Alaska Airlines flight AS 4121: Dallas Fort Worth - Saint Louis

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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Mon-Fri,Sun 20:40 Dallas Fort Worth (DFW) 22:28 Saint Louis (STL) 1
AS 4121 Non-stop Airbus A319 (319) 1:48 Valid until 2025-05-02
Codeshare flight, operated by American Airlines.(AA 1010)
Sat,Sun 20:40 Dallas Fort Worth (DFW) 22:28 Saint Louis (STL) 1
AS 4121 Non-stop Airbus A319 (319) 1:48 Effective 2025-05-03 through 2025-05-04
Codeshare flight, operated by American Airlines.(AA 1010)
Daily 20:40 Dallas Fort Worth (DFW) 22:30 Saint Louis (STL) 1
AS 4121 Non-stop Airbus A319 (319) 1:50 Effective 2025-08-06 through 2025-09-02
Codeshare flight, operated by American Airlines.(AA 1010)
Daily 20:40 Dallas Fort Worth (DFW) 22:27 Saint Louis (STL) 1
AS 4121 Non-stop Airbus A319 (319) 1:47 Effective 2025-09-03 through 2025-10-05
Codeshare flight, operated by American Airlines.(AA 1010)
Daily 20:40 Dallas Fort Worth (DFW) 22:29 Saint Louis (STL) 1
AS 4121 Non-stop Airbus A319 (319) 1:49 Effective 2025-11-02 through 2025-12-02
Codeshare flight, operated by American Airlines.(AA 1010)
Daily 20:40 Dallas Fort Worth (DFW) 22:22 Saint Louis (STL) 1
AS 4121 Non-stop Airbus A319 (319) 1:42 Effective 2025-12-03 through 2025-12-17
Codeshare flight, operated by American Airlines.(AA 1010)
Daily 20:40 Dallas Fort Worth (DFW) 22:21 Saint Louis (STL) 1
AS 4121 Non-stop Airbus A319 (319) 1:41 Effective 2025-12-18 through 2026-01-05
Codeshare flight, operated by American Airlines.(AA 1010)
Daily 20:40 Dallas Fort Worth (DFW) 22:27 Saint Louis (STL) 1
AS 4121 Non-stop Airbus A319 (319) 1:47 Effective 2026-01-06 through 2026-02-11
Codeshare flight, operated by American Airlines.(AA 1010)
Daily 20:40 Dallas Fort Worth (DFW) 22:24 Saint Louis (STL) 1
AS 4121 Non-stop Airbus A319 (319) 1:44 Effective from 2026-02-12
Codeshare flight, operated by American Airlines.(AA 1010)
Daily 20:43 Dallas Fort Worth (DFW) 22:34 Saint Louis (STL) 1
AS 4121 Non-stop Airbus A319 (319) 1:51 Effective 2025-10-06 through 2025-11-01
Codeshare flight, operated by American Airlines.(AA 1010)
Daily 20:52 Dallas Fort Worth (DFW) 22:45 Saint Louis (STL) 1
AS 4121 Non-stop Airbus A320 (320) 1:53 Effective 2025-05-05 through 2025-06-03
Codeshare flight, operated by American Airlines.(AA 1010)
Wed 20:52 Dallas Fort Worth (DFW) 22:46 Saint Louis (STL) 1
AS 4121 Non-stop Airbus A319 (319) 1:54 Operates only on 2025-06-04
Codeshare flight, operated by American Airlines.(AA 1010)
Mon-Fri 21:03 Dallas Fort Worth (DFW) 23:00 Saint Louis (STL) 1
AS 4121 Non-stop Boeing 737 MAX 8 (7M8) 1:57 Effective 2025-06-09 through 2025-06-13
Codeshare flight, operated by American Airlines.(AA 1010)
Daily 21:05 Dallas Fort Worth (DFW) 22:57 Saint Louis (STL) 1
AS 4121 Non-stop Airbus A319 (319) 1:52 Effective 2025-07-05 through 2025-08-05
Codeshare flight, operated by American Airlines.(AA 1010)
Thu-Sun 21:32 Dallas Fort Worth (DFW) 23:19 Saint Louis (STL) 1
AS 4121 Non-stop Boeing 737-800 (738) 1:47 Effective 2025-06-05 through 2025-06-08
Codeshare flight, operated by American Airlines.(AA 1010)
Daily 21:32 Dallas Fort Worth (DFW) 23:19 Saint Louis (STL) 1
AS 4121 Non-stop Boeing 737-800 (738) 1:47 Effective 2025-06-14 through 2025-07-03
Codeshare flight, operated by American Airlines.(AA 1010)
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Alaska Airlines flight AS 4121:
Dallas Fort Worth - Saint Louis
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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Alaska Airlines AS4121
20:40
Dallas Fort Worth (DFW)

22:28
Saint Louis (STL) 1
Valid until 2025-05-02
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by American Airlines. (AA 1010)
Duration: 1:48, non-stop
Airbus A319 (319)
Alaska Airlines AS4121
20:40
Dallas Fort Worth (DFW)

22:28
Saint Louis (STL) 1
Effective 2025-05-03 through 2025-05-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 1010)
Duration: 1:48, non-stop
Airbus A319 (319)
Alaska Airlines AS4121
20:40
Dallas Fort Worth (DFW)

22:30
Saint Louis (STL) 1
Effective 2025-08-06 through 2025-09-02
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 1010)
Duration: 1:50, non-stop
Airbus A319 (319)
Alaska Airlines AS4121
20:40
Dallas Fort Worth (DFW)

22:27
Saint Louis (STL) 1
Effective 2025-09-03 through 2025-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 1010)
Duration: 1:47, non-stop
Airbus A319 (319)
Alaska Airlines AS4121
20:40
Dallas Fort Worth (DFW)

22:29
Saint Louis (STL) 1
Effective 2025-11-02 through 2025-12-02
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 1010)
Duration: 1:49, non-stop
Airbus A319 (319)
Alaska Airlines AS4121
20:40
Dallas Fort Worth (DFW)

22:22
Saint Louis (STL) 1
Effective 2025-12-03 through 2025-12-17
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 1010)
Duration: 1:42, non-stop
Airbus A319 (319)
Alaska Airlines AS4121
20:40
Dallas Fort Worth (DFW)

22:21
Saint Louis (STL) 1
Effective 2025-12-18 through 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 1010)
Duration: 1:41, non-stop
Airbus A319 (319)
Alaska Airlines AS4121
20:40
Dallas Fort Worth (DFW)

22:27
Saint Louis (STL) 1
Effective 2026-01-06 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 1010)
Duration: 1:47, non-stop
Airbus A319 (319)
Alaska Airlines AS4121
20:40
Dallas Fort Worth (DFW)

22:24
Saint Louis (STL) 1
Effective from 2026-02-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 1010)
Duration: 1:44, non-stop
Airbus A319 (319)
Alaska Airlines AS4121
20:43
Dallas Fort Worth (DFW)

22:34
Saint Louis (STL) 1
Effective 2025-10-06 through 2025-11-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 1010)
Duration: 1:51, non-stop
Airbus A319 (319)
Alaska Airlines AS4121
20:52
Dallas Fort Worth (DFW)

22:45
Saint Louis (STL) 1
Effective 2025-05-05 through 2025-06-03
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 1010)
Duration: 1:53, non-stop
Airbus A320 (320)
Alaska Airlines AS4121
20:52
Dallas Fort Worth (DFW)

22:46
Saint Louis (STL) 1
Operates only on 2025-06-04
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by American Airlines. (AA 1010)
Duration: 1:54, non-stop
Airbus A319 (319)
Alaska Airlines AS4121
21:03
Dallas Fort Worth (DFW)

23:00
Saint Louis (STL) 1
Effective 2025-06-09 through 2025-06-13
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Codeshare flight, operated by American Airlines. (AA 1010)
Duration: 1:57, non-stop
Boeing 737 MAX 8 (7M8)
Alaska Airlines AS4121
21:05
Dallas Fort Worth (DFW)

22:57
Saint Louis (STL) 1
Effective 2025-07-05 through 2025-08-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 1010)
Duration: 1:52, non-stop
Airbus A319 (319)
Alaska Airlines AS4121
21:32
Dallas Fort Worth (DFW)

23:19
Saint Louis (STL) 1
Effective 2025-06-05 through 2025-06-08
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 1010)
Duration: 1:47, non-stop
Boeing 737-800 (738)
Alaska Airlines AS4121
21:32
Dallas Fort Worth (DFW)

23:19
Saint Louis (STL) 1
Effective 2025-06-14 through 2025-07-03
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 1010)
Duration: 1:47, non-stop
Boeing 737-800 (738)
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  • AS 4121 is a domestic flight departing from the Dallas Fort Worth airport (DFW) and arriving at Saint Louis airport (STL).
  • The flight distance is 550 miles, or 885 km.
  • The timezone of both the departure and the arrival airports is UTC-6 . Current time at both airports is (loading...).
  • For direct flights, the flight time varies between 1:41 and 1:57.
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