Cheap Flights from St. Louis to Seattle from CAD 88️ 2024

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Find St. Louis to Seattle flights starting at CAD 88.

Book one-way or return flights from St. Louis to Seattle from as little as CAD 88. Choose from the popular airlines below and book your flight today!

One way
Round-trip

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Searching for the best last minute flight from St. Louis to Seattle? Find one-way or return flights that are affordable and fit your itinerary.

Trip.com monitors the ticket fares of flights from St. Louis to Seattle. Stay updated on price trends and snag the best deals for your upcoming trip.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Find Cheapest Airlines Flying from St. Louis to Seattle

View airlines operating flights from St. Louis to Seattle. Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

American Airlines

From CAD 117

Spirit Airlines

From CAD 126

Alaska Airlines

From CAD 128

Delta Air Lines

From CAD 139

Frontier Airlines

From CAD 144

Sun Country Airlines

From CAD 189

United Airlines

From CAD 194

Southern Airways Express

From CAD 240

Southwest Airlines

From CAD 251

ANA airlines

Find more flights and airlines

Alternative Routes for St. Louis to Seattle Flights

Discover different routes, airlines, and transfers and find the best alternative flights for your journey from St. Louis to Seattle.

Cheapest
STL
22:44
10h 20m
1 transfer
SEA
07:04
St.Louis Lambert International Airport - Seattle-Tacoma International Airport
Tue, May 21Frontier Airlines
CAD 144
STL
22:44
10h 20m
1 transfer
SEA
07:04
St.Louis Lambert International Airport - Seattle-Tacoma International Airport
Tue, May 21Frontier Airlines
CAD 144
Find More Flights

How do I find the cheapest flights?

When are flight tickets from St. Louis (STL) to Seattle (SEA) the cheapest?
Airlines adjust prices for flights from St. Louis to Seattle based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.
How much are flights from St. Louis (STL) to Seattle (SEA) cost?
According to Trip.com's data, the lowest price is around CAD 521.
How long is the flight from St. Louis (STL) to Seattle (SEA)?
It takes about 5 hours 11 minutes to fly from St. Louis (STL) to Seattle (SEA).
What is the transportation method from the main airport to downtown in Seattle?
- The distance from Seattle-Tacoma International Airport to downtown is about 17km, by taxi about 30 minutes.
What are the most popular airlines that fly from St. Louis (STL) to Seattle (SEA)?
Airlines with flights from St. Louis (STL) to Seattle (SEA): Qatar Airways, Alaska Airlines, Air Tahiti Nui, American Airlines, United Airlines and Japan Airlines.
What's the most popular airline for direct flights from St. Louis (STL) to Seattle (SEA)?
Alaska Airlines operates 1 direct flights from St. Louis (STL) to Seattle (SEA).
How many airports in Seattle (SEA)?
There are 3 airport(s) in Seattle (SEA): King County (Boeing Field) International Airport, Lake Union Sea Plane Base and Seattle-Tacoma International Airport.

How to find a cheap flight from St. Louis to Seattle

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from St. Louis to Seattle. Book your flights at the right time and save more.

Book Early

Once prices are gone, they're gone. Lock in deals while you can!

Compare Flight Prices

Compare prices on travel agency and airline websites.

Look Out for Deals

Check airline and travel agency websites for latest flight deals

Check One-way Fares

Buying two cheap one-way flights can sometimes be a better deal than a round-trip.

Try Different Dates

Flying during the week, early in the morning, or late at night can help save money.

Use the Trip.com App

Save up to £10 per person when booking your flights on Trip.com

Flight Information for St. Louis to Seattle Flights

Cheapest direct flight price	CAD 87
Cheapest return ticket price	CAD 253
Cheapest month	December
Peak season for travel	October
Flight distance	2,765.15km
Average flight time	5 hours 11 minutes
Popular airline	American Airlines