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St. Louis to Seattle-Tacoma International Airport flight
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Cheap Flights from St. Louis to Seattle-Tacoma International Airport

  • One way
  • Return
sortSort: Price (Lowest)
  • Sort: Price (Lowest)
  • Sort: Departure (Earliest)
      • STL20:02
        15h 8m
        1 stop
        SEA09:10
        St. Louis - Seattle|Sat, Jun 8|Frontier Airlines
        US$ 65US$ 121
        46% OFF
        46% OFF
        US$ 121US$ 65
      • STL20:04
        14h 26m
        1 stop
        SEA08:30
        St. Louis - Seattle|Wed, May 29|Frontier Airlines
        US$ 76US$ 121
        37% OFF
        37% OFF
        US$ 121US$ 76
      • STL22:44
        10h 50m
        1 stop
        SEA07:34
        St. Louis - Seattle|Tue, May 28|Frontier Airlines
        US$ 78US$ 121
        36% OFF
        36% OFF
        US$ 121US$ 78
      • STL21:53
        13h 51m
        1 stop
        SEA09:44
        St. Louis - Seattle|Mon, May 13|Frontier Airlines
        US$ 79
        US$ 79
      • STL20:02
        15h 10m
        1 stop
        SEA09:12
        St. Louis - Seattle|Sat, Jun 15|Frontier Airlines
        US$ 87
        US$ 87
      • STL15:47
        7h 8m
        1 stop
        SEA20:55
        St. Louis - Seattle|Tue, Jun 18|Frontier Airlines
        US$ 92
        US$ 92
      • STL19:29
        15h 3m
        1 stop
        SEA08:32
        St. Louis - Seattle|Tue, Jun 11|Frontier Airlines
        US$ 92
        US$ 92
      • STL13:55
        8h 14m
        1 stop
        SEA20:09
        St. Louis - Seattle|Wed, Jun 5|Spirit Airlines
        US$ 94
        US$ 94
      • STL19:23
        28h 49m
        1 stop
        SEA22:12
        St. Louis - Seattle|Wed, May 22|Frontier Airlines
        US$ 95
        US$ 95
      • STL20:22
        14h 19m
        1 stop
        SEA08:41
        St. Louis - Seattle|Mon, Jun 17|Frontier Airlines
        US$ 97
        US$ 97
      • STL13:00
        3h 5m
        Direct
        SEA14:00
        St. Louis - Seattle|Mon, May 20|Frontier Airlines
        Find More Flights
        Find More Flights

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

Selected Airlines from St. Louis to Seattle-Tacoma International Airport
Frontier Airlines
From US$ 65
Spirit Airlines
From US$ 94
American Airlines
From US$ 100
Alaska Airlines
From US$ 113
Sun Country Airlines
From US$ 139
United Airlines
From US$ 149
Southern Airways Express
From US$ 169
Southwest Airlines
From US$ 333
Delta Air Lines
From US$ 414
ANA airlines
Find more flights and airlines

Airports in St. Louis

  • 21.12 km from central St. Louis
    St.Louis Lambert International Airport
    Tickets From
    US$ 65
Flight Schedule from St. Louis to Seattle-Tacoma International Airport
Flight info.
Departure
Arrival
Weekly Schedule

  1. SY1626

    Sun Country Airlines

    06:45

    STL

    1.7h

    08:26

    MSP

    ------S
    Search

  2. SY285

    Sun Country Airlines

    14:40

    MSP

    3.9h

    16:32

    SEA

    S-TWT-S

  3. AS473

    Alaska Airlines

    07:00

    STL

    4.4h

    Direct

    09:25

    SEA

    SMTWTFS
    Search

  4. AA1410

    American Airlines

    07:01

    STL

    1.9h

    08:57

    DFW

    SMTWTFS
    Search

  5. AA757

    American Airlines

    12:24

    DFW

    4.2h

    14:36

    SEA

    SMTWTFS

  6. AA4794

    American Airlines

    12:44

    STL

    1.3h

    14:03

    ORD

    SMTWTFS
    Search

  7. AA2368

    American Airlines

    20:47

    ORD

    4.6h

    23:24

    SEA

    SMTWTFS

  8. AS388

    Alaska Airlines

    14:35

    STL

    4.4h

    Direct

    17:00

    SEA

    SMT-TFS
    Search

  9. F93301

    Frontier Airlines

    15:53

    STL

    2.4h

    17:17

    DEN

    -M-----
    Search

  10. AS705

    Alaska Airlines

    20:06

    DEN

    2.9h

    22:00

    SEA

    -MT----

  11. AS349

    Alaska Airlines

    19:41

    STL

    4.3h

    Direct

    22:00

    SEA

    S--WTFS
    Search

  12. F94477

    Frontier Airlines

    22:32

    STL

    2.5h

    00:01

    DEN

    ---W--S
    Search

  13. F91175

    Frontier Airlines

    07:31

    DEN

    3.0h

    09:28

    SEA

    S--WTFS

  14. F93367

    Frontier Airlines

    23:41

    STL

    3.3h

    00:59

    PHX

    S---TF-
    Search

  15. AS611

    Alaska Airlines

    06:00

    PHX

    3.0h

    09:02

    SEA

    SMTWTFS

  16. F93367

    Frontier Airlines

    23:41

    STL

    3.3h

    00:59

    PHX

    S---TF-
    Search

  17. F91723

    Frontier Airlines

    15:30

    PHX

    3.1h

    18:37

    SEA

    ---WTFS
Find more flights and airlines

Flight Info of Flights from St. Louis to Seattle-Tacoma International Airport

Cheapest return ticket price

US$ 193

Cheapest direct flight price

US$ 65

Off-season for travel

January

Peak season for travel

August

FAQs for St. Louis to Seattle-Tacoma International Airport Flights

  • When are flight 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 lowest 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 US$ 406.

  • How long is the flights from St. Louis (STL) to Seattle (SEA)?

    It takes about 4 hours 57 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, American Airlines, Air Tahiti Nui, 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)?

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