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Cheap Flights from Seattle to St Louis, MO, United States - SEA to STL Last modified: May 30, 2016 1:47 AM

Popular flights from Seattle to St Louis Last modified: May 30, 2016 1:47 AM

We’ve got the inside scoop on finding the best time to fly for the best price. Not sure when to travel for your next vacation? Find details below on when-to-fly and when-to-buy.

Alaska Airlines
Departure Date Return Date Lowest Price
Aug 26, 2016 Aug 29, 2016 $347
Aug 26, 2016 Sep 10, 2016 $347
Aug 26, 2016 Sep 11, 2016 $347
Sep 1, 2016 Sep 4, 2016 $347
Sep 1, 2016 Sep 6, 2016 $347
American Airlines
Departure Date Return Date Lowest Price
Aug 26, 2016 Aug 29, 2016 $347
Aug 26, 2016 Sep 11, 2016 $347
Aug 26, 2016 Sep 10, 2016 $347
Sep 1, 2016 Sep 6, 2016 $347
Sep 1, 2016 Sep 5, 2016 $347
Frontier Airlines
Departure Date Return Date Lowest Price
Sep 9, 2016 Sep 11, 2016 $281
United Airlines
Departure Date Return Date Lowest Price
Aug 27, 2016 Sep 10, 2016 $372
Sep 1, 2016 Sep 4, 2016 $372
Sep 1, 2016 Sep 6, 2016 $372
Sep 6, 2016 Sep 10, 2016 $372
Sep 7, 2016 Sep 14, 2016 $372

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

We have collected flight cost data from across the web for travel from Seattle to St Louis, and have found the average flight price for this trip to be $375.

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

Airlines can adjust prices for plane tickets from Seattle to St Louis 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 Seattle to St Louis

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

Non Stop versus 1-Stop
Advanced PurchaseNon StopOne Stop
< 7 days $747 $424
7-14 days $461 $381
14-21 days $402 $393
21-30 days $402 $380
30-60 days $372 $375
60-90 days $347 $337
90+ days $347 $261

Cheapest Day To Fly from Seattle to St Louis

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

Monday Tuesday Wednesday Thursday Friday Saturday Sunday
$372 $372 $372 $390 $337 $359 $419

Lowest Fares Chart By Month from Seattle to St Louis

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

Month Origin Destination Carrier Depart Date Return Date Stops Price
May Seattle St Louis United 5/31/16 6/16/16 1 $646
June Seattle St Louis American 6/21/16 7/4/16 1 $380
July Seattle St Louis American 7/11/16 7/24/16 0 $372
August Seattle St Louis Frontier 8/26/16 9/11/16 1 $337
September Seattle St Louis Frontier 9/9/16 9/11/16 1 $281
October Seattle St Louis Frontier 10/6/16 10/11/16 1 $261
November Seattle St Louis American 11/1/16 11/8/16 0 $347
December Seattle St Louis American 12/19/16 1/8/17 0 $347

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

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 Seattle to St Louis.

Next 30 Days

SunMonTueWedThuFriSat
29 30 31 1 2 3 4
$822
5 6 7 8 9 10 11
$822 $532
12 13 14 15 16 17 18
$532
19 20 21 22 23 24 25
$457
26 27 28 29 30 1 2
$457 $497
3 4 5 6 7 8 9
$497
TIPSave $23 by flying into Moline instead of St Louis from Seattle

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

Your Seattle to St Louis 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 Seattle to St Louis is $391.

The average price for non-stop flights from Seattle to St Louis is $347.

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

Nonstop Flight Details from Seattle to St Louis
CarrierMonTueWedThuFriSatSunEarliest FlightLatest Flight
Alaska 2 2 2 2 2 2 2 11:40 18:10

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

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 Seattle to St Louis. 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 Seattle to St Louis is $183.

The average price for round trip flights from Seattle to St Louis is $381.

More Cheap Flights

FlightsAirlineLowest Price
Portland to St Louis American, Alaska, United $274
Vancouver to St Louis American, Air Canada, Alaska, Frontier, United, WestJet $294
Bellingham to St Louis American, Alaska $483
Victoria to St Louis American, Air Canada, Alaska, United, WestJet $518
Pasco to St Louis American, Alaska, United $438
Yakima to St Louis American, Alaska $487
Wenatchee to St Louis American, Alaska Check Dates
Seattle to Chicago American, Alaska, JetBlue, Frontier, Spirit, United, Virgin America $177
Seattle to Atlanta American, Alaska, Frontier, Spirit, United $311
Portland to Chicago American, Alaska, JetBlue, Frontier, Spirit, United, Virgin America $143
Seattle to Dallas - Ft Worth American, Alaska, Frontier, Spirit, Sun Country, United, Virgin America $235
Seattle to New York American, Alaska, JetBlue, Frontier, Sun Country, United, Virgin America $327
Vancouver to Chicago Pacific Coastal, American, Air Canada, Alaska, Frontier, Spirit, United, WestJet $373
Portland to Atlanta American, Alaska, Frontier, United $200
Portland to Dallas - Ft Worth American, Alaska, Frontier, Hawaiian, Spirit, United, Virgin America $157
Portland to New York American, Alaska, JetBlue, Frontier, Spirit, Sun Country, United, Virgin America $273
Seattle to Kansas City American, Alaska, Spirit, United $284
Seattle to Nashville American, Alaska, JetBlue, Frontier, United $244
Seattle to Minneapolis - St Paul American, Alaska, Frontier, Spirit, Sun Country, United $197
Seattle to Indianapolis American, Alaska, Frontier, United $244
Seattle to Detroit American, Alaska, JetBlue, Spirit, United $314
Vancouver to New York Pacific Coastal, American, Air Canada, Alaska, JetBlue, Cathay, United, Virgin America, Sunwing, WestJet $300
Seattle to Los Angeles American, Alaska, Spirit, United, Virgin America $115
Seattle to Denver American, Alaska, Frontier, United, Virgin America $148
Seattle to Houston American, Alaska, Frontier, Spirit, United $257
Seattle to Washington American, Alaska, JetBlue, Frontier, Sun Country, United, Virgin America $244
Seattle to Memphis American, Alaska, Allegiant, United $320
Seattle to Springfield American, United $430
Seattle to Charlotte American, Alaska, JetBlue, Frontier, United $266
Seattle to Milwaukee American, Alaska, Frontier, United $278

Airlines Flying from Seattle to St Louis (SEA to STL) Number of flights searched: 223Last modified: May 30, 2016 1:47 AM

Below are the different airlines that fly from Seattle to St Louis 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 Seattle to St Louis.

Seattle to St Louis
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
Frontier DEN X
United SFO X X X X X X X
Southwest - X X X X X X X
Southwest MCI X X X X X X X

Airports for Your Route

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

Seattle to St Louis Flight Questions

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

Question: How long is a direct flight from Seattle to St Louis?
Answer: The average Seattle to St Louis flight time is 3 hours and 49 minutes.
Question: How many miles are there between Seattle and St Louis?
Answer: The distance from Seattle to St Louis is 1704 miles.
Question: How common are direct flights from Seattle to St Louis?
Answer: There are 14 direct flights from Seattle to St Louis.
Question: What is the most popular airline for non-stop flights from Seattle to St Louis?
Answer: Alaska Airlines provides 100% of the non-stop flights between Seattle and St Louis.
Question: What are the most popular connecting cities when flying from Seattle to St Louis?
Answer: Denver, CO
Seattle (SEA) To St Louis, MO (STL) Flights: Cheap Flights From Seattle To St Louis | FareCompare.