. Louis to Seattle offer the perfect respite. Not only does exploring Seattle provide the chance to make some magical memories, dip into delectable dishes, and tour the local landmarks, but the cheap airfare means you won’t bust your budget. So no matter whether your ideal itinerary involves flying one way, non-stop, or round trip, you’re bound to find flights that match your schedule on Expedia, and at prices that won’t shock your wallet.

Bagging a cheap flight from St. Louis to Seattle may mean more dollars to spend on for one-of-a-kind souvenirs when you arrive, but it doesn’t mean you have to skimp on your travel experience, as Expedia offers a sizzling selection of cheap airlines that’ll put you in your happy place on their planes, whether that’s getting lost in a hair-raising airport thriller, dreaming on the passing landscape over a glass of bubbly, or jotting down your vacation bucket list at 38,000 feet. There’s also bound to be plenty of opportunities to snap a few photos of the high life that will make your friends green with envy. After all, enjoying the journey is part of the fun.

With so many affordable flights and so many wonderful adventures awaiting you, there’s no reason to put off booking a fantastic flight from STL to SEA today. So don’t leave it to the last minute to make your dream trip a reality: pack your bags with your go-to travel accessories, put together your list of must-see attractions and can’t-miss activities, and get ready to broaden your horizons – with Expedia, the wonders of Seattle are only a plane trip away. Book your travel arrangements with us today!

If you would like to book flights to Seattle more flexibly many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to Seattle is $94 now!

Frequently asked questions

How long does it take to fly from Lambert Field to Sea-Tac Airport?
Alaska Airlines operates a direct flight taking off from STL at 3:35PM and reaching Sea-Tac Airport at 5:54PM — a travel time of 4 hours and 19 minutes. Secure a seat, pack something to keep you busy and the time will fly by.
Is it cheaper to buy a plane ticket from Lambert Field to Seattle - Tacoma Intl. Airport (SEA) last minute?
When it comes to booking your flights, being organized pays off. While it’s possible to find a last-minute deal on a Lambert-St. Louis Intl. Airport (STL) to Sea-Tac Airport flight, prices usually don’t get cheaper as the departure date nears. Based on flight pricing and demand studies in 2022, we have found that the sweet spot to lock in a domestic flight is between 28 – 35 days in advance. For international trips it’s between three and four months.
What airports do you fly into for Seattle from Central United States?
Seattle - Tacoma Intl. Airport (SEA), Renton Municipal Airport (RNT) and Boeing Field Airport (BFI) are your choices when taking off from Central United States to Seattle. Around 12 mi south of the center of Seattle, Seattle - Tacoma Intl. Airport (SEA) is the city’s major hub. Consider factors such as flight arrival and departure times and the distance to your hotel before choosing your airport. Space Needle and Pike Place Market are a couple of terrific attractions to put on your itinerary when you arrive.
What are the most popular departure times for flights from Lambert-St. Louis Intl. Airport (STL) to Sea-Tac Airport?
The most popular departure times for journeys from Lambert Field to Sea-Tac Airport are between 3:00 PM - 4:00 PM on Alaska Airlines. Our advice is to jet out in the morning. The earlier you set off, the greater your chances of a delay-free flight with less air traffic in the skies.
Can I change the date of my flight from STL to Seattle - Tacoma Intl. Airport (SEA)?
You can make changes to your St. Louis Lambert International Airport to SEA journey through the Expedia Trips portal. But before doing so, review the rules in your itinerary to see what you can do and what fees apply for changes. Some carriers have a change fee per person, in addition to any difference in fares. However, if you booked in the last 24 hours, you may be able to cancel for free and arrange new flights. You can also find your way to our Customer Service portal for more information and to connect with our Virtual Agent.
Seattle nearby Airports

Seattle Paine Field Intl. Airport

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