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Cheap Flights from St Louis to Seattle - STL to SEA

Popular flights from St Louis to Seattle

If your flight days are flexible and you looking for a good deal, our charts on cheap flights provide some insight regarding affordable flight options for your next big adventure.

Alaska Airlines
Departure Date Return Date Lowest Price
Mar 5, 2016 Mar 9, 2016 $245
American Airlines
Departure Date Return Date Lowest Price
Mar 5, 2016 Mar 9, 2016 $256
Apr 7, 2016 Apr 10, 2016 $256
Frontier Airlines
Departure Date Return Date Lowest Price
Feb 23, 2016 Mar 1, 2016 $233
United Airlines
Departure Date Return Date Lowest Price
Mar 5, 2016 Mar 9, 2016 $253

How Much Does it Cost to Fly from St Louis to Seattle (STL to SEA)?

We have collected flight cost data from across the web for travel from St Louis to Seattle, and have found the average flight price for this trip to be $248.

When Can I Buy the Cheapest Flight from St Louis to Seattle (STL to SEA)?

Airlines can adjust prices for plane tickets from St Louis to Seattle based on the day and time that you decide to book your flight. We have collected data from all airlines, and have discovered that the best days to book flights are Tuesdays, Wednesdays, and Saturdays. Read our article to find more information about the best time to buy airline tickets.

How far in advance should you book flights from St Louis to Seattle

The chart below shows up-to-date information regarding how far in advance a flight from St Louis to Seattle should be booked.

Non Stop versus 1-Stop
Advanced PurchaseNon StopOne Stop
< 7 days $684 $427
7-14 days $396 $280
14-21 days $253 $233
21-30 days $245 $248
30-60 days $253 $248
60-90 days $253 $255
90+ days $288 $272

Cheapest Day To Fly from St Louis to Seattle

The chart below shows up-to-date information regarding the cheapest days to fly from St Louis to Seattle.

Monday Tuesday Wednesday Thursday Friday Saturday Sunday
$253 $233 $253 $248 $248 $245 $261

Lowest Fares Chart By Month from St Louis to Seattle

The chart below shows the lowest fare by month when flying from St Louis to Seattle.

Month Origin Destination Carrier Depart Date Return Date Stops Price
February St Louis Seattle Frontier 2/23/16 3/1/16 1 $233
March St Louis Seattle Alaska 3/5/16 3/9/16 0 $245
April St Louis Seattle Alaska 4/2/16 4/6/16 0 $253
May St Louis Seattle United 5/7/16 5/11/16 1 $272
June St Louis Seattle United 6/1/16 6/8/16 1 $305
July St Louis Seattle United 7/26/16 8/5/16 1 $326
August St Louis Seattle United 8/27/16 9/3/16 1 $280
September St Louis Seattle United 9/7/16 9/12/16 1 $280

Cheapest Weekend Non-Stop Flights for the Next 30 Days from St Louis to Seattle

If you're ready to take a trip in the next 30 days and want to fly on the weekend, you might be wondering which weekend is the cheapest to fly. The chart below shows up-to-date data regarding weekend flight prices from St Louis to Seattle.

Next 30 Days

SunMonTueWedThuFriSat
7 8 9 10 11 12 13
$684
14 15 16 17 18 19 20
$684 $646
21 22 23 24 25 26 27
$646 $352
28 29 1 2 3 4 5
$352 $275
6 7 8 9 10 11 12
$275 $385
13 14 15 16 17 18 19
$385

Non-Stop vs Connecting Flights from St Louis to Seattle (STL to SEA)

Your St Louis to Seattle flight can be significantly cheaper by choosing a multi-stop airline ticket. Although these connecting flights sacrifice some convenience, on average, travelers save 20%-60% when they choose to fly multi-stop versus a direct flight.

The average price for connecting flights from St Louis to Seattle is $252.

The average price for non-stop flights from St Louis to Seattle is $268.

The chart below shows up to date information regarding non-stop flights from St Louis to Seattle.

Nonstop Flight Details from St Louis to Seattle
CarrierMonTueWedThuFriSatSunEarliest FlightLatest Flight
Alaska 1 1 1 1 1 1 1 18:45 18:45

Round Trip vs One Way Flights from St Louis to Seattle (STL to SEA)

We have found that there is often no price difference between buying a round trip flight versus a one way flight. Increased flexibility is the main benefit when it comes to buying a one way flight from St Louis to Seattle. However, booking a round trip flight can be a simpler process. You can compare round trip and one way flights by using our flight comparison.

The average price for one way flights from St Louis to Seattle is $128.

The average price for round trip flights from St Louis to Seattle is $250.

More Cheap Flights

FlightsAirlineLowest Price
Springfield to Seattle Alaska, Delta, United, American $462
Moline to Seattle Alaska, United, Delta, US Airways, American $349
Peoria to Seattle United, Delta, US Airways, American $352
Evansville to Seattle Delta, American $462
Bloomington - Normal to Seattle Delta, American, Frontier $352
Springfield to Seattle United, American $417
Champaign to Seattle American $355
St Louis to Portland Delta, United, Alaska, US Airways, American, Frontier $237
St Louis to Vancouver Air Canada, United, Delta, Alaska, US Airways, American, WestJet $289
St Louis to Las Vegas Alaska, United, Delta, US Airways, American, Frontier, AirTran $106
St Louis to Victoria Air Canada, United, Delta, Alaska, American, WestJet $430
St Louis to Los Angeles Alaska, United, Delta, US Airways, American, Frontier, AirTran $244
St Louis to San Francisco Alaska, United, Delta, US Airways, American, Frontier, AirTran $237
Springfield to Portland Alaska, Delta, United, US Airways, American $452
Moline to Portland Alaska, United, Delta, US Airways, American $362
St Louis to Bellingham Delta, Alaska, American, Frontier $384
Bloomington - Normal to Portland Delta, American, Frontier $632
Springfield to Vancouver United, Alaska, Delta, American $408
St Louis to Chicago Alaska, United, Delta, US Airways, American, Air Choice One $208
Moline to Vancouver United, Delta, Alaska, American $414
St Louis to Dallas - Ft Worth United, Delta, American, Frontier $208
Peoria to Vancouver United, Delta, US Airways, American $381
Peoria to Portland United, Delta, US Airways, American $356
Evansville to Portland Delta, American $462
St Louis to Denver Alaska, United, Delta, US Airways, American, Frontier, AirTran $108
St Louis to Phoenix Alaska, United, Delta, US Airways, American, Frontier, AirTran $208
St Louis to Wenatchee Delta, Alaska Check Dates
St Louis to Atlanta United, Delta, US Airways, American, AirTran $106
Champaign to Portland American $485
Springfield to Portland United, American $352

Airlines Flying from St Louis to Seattle (STL to SEA)

Below are the different airlines that fly from St Louis to Seattle with the average price of their plane tickets. Just remember that different airlines offer different levels of comfort and service, so consider convenience when choosing your airline.

Below is the full flight schedule summary of the next 30 days for flights from St Louis to Seattle.

St Louis to Seattle
Airline Connections Mon Tue Wed Thu Fri Sat Sun
American ORD X X X X X X X
Alaska - X X X X X X X
Alaska PDX X X X X X X X
Delta ATL X X X X X X X
United SFO X X X X X X X
Southwest DEN X X X X X X X

Airports for Your Route

These pages contain information about the major airports in St Louis and Seattle, so you can feel comfortable knowing how to get around whether you are about to take off or you just landed.

St Louis to Seattle Flight Questions

Below are some common questions that asked about this flight route:

Question: How long is a direct flight from St Louis to Seattle?
Answer: The average St Louis to Seattle flight time is 4 hours and 40 minutes.
Question: How many miles are there between St Louis and Seattle?
Answer: The distance from St Louis to Seattle is 1704 miles.
Question: How common are direct flights from St Louis to Seattle?
Answer: There are 7 direct flights from St Louis to Seattle.
Question: What is the most popular airline for non-stop flights from St Louis to Seattle?
Answer: Alaska Airlines provides 100% of the non-stop flights between St Louis and Seattle.
Question: What are the most popular connecting cities when flying from St Louis to Seattle?
Answer: Denver, CO
St Louis (STL) To Seattle (SEA) Flights: Cheap Flights From St Louis To Seattle | FareCompare.