Cheap flights from St. Louis, MO to Seattle, WA

Flights starting at $83. Choose between Delta Air Lines, Alaska Airlines, or United Airlines to find the best price.

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Round trips

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One-way trips

St. Louis STLSeattle SEA

Alaska Airlines

$121

Updated:

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1707 miles
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Travelers usually depart from St. Louis Lambert International, or St. Louis Union Station when they travel from St. Louis to Seattle. Book your trip to arrive at Seattle–Tacoma International, Seattle, WA - King Street Station, Seattle, WA - Greyhound Station, Seattle, WA - University of Washington, or Seattle, WA - Poly Clinic. The distance between St. Louis and Seattle is 2747 km. The most popular airlines for this route are Delta Air Lines, Alaska Airlines, United Airlines, Frontier Airlines, and American Airlines. St. Louis and Seattle have 317 direct flights per week.

Weekly direct flights

MondaysTuesdaysWednesdaysThursdaysFridaysSaturdaysSundays
Direct flights2222222
Fly direct with

American Airlines on Mondays, Tuesdays, Wednesdays, Thursdays, Fridays, Saturdays, and Sundays.

Alaska Airlines on Mondays, Tuesdays, Wednesdays, Thursdays, Fridays, Saturdays, and Sundays.

Check-in for a flight from St. Louis to Seattle

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
Delta Air LinesDALDLYesOpens 24 days before flight
Closes 1 hours before flight
Alaska AirlinesASAASYesOpens 24 days before flight
Closes 1 hours before flight
United AirlinesUALUAYesNo
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight
American AirlinesAALAAYesNo

United States COVID-19 travel restrictions

Your trip summary

Most travelers from St Louis, STL can enter Seattle, SEA.

Departure

Additional information
  • Masks are recommended in certain settings

Information is provided as guidance only and accurate at the time of publishing. Always check government websites and airline materials before booking and traveling.

Learn more about COVID-19 restrictions in United States in our dedicated Stories article.

Frequently asked questions

How long does it take to travel from St. Louis to Seattle?
A one-way nonstop (direct) flight between St. Louis and Seattle takes around 4.7 hours.
What is the flight distance between St. Louis and Seattle?
The flight distance between St. Louis and Seattle is 2747 km.
What airlines offer nonstop (direct) flights between St. Louis and Seattle?
Several carriers operate flights between St. Louis and Seattle. Airlines offering nonstop (direct) flights include American Airlines, Alaska Airlines.
What are the most popular routes to and from St. Louis?
Travelers frequently search for route combinations, such as St. Louis and Las Vegas, Los Angeles, Denver, Orlando, Atlanta, Minneapolis, San Diego, San Francisco, London, Phoenix, Houston, Sacramento, New York, Cancún, Washington, D.C., Fort Lauderdale, Oakland, Tampa, Paris, Dallas.
What are the most popular routes to and from Seattle?
Travelers frequently search for route combinations, such as Seattle and Denver, Atlanta, Houston, Las Vegas, Austin, Orlando, Los Angeles, Salt Lake City, Mexico City, Paris, London, Washington, D.C., Detroit, New York, Minneapolis, Phoenix, Dallas, Raleigh, Charlotte, Cleveland.
What airports are near St. Louis?
The main airport in St. Louis is St. Louis Lambert International. It is also served by St. Louis Lambert International, General Wayne A. Downing Peoria International, Central Illinois Regional, Cape Girardeau Regional, Waynesville-St. Robert Regional, MidAmerica St. Louis, Barkley Regional, Evansville Regional, Williamson County Regional, Quincy Regional.
What airports are near Seattle?
The main airport in Seattle is Seattle–Tacoma International. It is also served by Portland International, Vancouver International, Bellingham International, Paine Field Everett, Abbotsford International, Vancouver Harbour Flight Centre, Pangborn Memorial, Victoria Inner Harbour SPB, Yakima Air Terminal, Friday Harbor Airport.
Is it possible to combine flights, buses, and trains in one itinerary when traveling between St. Louis and Seattle?
Yes, it's possible to combine different modes of transport between St. Louis and Seattle thanks to our Virtual Interlining technology. Making use of not only flights but also trains and buses between St. Louis and Seattle can give rise to new adventures. Read more about how Virtual Interlining works on Kiwi.com Stories.
What is Virtual Interlining and how do I use it?
Virtual Interlining provides a revolutionary way of traveling. You can combine different modes of transport like flights, trains, and buses into one itinerary. And this often saves money. Thanks to the world's largest carrier database, the Kiwi.com search function enables anyone to mix and match different modes of transport easily.
Which airlines fly between St. Louis and Seattle?
When's the best time to travel between St. Louis and Seattle?
What flights operate between St. Louis and Seattle?
How many airports are there near St. Louis?
How many airports are there near Seattle?
What time do nonstop (direct) flights between St. Louis and Seattle depart?
What time do nonstop (direct) flights between St. Louis and Seattle arrive?
What time do flights between St. Louis and Seattle depart?
What time do flights between St. Louis and Seattle arrive?

Planning a trip? Thanks to our Virtual Interlining algorithm, we offer billions of route combinations between any A and any B in the world by plane, train, and bus. Find the cheapest routes and best deals for you, as well as the best dates on which to travel.

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Flights from St. Louis

Flights to Seattle

Airports near St. Louis

Airports near Seattle

  • Seattle–Tacoma International
  • Portland International
  • Vancouver International
  • Bellingham International
  • Paine Field Everett
  • Victoria International
  • Abbotsford International
  • Nanaimo
  • Yakima Air Terminal
  • Pangborn Memorial
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