All airlines flying from Saint Louis (STL) to Seattle-Tacoma (SEA).
| FLIGHT SCHEDULE |
|---|
| Direct Flights: |
| Daily
19:32
Saint Louis (STL) 1
22:01
Seattle-Tacoma (SEA) Alaska Airlines AS 291 Non-stop Boeing 737 (73J) 4:29 Effective 2026-06-10 through 2026-10-02 |
| Thu,Fri
14:47
Saint Louis (STL) 1
17:26
Seattle-Tacoma (SEA) Alaska Airlines AS 314 Non-stop Boeing 737 (73J) 4:39 Effective 2026-02-12 through 2026-02-19 |
| Mon,Sat
14:47
Saint Louis (STL) 1
17:26
Seattle-Tacoma (SEA) Alaska Airlines AS 314 Non-stop Boeing 737 MAX 9 (7M9) 4:39 Effective 2026-02-14 through 2026-02-21 |
| Fri
14:47
Saint Louis (STL) 1
17:26
Seattle-Tacoma (SEA) Alaska Airlines AS 314 Non-stop Boeing 737 MAX 8 (7M8) 4:39 Operates only on 2026-02-20 |
| Mon,Thu,Fri
14:47
Saint Louis (STL) 1
17:26
Seattle-Tacoma (SEA) Alaska Airlines AS 314 Non-stop Boeing 737 (73J) 4:39 Effective 2026-02-23 through 2026-03-06 |
| Sat
14:47
Saint Louis (STL) 1
17:26
Seattle-Tacoma (SEA) Alaska Airlines AS 314 Non-stop Boeing 737 MAX 9 (7M9) 4:39 Operates only on 2026-02-28 |
| Mon,Thu-Sat
14:47
Saint Louis (STL) 1
17:26
Seattle-Tacoma (SEA) Alaska Airlines AS 314 Non-stop Boeing 737 (73J) 4:39 Effective 2026-03-07 through 2026-03-14 |
| Mon
14:47
Saint Louis (STL) 1
17:26
Seattle-Tacoma (SEA) Alaska Airlines AS 314 Non-stop Boeing 737 MAX 9 (7M9) 4:39 Operates only on 2026-03-16 |
| Wed
14:55
Saint Louis (STL) 1
17:21
Seattle-Tacoma (SEA) Alaska Airlines AS 314 Non-stop Boeing 737 (73J) 4:26 Operates only on 2026-03-18 |
| Daily
14:55
Saint Louis (STL) 1
17:22
Seattle-Tacoma (SEA) Alaska Airlines AS 314 Non-stop Boeing 737 (73J) 4:27 Effective 2026-03-19 through 2026-05-12 |
| Daily
15:03
Saint Louis (STL) 1
17:32
Seattle-Tacoma (SEA) Alaska Airlines AS 314 Non-stop Boeing 737 (73J) 4:29 Effective 2026-05-13 through 2026-06-09 |
| Sun
15:19
Saint Louis (STL) 1
17:58
Seattle-Tacoma (SEA) Alaska Airlines AS 314 Non-stop Boeing 737 MAX 9 (7M9) 4:39 Effective 2026-02-15 through 2026-03-15 |
| Daily
15:24
Saint Louis (STL) 1
17:52
Seattle-Tacoma (SEA) Alaska Airlines AS 388 Non-stop Boeing 737 (73J) 4:28 Effective from 2026-06-10 |
| Daily
17:26
Saint Louis (STL) 1
19:59
Seattle-Tacoma (SEA) Alaska Airlines AS 388 Non-stop Boeing 737 (73J) 4:33 Valid until 2026-01-06 |
| Sat
18:19
Saint Louis (STL) 1
20:54
Seattle-Tacoma (SEA) Alaska Airlines AS 388 Non-stop Boeing 737 (73J) 4:35 Operates only on 2026-01-10 |
| Sat
18:19
Saint Louis (STL) 1
20:54
Seattle-Tacoma (SEA) Alaska Airlines AS 388 Non-stop Boeing 737 MAX 9 (7M9) 4:35 Operates only on 2026-01-17 |
| Sat
18:19
Saint Louis (STL) 1
20:54
Seattle-Tacoma (SEA) Alaska Airlines AS 388 Non-stop Boeing 737 (73J) 4:35 Effective 2026-01-24 through 2026-02-07 |
| Daily
06:41
Saint Louis (STL) 1
09:12
Seattle-Tacoma (SEA) Alaska Airlines AS 473 Non-stop Boeing 737 (73J) 4:31 Effective from 2026-06-10 |
| Mon,Sun
07:00
Saint Louis (STL) 1
09:39
Seattle-Tacoma (SEA) Alaska Airlines AS 473 Non-stop Boeing 737-800 (73H) 4:39 Valid until 2026-01-04 |
| Mon-Wed
07:00
Saint Louis (STL) 1
09:39
Seattle-Tacoma (SEA) Alaska Airlines AS 473 Non-stop Boeing 737 MAX 9 (7M9) 4:39 Valid until 2026-01-05 |
| Tue,Thu-Sat
07:00
Saint Louis (STL) 1
09:39
Seattle-Tacoma (SEA) Alaska Airlines AS 473 Non-stop Boeing 737 (73J) 4:39 Valid until 2026-01-06 |
| Mon,Wed-Fri,Sun
07:00
Saint Louis (STL) 1
09:42
Seattle-Tacoma (SEA) Alaska Airlines AS 473 Non-stop Boeing 737 (73J) 4:42 Effective 2026-02-13 through 2026-02-23 |
| Tue
07:00
Saint Louis (STL) 1
09:42
Seattle-Tacoma (SEA) Alaska Airlines AS 473 Non-stop Boeing 737 MAX 9 (7M9) 4:42 Operates only on 2026-02-17 |
| Mon-Fri,Sun
07:00
Saint Louis (STL) 1
09:42
Seattle-Tacoma (SEA) Alaska Airlines AS 473 Non-stop Boeing 737 (73J) 4:42 Effective 2026-02-24 through 2026-03-12 |
| Fri
07:00
Saint Louis (STL) 1
09:42
Seattle-Tacoma (SEA) Alaska Airlines AS 473 Non-stop Boeing 737 MAX 9 (7M9) 4:42 Operates only on 2026-03-13 |
| Mon,Sun
07:00
Saint Louis (STL) 1
09:42
Seattle-Tacoma (SEA) Alaska Airlines AS 473 Non-stop Boeing 737 (73J) 4:42 Effective 2026-03-15 through 2026-03-16 |
| Tue
07:00
Saint Louis (STL) 1
09:42
Seattle-Tacoma (SEA) Alaska Airlines AS 473 Non-stop Boeing 737-800 (73H) 4:42 Operates only on 2026-03-17 |
| Wed
07:00
Saint Louis (STL) 1
09:26
Seattle-Tacoma (SEA) Alaska Airlines AS 473 Non-stop Boeing 737 (73J) 4:26 Operates only on 2026-03-18 |
| Daily
07:00
Saint Louis (STL) 1
09:31
Seattle-Tacoma (SEA) Alaska Airlines AS 473 Non-stop Boeing 737 (73J) 4:31 Effective 2026-03-19 through 2026-05-12 |
| Daily
18:22
Saint Louis (STL) 1
20:50
Seattle-Tacoma (SEA) Alaska Airlines AS 503 Non-stop Boeing 737 (73J) 4:28 Effective 2026-05-13 through 2026-06-09 |
| Daily
07:00
Saint Louis (STL) 1
09:17
Seattle-Tacoma (SEA) Alaska Airlines AS 504 Non-stop Boeing 737 (73J) 4:17 Effective 2026-05-13 through 2026-06-09 |
| Tue-Thu,Sun
14:50
Saint Louis (STL) 1
17:25
Seattle-Tacoma (SEA) Alaska Airlines AS 618 Non-stop Boeing 737 MAX 9 (7M9) 4:35 Effective 2026-01-07 through 2026-01-15 |
| Fri
14:50
Saint Louis (STL) 1
17:25
Seattle-Tacoma (SEA) Alaska Airlines AS 618 Non-stop Boeing 737 MAX 8 (7M8) 4:35 Operates only on 2026-01-09 |
| Mon,Sun
14:50
Saint Louis (STL) 1
17:25
Seattle-Tacoma (SEA) Alaska Airlines AS 618 Non-stop Boeing 737 (73J) 4:35 Effective 2026-01-12 through 2026-01-19 |
| Tue-Fri
14:50
Saint Louis (STL) 1
17:25
Seattle-Tacoma (SEA) Alaska Airlines AS 618 Non-stop Boeing 737 MAX 9 (7M9) 4:35 Effective 2026-01-16 through 2026-01-22 |
| Mon,Fri,Sun
14:50
Saint Louis (STL) 1
17:25
Seattle-Tacoma (SEA) Alaska Airlines AS 618 Non-stop Boeing 737 (73J) 4:35 Effective 2026-01-23 through 2026-01-30 |
| Tue-Thu,Sun
14:50
Saint Louis (STL) 1
17:25
Seattle-Tacoma (SEA) Alaska Airlines AS 618 Non-stop Boeing 737 MAX 9 (7M9) 4:35 Effective 2026-01-27 through 2026-02-05 |
| Mon
14:50
Saint Louis (STL) 1
17:25
Seattle-Tacoma (SEA) Alaska Airlines AS 618 Non-stop Boeing 737 MAX 8 (7M8) 4:35 Operates only on 2026-02-02 |
| Fri,Sun
14:50
Saint Louis (STL) 1
17:25
Seattle-Tacoma (SEA) Alaska Airlines AS 618 Non-stop Boeing 737 (73J) 4:35 Effective 2026-02-06 through 2026-02-08 |
| Mon
14:50
Saint Louis (STL) 1
17:25
Seattle-Tacoma (SEA) Alaska Airlines AS 618 Non-stop Boeing 737 MAX 9 (7M9) 4:35 Operates only on 2026-02-09 |
| Tue,Wed
14:50
Saint Louis (STL) 1
17:25
Seattle-Tacoma (SEA) Alaska Airlines AS 618 Non-stop Boeing 737 MAX 8 (7M8) 4:35 Effective 2026-02-10 through 2026-02-11 |
| Wed
07:00
Saint Louis (STL) 1
09:39
Seattle-Tacoma (SEA) Alaska Airlines AS 1443 Non-stop Boeing 737 MAX 9 (7M9) 4:39 Operates only on 2026-01-07 |
| Mon,Thu,Fri
08:25
Saint Louis (STL) 2
10:45
Seattle-Tacoma (SEA) Southwest Airlines WN 2190 Non-stop Boeing 737-800 (73H) 4:20 Effective 2026-08-06 through 2026-09-28 |
| Sun
10:45
Saint Louis (STL) 2
13:05
Seattle-Tacoma (SEA) Southwest Airlines WN 2190 Non-stop Boeing 737-800 (73H) 4:20 Effective 2026-08-09 through 2026-09-27 |
| Mon,Thu,Fri
11:40
Saint Louis (STL) 2
13:55
Seattle-Tacoma (SEA) Southwest Airlines WN 3981 Non-stop Boeing 737-800 (73H) 4:15 Effective 2026-06-04 through 2026-08-03 |
| Sun
12:00
Saint Louis (STL) 2
14:15
Seattle-Tacoma (SEA) Southwest Airlines WN 3981 Non-stop Boeing 737-700 (Scimitar Winglets) 4:15 Effective 2026-06-07 through 2026-08-02 |
| Sat
12:05
Saint Louis (STL) 2
14:20
Seattle-Tacoma (SEA) Southwest Airlines WN 3981 Non-stop Boeing 737 MAX 8 (7M8) 4:15 Effective 2026-06-06 through 2026-08-01 |
| Tue,Wed
12:05
Saint Louis (STL) 2
14:20
Seattle-Tacoma (SEA) Southwest Airlines WN 3981 Non-stop Boeing 737-800 (73H) 4:15 Effective 2026-06-09 through 2026-07-29 |
| Sat
14:20
Saint Louis (STL) 2
16:40
Seattle-Tacoma (SEA) Southwest Airlines WN 4070 Non-stop Boeing 737 MAX 8 (7M8) 4:20 Effective 2026-08-08 through 2026-09-26 |
| Non-Direct Flights: |
| Tue,Wed
05:50
Saint Louis (STL) 2
10:20
Seattle-Tacoma (SEA) Southwest Airlines WN 1396 1-stop Boeing 737-700 (Scimitar Winglets) 6:30 Effective 2026-06-09 through 2026-07-29 |
- 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 4:15 and 4:42.
