Airlines with flights from Saint Louis to Seattle
There are five airlines with scheduled flights between STL and SEA. Both Alaska Airlines and Southwest operates non-stop flights from Saint Louis Airport to Seattle Airport and the flight time is 4 hours and 28 minutes.
There are five airlines with scheduled flights between STL and SEA. Both Alaska Airlines and Southwest operates non-stop flights from Saint Louis Airport to Seattle Airport and the flight time is 4 hours and 28 minutes. Choose airline
Direct
Non-stop
4h 28min
Direct
Non-stop
4h 18min
Via Denver
5h 55min
Via Minneapolis
6h 3min
Via Denver
6h 4min
Via Salt Lake City
6h 5min
Via Chicago
6h 15min
NEW
Via Portland
6h 35min
Via Chicago
6h 38min
Via Dallas
6h 41min
Via Dallas
6h 45min
Via Chicago
6h 48min
NEW
Starts 06/06
Via Kansas City
6h 45min
Schedules
Non-stop with Alaska Airlines
-
Total flight time: 4 hours and 28 minutes
-
One World Alliance
-
Seattle is a Alaska Airlines hub (Primary hub).
-
21 flights per week
-
Boeing 737-900 (winglets) Passenger/BBJ3Boeing 737MAX 9 Passenger
-
Business and first class available
STL
Direct
SEA
W25, Jun 15 - Jun 21
Flight
Mon
Jun 15
Tue
Jun 16
Wed
Jun 17
Thu
Jun 18
Fri
Jun 19
Sat
Jun 20
Sun
Jun 21
AS473
06:02
06:02
06:02
06:02
06:02
06:02
06:02
AS618
14:50
14:50
14:50
14:50
14:50
14:50
14:50
AS647
19:56
19:56
19:56
19:56
19:56
19:56
19:56
The timetable & schedule information was updated at 2026-04-21
Non-stop with Southwest Airlines
-
Total flight time: 4 hours and 18 minutes
-
Low-cost airline
-
7 flights per week
-
Boeing 737MAX 8 PassengerBoeing 737-800 (winglets) Passenger/BBJ2Boeing 737-700 Passenger (Scimitar Winglets)
STL
Direct
SEA
W25, Jun 15 - Jun 21
Flight
Mon
Jun 15
Tue
Jun 16
Wed
Jun 17
Thu
Jun 18
Fri
Jun 19
Sat
Jun 20
Sun
Jun 21
WN5109
----
----
----
09:50
----
----
----
WN3981
11:40
12:10
12:10
11:40
11:40
12:05
12:00
The timetable & schedule information was updated at 2026-04-21
Via Denver with Southwest Airlines
-
Total flight time: 5h 55m - 10h 30m.
-
Low-cost airline
-
162 flights per week
-
Boeing 737MAX 8 PassengerBoeing 737-800 (winglets) Passenger/BBJ2Boeing 737-700 Passenger (Scimitar Winglets)
STL
Via DEN
SEA
W25, Jun 15 - Jun 21
Flight
Mon
Jun 15
Tue
Jun 16
Wed
Jun 17
Thu
Jun 18
Fri
Jun 19
Sat
Jun 20
Sun
Jun 21
WN3909
WN1713
WN1713
05:35
06:00
06:00
05:35
05:35
----
05:40
WN3909
WN1780
WN1780
----
----
----
----
----
05:40
----
WN3910
WN4130
WN4130
08:10
----
----
08:10
08:10
----
----
WN1300
WN3051
WN3051
----
----
----
----
----
----
08:25
WN3910
WN3051
WN3051
----
----
----
----
----
----
08:25
WN1476
WN3051
WN3051
----
----
----
----
----
----
08:30
WN4079
WN3051
WN3051
----
----
----
----
----
----
09:40
WN4312
WN4030
WN4030
----
----
----
----
----
----
12:50
WN339
WN760
WN760
----
----
----
----
----
----
12:55
WN1225
WN1716
WN1716
----
----
----
----
----
13:50
----
WN5067
WN1716
WN1716
----
----
----
----
----
15:00
----
WN3912
WN760
WN760
----
----
----
----
----
----
15:45
WN3912
WN1716
WN1716
16:00
16:00
16:00
16:00
16:00
----
----
WN1574
WN760
WN760
----
----
----
----
----
----
16:05
WN824
WN3856
WN3856
----
17:20
17:20
----
----
----
----
WN3913
WN3856
WN3856
18:40
18:40
18:40
18:40
18:40
----
17:35
The timetable & schedule information was updated at 2026-04-21
Via Minneapolis with Delta Air Lines
-
Total flight time: 6h 03m - 8h 29m.
-
Sky Team Alliance
-
Seattle is a Delta Air Lines hub.
-
111 flights per week
STL
Via MSP
SEA
W25, Jun 15 - Jun 21
Flight
Mon
Jun 15
Tue
Jun 16
Wed
Jun 17
Thu
Jun 18
Fri
Jun 19
Sat
Jun 20
Sun
Jun 21
DL1597
DL868
DL868
06:21
06:21
06:21
06:21
06:21
06:21
06:21
DL5325
DL889
DL889
08:49
08:49
08:49
08:49
08:49
----
08:49
DL5078
DL877
DL877
11:18
11:18
11:18
11:18
11:18
----
11:18
DL3188
DL877
DL877
----
----
----
----
----
11:18
----
DL4167
DL881
DL881
15:57
15:57
15:57
15:57
15:57
15:57
15:57
DL3185
DL505
DL505
17:42
17:42
17:42
17:42
17:42
17:42
17:42
The timetable & schedule information was updated at 2026-04-21
Via Denver with United Airlines
-
Total flight time: 6h 04m - 11h 58m.
-
119 flights per week
STL
Via DEN
SEA
W25, Jun 15 - Jun 21
Flight
Mon
Jun 15
Tue
Jun 16
Wed
Jun 17
Thu
Jun 18
Fri
Jun 19
Sat
Jun 20
Sun
Jun 21
UA362
UA2271
UA2271
05:10
05:10
05:10
05:10
05:10
05:10
05:10
UA2459
UA1424
UA1424
09:06
09:06
09:06
09:06
09:06
09:06
09:06
UA1380
UA2013
UA2013
13:38
13:38
13:38
13:38
13:38
13:38
13:38
UA1483
UA360
UA360
16:48
16:48
16:48
16:48
16:48
16:45
16:48
The timetable & schedule information was updated at 2026-04-21
Via Salt Lake City with Delta Air Lines
-
Total flight time: 6h 05m - 8h 25m.
-
Sky Team Alliance
-
Seattle is a Delta Air Lines hub.
-
104 flights per week
STL
Via SLC
SEA
W25, Jun 15 - Jun 21
Flight
Mon
Jun 15
Tue
Jun 16
Wed
Jun 17
Thu
Jun 18
Fri
Jun 19
Sat
Jun 20
Sun
Jun 21
DL2363
DL2995
DL2995
08:00
08:00
08:00
08:00
08:00
08:00
08:00
DL2455
DL871
DL871
14:28
14:28
14:28
14:28
14:28
----
14:28
DL1492
DL2998
DL2998
19:52
19:52
19:52
19:52
19:52
17:00
19:52
The timetable & schedule information was updated at 2026-04-21
Via Chicago with American Airlines