Airlines with flights from Seattle to Saint Louis

There are five airlines with scheduled flights between SEA and STL. Both Alaska Airlines and Southwest operates non-stop flights from Seattle Airport to Saint Louis Airport and the flight time is 3 hours and 55 minutes.

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Schedules

Alaska Airlines

Non-stop with Alaska Airlines

  • Total flight time: 3 hours and 55 minutes
  • One World Alliance
  • Seattle is a Alaska Airlines hub (Primary hub).
  • 21 flights per week
  • Boeing 737MAX 9 Passenger
    Boeing 737-900 (winglets) Passenger/BBJ3
    Boeing 737-800 (winglets) Passenger/BBJ2
  • Business and first class available
SEA
Direct
STL
 
Flight
Mon
Jun 29
Tue
Jun 30
Wed
Jul 1
Thu
Jul 2
Fri
Jul 3
Sat
Jul 4
Sun
Jul 5
AS618
07:55
07:55
07:55
07:55
07:55
07:55
07:55
AS647
13:06
13:06
13:06
13:06
13:06
13:06
13:06
AS615
18:04
18:04
18:04
18:04
18:04
----
18:04
SHOW RETURN SCHEDULE
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The timetable & schedule information was updated at 2026-04-22

Southwest Airlines

Non-stop with Southwest Airlines

  • Total flight time: 3 hours and 50 minutes
  • Low-cost airline
  • 8 flights per week
  • Boeing 737MAX 8 Passenger
    Boeing 737-800 (winglets) Passenger/BBJ2
SEA
Direct
STL
 
Flight
Mon
Jun 29
Tue
Jun 30
Wed
Jul 1
Thu
Jul 2
Fri
Jul 3
Sat
Jul 4
Sun
Jul 5
WN3632
09:00
09:30
09:30
09:00
09:00
----
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WN1965
----
----
----
----
----
09:50
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WN140
----
----
----
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11:00
SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - STL

The timetable & schedule information was updated at 2026-04-22

Southwest Airlines

Via Denver with Southwest Airlines

  • Total flight time: 5h 15m - 10h 25m.
  • Low-cost airline
  • 128 flights per week
  • Boeing 737MAX 8 Passenger
    Boeing 737-800 (winglets) Passenger/BBJ2
SEA
 
Via DEN
 
STL
 
Flight
Mon
Jun 29
Tue
Jun 30
Wed
Jul 1
Thu
Jul 2
Fri
Jul 3
Sat
Jul 4
Sun
Jul 5
WN3615
WN1753
05:15
05:15
05:15
05:15
05:15
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WN3615
WN681
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----
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05:30
WN1939
WN103
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05:30
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WN4920
WN3152
----
07:35
07:35
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----
----
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WN1070
WN1756
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07:45
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WN364
WN1756
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11:55
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WN3616
WN5074
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----
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12:20
12:20
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WN1049
WN1756
----
14:15
14:15
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----
----
----
WN1166
WN1758
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----
----
----
----
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14:25
WN3617
WN1756
14:35
----
----
14:35
14:35
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----
SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - STL

The timetable & schedule information was updated at 2026-04-22

Delta Air Lines

Via Minneapolis with Delta Air Lines

  • Total flight time: 5h 33m - 8h 00m.
  • Sky Team Alliance
  • Seattle is a Delta Air Lines hub.
  • 86 flights per week
SEA
 
Via MSP
 
STL
 
Flight
Mon
Jun 29
Tue
Jun 30
Wed
Jul 1
Thu
Jul 2
Fri
Jul 3
Sat
Jul 4
Sun
Jul 5
DL943
DL4167
06:05
06:05
06:05
06:05
06:05
06:05
06:05
DL536
DL3185
09:06
09:06
09:06
09:06
09:06
09:06
09:06
DL941
DL1609
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----
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----
----
12:09
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DL942
DL1609
14:30
14:30
14:30
14:30
14:30
14:30
14:30
DL953
DL5286
23:59
23:59
23:59
23:59
----
23:59
23:59
SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - STL

The timetable & schedule information was updated at 2026-04-22

Delta Air Lines

Via Salt Lake City with Delta Air Lines

  • Total flight time: 5h 33m - 7h 58m.
  • Sky Team Alliance
  • Seattle is a Delta Air Lines hub.
  • 71 flights per week
SEA
 
Via SLC
 
STL
 
Flight
Mon
Jun 29
Tue
Jun 30
Wed
Jul 1
Thu
Jul 2
Fri
Jul 3
Sat
Jul 4
Sun
Jul 5
DL1128
DL2455
05:30
05:30
05:30
05:30
05:30
05:30
05:30
DL1016
DL1492
09:26
09:26
09:26
09:26
09:26
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09:26
DL1265
DL1492
11:05
11:05
11:05
11:05
11:05
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11:05
DL1265
DL2666
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----
----
----
----
11:05
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DL1120
DL2666
----
----
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13:30
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SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - STL

The timetable & schedule information was updated at 2026-04-22

United Airlines

Via Denver with United Airlines

  • Total flight time: 5h 35m - 10h 12m.
  • 113 flights per week
SEA
 
Via DEN
 
STL
 
Flight
Mon
Jun 29
Tue
Jun 30
Wed
Jul 1
Thu
Jul 2
Fri
Jul 3
Sat
Jul 4
Sun
Jul 5
UA2601
UA652
05:00
05:00
05:00
05:00
05:00
05:00
05:00
UA1505
UA1639
08:56
08:56
08:58
08:56
08:56
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08:57
UA757
UA1422
11:02
11:02
11:02
11:02
11:02
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11:02
UA1351
UA1422
12:50
12:50
12:50
12:50
12:50
----
12:50
UA333
UA214
14:33
14:33
14:33
14:33
14:33
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14:34
UA667
UA214
15:40
15:40
15:40
15:40
15:40
----
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UA325
UA214
----
----
----
----
----
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15:41
SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - STL

The timetable & schedule information was updated at 2026-04-22

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Flight data on this page was last updated on 2026-06-15
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