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Cheap Flights from Seattle to St Louis, MO, United States - SEA to STL

Popular flights from Seattle to St Louis

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
May 25, 2016 Jun 7, 2016 $255
May 31, 2016 Jun 7, 2016 $255
Jun 4, 2016 Jun 7, 2016 $255
American Airlines
Departure Date Return Date Lowest Price
Jun 4, 2016 Jun 7, 2016 $264
Frontier Airlines
Departure Date Return Date Lowest Price
Jun 4, 2016 Jun 15, 2016 $428
Aug 3, 2016 Aug 17, 2016 $428
United Airlines
Departure Date Return Date Lowest Price
May 25, 2016 Jun 7, 2016 $264
May 31, 2016 Jun 7, 2016 $264
Jun 4, 2016 Jun 7, 2016 $264

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 $263.

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 $601 $285
7-14 days $382 $285
14-21 days $299 $265
21-30 days $317 $255
30-60 days $299 $255
60-90 days $366 $274
90+ days $338 $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
$265 $255 $255 $269 $274 $255 $274

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 Alaska 5/25/16 6/7/16 1 $255
June Seattle St Louis Alaska 6/4/16 6/7/16 1 $255
July Seattle St Louis American 7/13/16 7/20/16 1 $274
August Seattle St Louis American 8/2/16 8/9/16 1 $274
September Seattle St Louis Frontier 9/21/16 9/27/16 1 $261
October Seattle St Louis Frontier 10/6/16 10/11/16 1 $261
November Seattle St Louis Alaska 11/8/16 11/9/16 1 $274
December Seattle St Louis American 12/15/16 12/19/16 1 $332

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
1 2 3 4 5 6 7
$1,031
8 9 10 11 12 13 14
$1,031 $489
15 16 17 18 19 20 21
$489 $429
22 23 24 25 26 27 28
$429 $479
29 30 31 1 2 3 4
$479 $299
5 6 7 8 9 10 11
$299

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 $305.

The average price for non-stop flights from Seattle to St Louis is $320.

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 11:55 18:05

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 $144.

The average price for round trip flights from Seattle to St Louis is $305.

More Cheap Flights

FlightsAirlineLowest Price
Portland to St Louis American, Alaska, United $274
Vancouver to St Louis American, Air Canada, Alaska, Frontier, United, WestJet $303
Bellingham to St Louis American, Alaska $456
Victoria to St Louis American, Air Canada, Alaska, United, WestJet Check Dates
Pasco to St Louis American, Alaska, United $401
Yakima to St Louis American, Alaska $506
Wenatchee to St Louis American, Alaska $464
Seattle to Chicago American, Alaska, JetBlue, Frontier, Spirit, United, Virgin America $196
Seattle to Atlanta American, Alaska, Frontier, Spirit, United $366
Portland to Chicago American, Alaska, JetBlue, Frontier, Spirit, United, Virgin America $97
Seattle to Dallas - Ft Worth American, Alaska, Frontier, Spirit, Sun Country, United, Virgin America $224
Seattle to New York American, Alaska, JetBlue, Frontier, Hawaiian, Sun Country, United, Virgin America $303
Vancouver to Chicago Pacific Coastal, American, Air Canada, Alaska, Frontier, Spirit, United, WestJet $376
Portland to Atlanta American, Alaska, Frontier, United $290
Portland to Dallas - Ft Worth American, Alaska, Frontier, Hawaiian, Spirit, United, Virgin America $117
Portland to New York American, Alaska, JetBlue, Frontier, Spirit, Sun Country, United, Virgin America $272
Seattle to Kansas City American, Alaska, Spirit, United $260
Seattle to Nashville American, Alaska, JetBlue, Frontier, United $276
Seattle to Minneapolis - St Paul American, Alaska, Frontier, Spirit, Sun Country, United $137
Seattle to Indianapolis American, Alaska, Frontier, United $278
Seattle to Detroit American, Alaska, JetBlue, Spirit, United $313
Vancouver to New York Pacific Coastal, American, Air Canada, Alaska, JetBlue, Cathay, Spirit, Sun Country, United, Virgin America, WestJet, Great Lakes $315
Seattle to Los Angeles American, Alaska, Spirit, United, Virgin America $106
Seattle to Denver American, Alaska, Frontier, Spirit, United, Virgin America $128
Seattle to Houston American, Alaska, Frontier, Spirit, United $265
Seattle to Washington American, Alaska, JetBlue, Frontier, Sun Country, United, Virgin America $286
Seattle to Memphis American, Alaska, United $275
Seattle to Springfield American, United $423
Seattle to Charlotte American, Alaska, JetBlue, Frontier, United $295
Seattle to Milwaukee American, Alaska, Frontier, United $272

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

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 PHX 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 MSP X X X X X X X
United ORD X X X X X X X
Southwest - 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 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 52 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.