Alaska Airlines flight AS 4001: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Daily 06:40 Chicago O'Hare (ORD) 3 09:14 Buffalo (BUF)
AS 4001 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:34 Effective 2026-04-07 through 2026-05-20
Codeshare flight, operated by American Airlines.(AA 3497)
Tue,Wed 08:09 Chicago O'Hare (ORD) 3 10:51 Buffalo (BUF)
AS 4001 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:42 Effective 2026-01-06 through 2026-02-11
Codeshare flight, operated by American Airlines.(AA 3344)
Mon,Thu-Sat 08:10 Chicago O'Hare (ORD) 3 10:52 Buffalo (BUF)
AS 4001 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:42 Effective 2026-01-08 through 2026-02-09
Codeshare flight, operated by American Airlines.(AA 3344)
Sun 08:15 Chicago O'Hare (ORD) 3 10:57 Buffalo (BUF)
AS 4001 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:42 Operates only on 2026-01-11
Codeshare flight, operated by American Airlines.(AA 3344)
Sun 08:15 Chicago O'Hare (ORD) 3 10:57 Buffalo (BUF)
AS 4001 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:42 Effective 2026-01-25 through 2026-02-08
Codeshare flight, operated by American Airlines.(AA 3344)
Mon,Sat,Sun 08:20 Miami (MIA) 10:53 Chicago O'Hare (ORD) 3
AS 4001 Non-stop Boeing 737-800 (738) 3:33 Effective 2026-01-03 through 2026-01-05
Codeshare flight, operated by American Airlines.(AA 1972)
Daily 08:30 Miami (MIA) 10:53 Chicago O'Hare (ORD) 3
AS 4001 Non-stop Boeing 737-800 (738) 3:23 Effective 2026-07-02 through 2026-08-04
Codeshare flight, operated by American Airlines.(AA 1431)
Sun 08:39 Miami (MIA) 11:06 Chicago O'Hare (ORD) 3
AS 4001 Non-stop Boeing 737-800 (738) 3:27 Operates only on 2026-01-18
Codeshare flight, operated by American Airlines.(AA 1844)
Daily 08:40 Miami (MIA) 11:03 Chicago O'Hare (ORD) 3
AS 4001 Non-stop Boeing 737-800 (738) 3:23 Effective from 2026-10-05
Codeshare flight, operated by American Airlines.(AA 1431)
Daily 09:01 Miami (MIA) 11:31 Chicago O'Hare (ORD) 3
AS 4001 Non-stop Boeing 737-800 (738) 3:30 Effective 2026-05-21 through 2026-07-01
Codeshare flight, operated by American Airlines.(AA 1431)
Daily 09:09 Miami (MIA) 11:36 Chicago O'Hare (ORD) 3
AS 4001 Non-stop Boeing 737-800 (738) 3:27 Effective 2026-08-05 through 2026-09-04
Codeshare flight, operated by American Airlines.(AA 1431)
Daily 09:10 Miami (MIA) 11:33 Chicago O'Hare (ORD) 3
AS 4001 Non-stop Boeing 737-800 (738) 3:23 Effective 2026-09-09 through 2026-10-04
Codeshare flight, operated by American Airlines.(AA 1431)
Daily 10:16 Buffalo (BUF) 11:10 Chicago O'Hare (ORD) 3
AS 4001 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:54 Effective 2026-04-07 through 2026-05-20
Codeshare flight, operated by American Airlines.(AA 3497)
Daily 14:50 Chicago O'Hare (ORD) 3 18:59 Miami (MIA)
AS 4001 Non-stop Boeing 737-800 (738) 3:09 Effective 2026-09-09 through 2026-10-04
Codeshare flight, operated by American Airlines.(AA 1431)
Daily 15:17 Chicago O'Hare (ORD) 3 19:24 Miami (MIA)
AS 4001 Non-stop Boeing 737-800 (738) 3:07 Effective 2026-05-21 through 2026-07-01
Codeshare flight, operated by American Airlines.(AA 1431)
Fri 19:54 Chicago O'Hare (ORD) 3 22:49 Buffalo (BUF)
AS 4001 Non-stop Embraer EMB 175 (E75) 1:55 Valid until 2026-01-02
Codeshare flight, operated by American Airlines.(AA 4572)
Thu 20:19 Chicago O'Hare (ORD) 3 22:57 Buffalo (BUF)
AS 4001 Non-stop Airbus A319 (319) 1:38 Operates only on 2026-01-01
Codeshare flight, operated by American Airlines.(AA 1460)
Mon,Tue,Sat,Sun 21:17 Dallas Fort Worth (DFW) 23:14 Birmingham (BHM)
AS 4001 Non-stop Embraer EMB 175 (E75) 1:57 Effective 2026-09-05 through 2026-09-08
Codeshare flight, operated by American Airlines.(AA 3457)
Mon-Fri,Sun 21:35 Dallas Fort Worth (DFW) E 23:24 Birmingham (BHM)
AS 4001 Non-stop Canadair CRJ 700 (CR7) 1:49 Effective 2026-02-12 through 2026-02-20
Codeshare flight, operated by American Airlines.(AA 6194)
Daily 21:35 Dallas Fort Worth (DFW) E 23:24 Birmingham (BHM)
AS 4001 Non-stop Canadair CRJ 700 (CR7) 1:49 Effective 2026-02-21 through 2026-03-07
Codeshare flight, operated by American Airlines.(AA 6194)
Daily 21:35 Dallas Fort Worth (DFW) E 23:28 Birmingham (BHM)
AS 4001 Non-stop Canadair CRJ 700 (CR7) 1:53 Effective 2026-03-08 through 2026-04-06
Codeshare flight, operated by American Airlines.(AA 6194)
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This flight number is listed as serving the following routes:


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Alaska Airlines flight AS 4001: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Alaska Airlines AS4001
06:40
Chicago O'Hare (ORD) 3

09:14
Buffalo (BUF)
Effective 2026-04-07 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 3497)
Duration: 1:34, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Codeshare Flights:
Alaska Airlines AS4001
08:09
Chicago O'Hare (ORD) 3

10:51
Buffalo (BUF)
Effective 2026-01-06 through 2026-02-11
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by American Airlines. (AA 3344)
Duration: 1:42, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Codeshare Flights:
Alaska Airlines AS4001
08:10
Chicago O'Hare (ORD) 3

10:52
Buffalo (BUF)
Effective 2026-01-08 through 2026-02-09
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
-
Codeshare flight, operated by American Airlines. (AA 3344)
Duration: 1:42, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Codeshare Flights:
Alaska Airlines AS4001
08:15
Chicago O'Hare (ORD) 3

10:57
Buffalo (BUF)
Operates only on 2026-01-11
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by American Airlines. (AA 3344)
Duration: 1:42, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Codeshare Flights:
Alaska Airlines AS4001
08:15
Chicago O'Hare (ORD) 3

10:57
Buffalo (BUF)
Effective 2026-01-25 through 2026-02-08
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by American Airlines. (AA 3344)
Duration: 1:42, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Codeshare Flights:
Alaska Airlines AS4001
08:20
Miami (MIA)

10:53
Chicago O'Hare (ORD) 3
Effective 2026-01-03 through 2026-01-05
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 1972)
Duration: 3:33, non-stop
Boeing 737-800 (738)
Direct Codeshare Flights:
Alaska Airlines AS4001
08:30
Miami (MIA)

10:53
Chicago O'Hare (ORD) 3
Effective 2026-07-02 through 2026-08-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 1431)
Duration: 3:23, non-stop
Boeing 737-800 (738)
Direct Codeshare Flights:
Alaska Airlines AS4001
08:39
Miami (MIA)

11:06
Chicago O'Hare (ORD) 3
Operates only on 2026-01-18
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by American Airlines. (AA 1844)
Duration: 3:27, non-stop
Boeing 737-800 (738)
Direct Codeshare Flights:
Alaska Airlines AS4001
08:40
Miami (MIA)

11:03
Chicago O'Hare (ORD) 3
Effective from 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 1431)
Duration: 3:23, non-stop
Boeing 737-800 (738)
Direct Codeshare Flights:
Alaska Airlines AS4001
09:01
Miami (MIA)

11:31
Chicago O'Hare (ORD) 3
Effective 2026-05-21 through 2026-07-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 1431)
Duration: 3:30, non-stop
Boeing 737-800 (738)
Direct Codeshare Flights:
Alaska Airlines AS4001
09:09
Miami (MIA)

11:36
Chicago O'Hare (ORD) 3
Effective 2026-08-05 through 2026-09-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 1431)
Duration: 3:27, non-stop
Boeing 737-800 (738)
Direct Codeshare Flights:
Alaska Airlines AS4001
09:10
Miami (MIA)

11:33
Chicago O'Hare (ORD) 3
Effective 2026-09-09 through 2026-10-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 1431)
Duration: 3:23, non-stop
Boeing 737-800 (738)
Direct Codeshare Flights:
Alaska Airlines AS4001
10:16
Buffalo (BUF)

11:10
Chicago O'Hare (ORD) 3
Effective 2026-04-07 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 3497)
Duration: 1:54, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Codeshare Flights:
Alaska Airlines AS4001
14:50
Chicago O'Hare (ORD) 3

18:59
Miami (MIA)
Effective 2026-09-09 through 2026-10-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 1431)
Duration: 3:09, non-stop
Boeing 737-800 (738)
Direct Codeshare Flights:
Alaska Airlines AS4001
15:17
Chicago O'Hare (ORD) 3

19:24
Miami (MIA)
Effective 2026-05-21 through 2026-07-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 1431)
Duration: 3:07, non-stop
Boeing 737-800 (738)
Direct Codeshare Flights:
Alaska Airlines AS4001
19:54
Chicago O'Hare (ORD) 3

22:49
Buffalo (BUF)
Valid until 2026-01-02
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Codeshare flight, operated by American Airlines. (AA 4572)
Duration: 1:55, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4001
20:19
Chicago O'Hare (ORD) 3

22:57
Buffalo (BUF)
Operates only on 2026-01-01
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by American Airlines. (AA 1460)
Duration: 1:38, non-stop
Airbus A319 (319)
Direct Codeshare Flights:
Alaska Airlines AS4001
21:17
Dallas Fort Worth (DFW)

23:14
Birmingham (BHM)
Effective 2026-09-05 through 2026-09-08
Mon
Tue
Wed
-
Thu
-
Fri
-
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 3457)
Duration: 1:57, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4001
21:35
Dallas Fort Worth (DFW) E

23:24
Birmingham (BHM)
Effective 2026-02-12 through 2026-02-20
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by American Airlines. (AA 6194)
Duration: 1:49, non-stop
Canadair CRJ 700 (CR7)
Direct Codeshare Flights:
Alaska Airlines AS4001
21:35
Dallas Fort Worth (DFW) E

23:24
Birmingham (BHM)
Effective 2026-02-21 through 2026-03-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 6194)
Duration: 1:49, non-stop
Canadair CRJ 700 (CR7)
Direct Codeshare Flights:
Alaska Airlines AS4001
21:35
Dallas Fort Worth (DFW) E

23:28
Birmingham (BHM)
Effective 2026-03-08 through 2026-04-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 6194)
Duration: 1:53, non-stop
Canadair CRJ 700 (CR7)
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This flight number is listed as serving the following routes:
  • Chicago O'Hare (ORD) - Buffalo (BUF)
  • Dallas Fort Worth (DFW) - Birmingham (BHM)
  • Miami (MIA) - Chicago O'Hare (ORD)
All Alaska Airlines flights
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