All airlines flying from Saint Louis (STL) to Seattle-Tacoma (SEA).

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Sun 13:35 Saint Louis (STL) 2 15:55 Seattle-Tacoma (SEA)
Southwest Airlines WN 170 Non-stop Boeing 737-700 (73W) 4:20 Operates only on 2025-08-31
Mon-Sat 19:32 Saint Louis (STL) 1 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 291 Non-stop Boeing 737 MAX 9 (7M9) 4:28 Effective 2025-06-12 through 2025-06-21
Sun 19:32 Saint Louis (STL) 1 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 291 Non-stop Boeing 737 (73J) 4:28 Operates only on 2025-06-15
Daily 19:32 Saint Louis (STL) 1 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 291 Non-stop Boeing 737 MAX 9 (7M9) 4:28 Effective 2025-06-22 through 2025-06-29
Mon,Tue 19:32 Saint Louis (STL) 1 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 291 Non-stop Boeing 737 (73J) 4:28 Effective 2025-06-30 through 2025-07-01
Mon,Wed,Thu,Sat,Sun 19:32 Saint Louis (STL) 1 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 291 Non-stop Boeing 737 MAX 9 (7M9) 4:28 Effective 2025-07-02 through 2025-07-10
Mon,Tue 19:32 Saint Louis (STL) 1 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 291 Non-stop Boeing 737 (73J) 4:28 Effective 2025-07-08 through 2025-07-14
Tue-Sun 19:32 Saint Louis (STL) 1 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 291 Non-stop Boeing 737 MAX 9 (7M9) 4:28 Effective 2025-07-11 through 2025-07-20
Mon,Tue 19:32 Saint Louis (STL) 1 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 291 Non-stop Boeing 737 (73J) 4:28 Effective 2025-07-21 through 2025-07-29
Wed-Sun 19:32 Saint Louis (STL) 1 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 291 Non-stop Boeing 737 MAX 9 (7M9) 4:28 Effective 2025-07-23 through 2025-08-03
Mon,Wed-Sun 19:32 Saint Louis (STL) 1 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 291 Non-stop Boeing 737 MAX 9 (7M9) 4:28 Effective 2025-08-04 through 2025-08-18
Tue 19:32 Saint Louis (STL) 1 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 291 Non-stop Boeing 737 (73J) 4:28 Effective 2025-08-05 through 2025-08-12
Tue 19:32 Saint Louis (STL) 1 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 291 Non-stop Boeing 737 MAX 9 (7M9) 4:28 Operates only on 2025-08-19
Daily 19:36 Saint Louis (STL) 1 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 291 Non-stop Boeing 737 (73J) 4:24 Effective 2025-08-20 through 2025-10-03
Daily 15:03 Saint Louis (STL) 1 17:32 Seattle-Tacoma (SEA)
Alaska Airlines AS 315 Non-stop Boeing 737 MAX 9 (7M9) 4:29 Effective 2025-05-15 through 2025-06-11
Daily 14:55 Saint Louis (STL) 1 17:21 Seattle-Tacoma (SEA)
Alaska Airlines AS 388 Non-stop Boeing 737 (73J) 4:26 Effective from 2025-10-04
Mon,Tue,Fri 15:08 Saint Louis (STL) 1 17:39 Seattle-Tacoma (SEA)
Alaska Airlines AS 388 Non-stop Boeing 737 MAX 9 (7M9) 4:31 Valid until 2025-05-06
Wed,Thu,Sat,Sun 15:08 Saint Louis (STL) 1 17:39 Seattle-Tacoma (SEA)
Alaska Airlines AS 388 Non-stop Boeing 737 (73J) 4:31 Valid until 2025-05-07
Tue,Thu 15:08 Saint Louis (STL) 1 17:39 Seattle-Tacoma (SEA)
Alaska Airlines AS 388 Non-stop Boeing 737 MAX 9 (7M9) 4:31 Effective 2025-05-08 through 2025-05-13
Mon,Wed,Fri-Sun 15:08 Saint Louis (STL) 1 17:39 Seattle-Tacoma (SEA)
Alaska Airlines AS 388 Non-stop Boeing 737 (73J) 4:31 Effective 2025-05-09 through 2025-05-14
Daily 15:17 Saint Louis (STL) 1 17:41 Seattle-Tacoma (SEA)
Alaska Airlines AS 388 Non-stop Boeing 737 (73J) 4:24 Effective 2025-08-20 through 2025-10-03
Tue-Thu,Sun 15:24 Saint Louis (STL) 1 17:50 Seattle-Tacoma (SEA)
Alaska Airlines AS 388 Non-stop Boeing 737 MAX 9 (7M9) 4:26 Effective 2025-06-12 through 2025-06-19
Mon,Fri,Sat 15:24 Saint Louis (STL) 1 17:50 Seattle-Tacoma (SEA)
Alaska Airlines AS 388 Non-stop Boeing 737 (73J) 4:26 Effective 2025-06-13 through 2025-06-20
Tue-Thu,Sat,Sun 15:24 Saint Louis (STL) 1 17:50 Seattle-Tacoma (SEA)
Alaska Airlines AS 388 Non-stop Boeing 737 MAX 9 (7M9) 4:26 Effective 2025-06-21 through 2025-06-26
Mon,Fri,Sat 15:24 Saint Louis (STL) 1 17:50 Seattle-Tacoma (SEA)
Alaska Airlines AS 388 Non-stop Boeing 737 (73J) 4:26 Effective 2025-06-23 through 2025-06-30
Tue-Sun 15:24 Saint Louis (STL) 1 17:50 Seattle-Tacoma (SEA)
Alaska Airlines AS 388 Non-stop Boeing 737 MAX 9 (7M9) 4:26 Effective 2025-06-29 through 2025-07-10
Mon,Fri,Sat 15:24 Saint Louis (STL) 1 17:50 Seattle-Tacoma (SEA)
Alaska Airlines AS 388 Non-stop Boeing 737 (73J) 4:26 Effective 2025-07-07 through 2025-07-12
Mon-Thu,Sun 15:24 Saint Louis (STL) 1 17:50 Seattle-Tacoma (SEA)
Alaska Airlines AS 388 Non-stop Boeing 737 MAX 9 (7M9) 4:26 Effective 2025-07-13 through 2025-07-27
Fri,Sat 15:24 Saint Louis (STL) 1 17:50 Seattle-Tacoma (SEA)
Alaska Airlines AS 388 Non-stop Boeing 737 (73J) 4:26 Effective 2025-07-18 through 2025-07-26
Mon,Fri,Sat 15:24 Saint Louis (STL) 1 17:50 Seattle-Tacoma (SEA)
Alaska Airlines AS 388 Non-stop Boeing 737 (73J) 4:26 Effective 2025-07-28 through 2025-08-02
Mon-Thu,Sun 15:24 Saint Louis (STL) 1 17:50 Seattle-Tacoma (SEA)
Alaska Airlines AS 388 Non-stop Boeing 737 MAX 9 (7M9) 4:26 Effective 2025-07-29 through 2025-08-19
Fri 15:24 Saint Louis (STL) 1 17:50 Seattle-Tacoma (SEA)
Alaska Airlines AS 388 Non-stop Boeing 737-900 (739) 4:26 Operates only on 2025-08-08
Fri,Sat 15:24 Saint Louis (STL) 1 17:50 Seattle-Tacoma (SEA)
Alaska Airlines AS 388 Non-stop Boeing 737 (73J) 4:26 Effective 2025-08-09 through 2025-08-16
Mon-Thu,Sat,Sun 06:30 Saint Louis (STL) 1 08:54 Seattle-Tacoma (SEA)
Alaska Airlines AS 473 Non-stop Boeing 737 MAX 9 (7M9) 4:24 Valid until 2025-05-01
Daily 06:30 Saint Louis (STL) 1 08:54 Seattle-Tacoma (SEA)
Alaska Airlines AS 473 Non-stop Boeing 737 MAX 9 (7M9) 4:24 Effective 2025-05-02 through 2025-05-14
Daily 06:30 Saint Louis (STL) 1 09:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 473 Non-stop Boeing 737 (73J) 4:30 Effective 2025-08-20 through 2025-10-03
Daily 06:41 Saint Louis (STL) 1 09:10 Seattle-Tacoma (SEA)
Alaska Airlines AS 473 Non-stop Boeing 737 (73J) 4:29 Effective 2025-06-12 through 2025-07-11
Sat 06:41 Saint Louis (STL) 1 09:10 Seattle-Tacoma (SEA)
Alaska Airlines AS 473 Non-stop Boeing 737 MAX 9 (7M9) 4:29 Operates only on 2025-07-12
Daily 06:41 Saint Louis (STL) 1 09:10 Seattle-Tacoma (SEA)
Alaska Airlines AS 473 Non-stop Boeing 737 (73J) 4:29 Effective 2025-07-13 through 2025-07-21
Tue,Fri 06:41 Saint Louis (STL) 1 09:10 Seattle-Tacoma (SEA)
Alaska Airlines AS 473 Non-stop Boeing 737 MAX 9 (7M9) 4:29 Effective 2025-07-22 through 2025-07-25
Mon-Thu,Sat,Sun 06:41 Saint Louis (STL) 1 09:10 Seattle-Tacoma (SEA)
Alaska Airlines AS 473 Non-stop Boeing 737 (73J) 4:29 Effective 2025-07-23 through 2025-08-07
Fri 06:41 Saint Louis (STL) 1 09:10 Seattle-Tacoma (SEA)
Alaska Airlines AS 473 Non-stop Boeing 737 MAX 9 (7M9) 4:29 Operates only on 2025-08-01
Daily 06:41 Saint Louis (STL) 1 09:10 Seattle-Tacoma (SEA)
Alaska Airlines AS 473 Non-stop Boeing 737 (73J) 4:29 Effective 2025-08-08 through 2025-08-19
Daily 07:00 Saint Louis (STL) 1 09:26 Seattle-Tacoma (SEA)
Alaska Airlines AS 473 Non-stop Boeing 737 (73J) 4:26 Effective 2025-10-04 through 2026-01-06
Daily 07:00 Saint Louis (STL) 1 09:26 Seattle-Tacoma (SEA)
Alaska Airlines AS 473 Non-stop Boeing 737 (73J) 4:26 Effective from 2026-02-12
Daily 18:18 Saint Louis (STL) 1 20:45 Seattle-Tacoma (SEA)
Alaska Airlines AS 503 Non-stop Boeing 737 MAX 9 (7M9) 4:27 Effective 2025-06-01 through 2025-06-10
Thu,Fri 18:22 Saint Louis (STL) 1 20:50 Seattle-Tacoma (SEA)
Alaska Airlines AS 503 Non-stop Boeing 737 (73J) 4:28 Effective 2025-05-15 through 2025-05-16
Daily 18:22 Saint Louis (STL) 1 20:50 Seattle-Tacoma (SEA)
Alaska Airlines AS 503 Non-stop Boeing 737 MAX 9 (7M9) 4:28 Effective 2025-05-17 through 2025-05-25
Mon 18:22 Saint Louis (STL) 1 20:50 Seattle-Tacoma (SEA)
Alaska Airlines AS 503 Non-stop Boeing 737 (73J) 4:28 Operates only on 2025-05-26
Tue-Sat 18:22 Saint Louis (STL) 1 20:50 Seattle-Tacoma (SEA)
Alaska Airlines AS 503 Non-stop Boeing 737 MAX 9 (7M9) 4:28 Effective 2025-05-27 through 2025-05-31
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FlightMapper.net Flight Search Countries Airlines
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All airlines flying from Saint Louis (STL) to Seattle-Tacoma (SEA).
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN170
13:35
Saint Louis (STL) 2

15:55
Seattle-Tacoma (SEA)
Operates only on 2025-08-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 4:20, non-stop
Boeing 737-700 (73W)
Alaska Airlines AS291
19:32
Saint Louis (STL) 1

22:00
Seattle-Tacoma (SEA)
Effective 2025-06-12 through 2025-06-21
Mon
Tue
Wed
Thu
Fri
Sat
Sun
-
Duration: 4:28, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS291
19:32
Saint Louis (STL) 1

22:00
Seattle-Tacoma (SEA)
Operates only on 2025-06-15
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 4:28, non-stop
Boeing 737 (73J)
Alaska Airlines AS291
19:32
Saint Louis (STL) 1

22:00
Seattle-Tacoma (SEA)
Effective 2025-06-22 through 2025-06-29
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:28, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS291
19:32
Saint Louis (STL) 1

22:00
Seattle-Tacoma (SEA)
Effective 2025-06-30 through 2025-07-01
Mon
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 4:28, non-stop
Boeing 737 (73J)
Alaska Airlines AS291
19:32
Saint Louis (STL) 1

22:00
Seattle-Tacoma (SEA)
Effective 2025-07-02 through 2025-07-10
Mon
Tue
-
Wed
Thu
Fri
-
Sat
Sun
Duration: 4:28, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS291
19:32
Saint Louis (STL) 1

22:00
Seattle-Tacoma (SEA)
Effective 2025-07-08 through 2025-07-14
Mon
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 4:28, non-stop
Boeing 737 (73J)
Alaska Airlines AS291
19:32
Saint Louis (STL) 1

22:00
Seattle-Tacoma (SEA)
Effective 2025-07-11 through 2025-07-20
Mon
-
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:28, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS291
19:32
Saint Louis (STL) 1

22:00
Seattle-Tacoma (SEA)
Effective 2025-07-21 through 2025-07-29
Mon
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 4:28, non-stop
Boeing 737 (73J)
Alaska Airlines AS291
19:32
Saint Louis (STL) 1

22:00
Seattle-Tacoma (SEA)
Effective 2025-07-23 through 2025-08-03
Mon
-
Tue
-
Wed
Thu
Fri
Sat
Sun
Duration: 4:28, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS291
19:32
Saint Louis (STL) 1

22:00
Seattle-Tacoma (SEA)
Effective 2025-08-04 through 2025-08-18
Mon
Tue
-
Wed
Thu
Fri
Sat
Sun
Duration: 4:28, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS291
19:32
Saint Louis (STL) 1

22:00
Seattle-Tacoma (SEA)
Effective 2025-08-05 through 2025-08-12
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 4:28, non-stop
Boeing 737 (73J)
Alaska Airlines AS291
19:32
Saint Louis (STL) 1

22:00
Seattle-Tacoma (SEA)
Operates only on 2025-08-19
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 4:28, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS291
19:36
Saint Louis (STL) 1

22:00
Seattle-Tacoma (SEA)
Effective 2025-08-20 through 2025-10-03
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:24, non-stop
Boeing 737 (73J)
Alaska Airlines AS315
15:03
Saint Louis (STL) 1

17:32
Seattle-Tacoma (SEA)
Effective 2025-05-15 through 2025-06-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:29, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS388
14:55
Saint Louis (STL) 1

17:21
Seattle-Tacoma (SEA)
Effective from 2025-10-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:26, non-stop
Boeing 737 (73J)
Alaska Airlines AS388
15:08
Saint Louis (STL) 1

17:39
Seattle-Tacoma (SEA)
Valid until 2025-05-06
Mon
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 4:31, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS388
15:08
Saint Louis (STL) 1

17:39
Seattle-Tacoma (SEA)
Valid until 2025-05-07
Mon
-
Tue
-
Wed
Thu
Fri
-
Sat
Sun
Duration: 4:31, non-stop
Boeing 737 (73J)
Alaska Airlines AS388
15:08
Saint Louis (STL) 1

17:39
Seattle-Tacoma (SEA)
Effective 2025-05-08 through 2025-05-13
Mon
-
Tue
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 4:31, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS388
15:08
Saint Louis (STL) 1

17:39
Seattle-Tacoma (SEA)
Effective 2025-05-09 through 2025-05-14
Mon
Tue
-
Wed
Thu
-
Fri
Sat
Sun
Duration: 4:31, non-stop
Boeing 737 (73J)
Alaska Airlines AS388
15:17
Saint Louis (STL) 1

17:41
Seattle-Tacoma (SEA)
Effective 2025-08-20 through 2025-10-03
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:24, non-stop
Boeing 737 (73J)
Alaska Airlines AS388
15:24
Saint Louis (STL) 1

17:50
Seattle-Tacoma (SEA)
Effective 2025-06-12 through 2025-06-19
Mon
-
Tue
Wed
Thu
Fri
-
Sat
-
Sun
Duration: 4:26, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS388
15:24
Saint Louis (STL) 1

17:50
Seattle-Tacoma (SEA)
Effective 2025-06-13 through 2025-06-20
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
-
Duration: 4:26, non-stop
Boeing 737 (73J)
Alaska Airlines AS388
15:24
Saint Louis (STL) 1

17:50
Seattle-Tacoma (SEA)
Effective 2025-06-21 through 2025-06-26
Mon
-
Tue
Wed
Thu
Fri
-
Sat
Sun
Duration: 4:26, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS388
15:24
Saint Louis (STL) 1

17:50
Seattle-Tacoma (SEA)
Effective 2025-06-23 through 2025-06-30
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
-
Duration: 4:26, non-stop
Boeing 737 (73J)
Alaska Airlines AS388
15:24
Saint Louis (STL) 1

17:50
Seattle-Tacoma (SEA)
Effective 2025-06-29 through 2025-07-10
Mon
-
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:26, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS388
15:24
Saint Louis (STL) 1

17:50
Seattle-Tacoma (SEA)
Effective 2025-07-07 through 2025-07-12
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
-
Duration: 4:26, non-stop
Boeing 737 (73J)
Alaska Airlines AS388
15:24
Saint Louis (STL) 1

17:50
Seattle-Tacoma (SEA)
Effective 2025-07-13 through 2025-07-27
Mon
Tue
Wed
Thu
Fri
-
Sat
-
Sun
Duration: 4:26, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS388
15:24
Saint Louis (STL) 1

17:50
Seattle-Tacoma (SEA)
Effective 2025-07-18 through 2025-07-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
-
Duration: 4:26, non-stop
Boeing 737 (73J)
Alaska Airlines AS388
15:24
Saint Louis (STL) 1

17:50
Seattle-Tacoma (SEA)
Effective 2025-07-28 through 2025-08-02
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
-
Duration: 4:26, non-stop
Boeing 737 (73J)
Alaska Airlines AS388
15:24
Saint Louis (STL) 1

17:50
Seattle-Tacoma (SEA)
Effective 2025-07-29 through 2025-08-19
Mon
Tue
Wed
Thu
Fri
-
Sat
-
Sun
Duration: 4:26, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS388
15:24
Saint Louis (STL) 1

17:50
Seattle-Tacoma (SEA)
Operates only on 2025-08-08
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 4:26, non-stop
Boeing 737-900 (739)
Alaska Airlines AS388
15:24
Saint Louis (STL) 1

17:50
Seattle-Tacoma (SEA)
Effective 2025-08-09 through 2025-08-16
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
-
Duration: 4:26, non-stop
Boeing 737 (73J)
Alaska Airlines AS473
06:30
Saint Louis (STL) 1

08:54
Seattle-Tacoma (SEA)
Valid until 2025-05-01
Mon
Tue
Wed
Thu
Fri
-
Sat
Sun
Duration: 4:24, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS473
06:30
Saint Louis (STL) 1

08:54
Seattle-Tacoma (SEA)
Effective 2025-05-02 through 2025-05-14
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:24, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS473
06:30
Saint Louis (STL) 1

09:00
Seattle-Tacoma (SEA)
Effective 2025-08-20 through 2025-10-03
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:30, non-stop
Boeing 737 (73J)
Alaska Airlines AS473
06:41
Saint Louis (STL) 1

09:10
Seattle-Tacoma (SEA)
Effective 2025-06-12 through 2025-07-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:29, non-stop
Boeing 737 (73J)
Alaska Airlines AS473
06:41
Saint Louis (STL) 1

09:10
Seattle-Tacoma (SEA)
Operates only on 2025-07-12
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 4:29, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS473
06:41
Saint Louis (STL) 1

09:10
Seattle-Tacoma (SEA)
Effective 2025-07-13 through 2025-07-21
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:29, non-stop
Boeing 737 (73J)
Alaska Airlines AS473
06:41
Saint Louis (STL) 1

09:10
Seattle-Tacoma (SEA)
Effective 2025-07-22 through 2025-07-25
Mon
-
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 4:29, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS473
06:41
Saint Louis (STL) 1

09:10
Seattle-Tacoma (SEA)
Effective 2025-07-23 through 2025-08-07
Mon
Tue
Wed
Thu
Fri
-
Sat
Sun
Duration: 4:29, non-stop
Boeing 737 (73J)
Alaska Airlines AS473
06:41
Saint Louis (STL) 1

09:10
Seattle-Tacoma (SEA)
Operates only on 2025-08-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 4:29, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS473
06:41
Saint Louis (STL) 1

09:10
Seattle-Tacoma (SEA)
Effective 2025-08-08 through 2025-08-19
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:29, non-stop
Boeing 737 (73J)
Alaska Airlines AS473
07:00
Saint Louis (STL) 1

09:26
Seattle-Tacoma (SEA)
Effective 2025-10-04 through 2026-01-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:26, non-stop
Boeing 737 (73J)
Alaska Airlines AS473
07:00
Saint Louis (STL) 1

09:26
Seattle-Tacoma (SEA)
Effective from 2026-02-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:26, non-stop
Boeing 737 (73J)
Alaska Airlines AS503
18:18
Saint Louis (STL) 1

20:45
Seattle-Tacoma (SEA)
Effective 2025-06-01 through 2025-06-10
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:27, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS503
18:22
Saint Louis (STL) 1

20:50
Seattle-Tacoma (SEA)
Effective 2025-05-15 through 2025-05-16
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 4:28, non-stop
Boeing 737 (73J)
Alaska Airlines AS503
18:22
Saint Louis (STL) 1

20:50
Seattle-Tacoma (SEA)
Effective 2025-05-17 through 2025-05-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:28, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS503
18:22
Saint Louis (STL) 1

20:50
Seattle-Tacoma (SEA)
Operates only on 2025-05-26
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 4:28, non-stop
Boeing 737 (73J)
Alaska Airlines AS503
18:22
Saint Louis (STL) 1

20:50
Seattle-Tacoma (SEA)
Effective 2025-05-27 through 2025-05-31
Mon
-
Tue
Wed
Thu
Fri
Sat
Sun
-
Duration: 4:28, non-stop
Boeing 737 MAX 9 (7M9)
Ad mobi box here (300x250px) 6815354179 M FlightInfo Bottom Box
Parallax here STL-SEA
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  • A domestic route departing from the Saint Louis airport (STL) and arriving at Seattle-Tacoma airport (SEA).
  • The flight distance is 1704 miles, or 2743 km.
  • The timezone of the departure airport is UTC-6 , and the timezone of the arrival airport is UTC-8 . Current time at the point of departure is (loading...), and (loading...) at the point of arrival. There is a (loading...) hour time difference between the airports.
  • For direct flights, the flight time varies between 4:17 and 4:31.
Return (SEA-STL) flights
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