American Airlines flight AA 4603: Multiple routes

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FLIGHT SCHEDULE
Direct Flights:
Mon,Thu,Fri 06:00 Columbia (CAE) 07:59 New York LaGuardia (LGA) B
AA 4603 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:59 Effective 2026-03-09 through 2026-04-06
Tue,Wed 06:49 Columbia (CAE) 08:49 New York LaGuardia (LGA) B
AA 4603 Non-stop Embraer EMB 170 / EMB 175 (E70) 2:00 Effective 2026-03-10 through 2026-04-01
Daily 10:58 Buffalo (BUF) 12:19 New York LaGuardia (LGA) B
AA 4603 Non-stop Embraer EMB 175 (E75) 1:21 Effective 2026-04-07 through 2026-05-06
Daily 11:28 Buffalo (BUF) 12:48 New York LaGuardia (LGA) B
AA 4603 Non-stop Embraer EMB 175 (E75) 1:20 Effective 2026-05-07 through 2026-05-20
Sat 17:36 Ronald Reagan Washington (DCA) 2 19:09 Chicago O'Hare (ORD) 3
AA 4603 Non-stop Embraer EMB 175 (E75) 2:33 Effective 2026-02-14 through 2026-03-07
Sun 17:52 Ronald Reagan Washington (DCA) 2 19:25 Chicago O'Hare (ORD) 3
AA 4603 Non-stop Embraer EMB 175 (E75) 2:33 Effective 2026-02-15 through 2026-03-01
Mon-Fri 17:59 Ronald Reagan Washington (DCA) 2 19:32 Chicago O'Hare (ORD) 3
AA 4603 Non-stop Embraer EMB 175 (E75) 2:33 Effective 2026-02-12 through 2026-03-06
Daily 20:20 Chicago O'Hare (ORD) 3 22:59 Louisville (SDF)
AA 4603 Non-stop Embraer EMB 175 (E75) 1:39 Effective 2026-05-21 through 2026-07-01
Daily 20:20 Chicago O'Hare (ORD) 3 23:03 Louisville (SDF)
AA 4603 Non-stop Embraer EMB 175 (E75) 1:43 Effective 2026-07-02 through 2026-08-04
Daily 20:20 Chicago O'Hare (ORD) 3 23:01 Louisville (SDF)
AA 4603 Non-stop Embraer EMB 175 (E75) 1:41 Effective 2026-08-05 through 2026-09-08
Daily 20:20 Chicago O'Hare (ORD) 3 22:58 Louisville (SDF)
AA 4603 Non-stop Embraer EMB 175 (E75) 1:38 Effective 2026-09-09 through 2026-10-04
Daily 20:20 Chicago O'Hare (ORD) 3 22:55 Louisville (SDF)
AA 4603 Non-stop Embraer EMB 175 (E75) 1:35 Effective from 2026-10-05
Sat 20:34 Chicago O'Hare (ORD) 3 23:16 Louisville (SDF)
AA 4603 Non-stop Embraer EMB 175 (E75) 1:42 Operates only on 2026-01-03
Mon-Fri,Sun 20:49 Chicago O'Hare (ORD) 3 23:19 Louisville (SDF)
AA 4603 Non-stop Embraer EMB 175 (E75) 1:30 Effective 2026-01-06 through 2026-02-11
Mon,Tue,Thu,Fri,Sun 20:53 Chicago O'Hare (ORD) 3 23:30 Louisville (SDF)
AA 4603 Non-stop Embraer EMB 175 (E75) 1:37 Valid until 2026-01-05
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This flight number is listed as serving the following routes:


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American Airlines flight AA 4603: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
American Airlines AA4603
06:00
Columbia (CAE)

07:59
New York LaGuardia (LGA) B
Effective 2026-03-09 through 2026-04-06
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:59, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Flights:
American Airlines AA4603
06:49
Columbia (CAE)

08:49
New York LaGuardia (LGA) B
Effective 2026-03-10 through 2026-04-01
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:00, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Flights:
American Airlines AA4603
10:58
Buffalo (BUF)

12:19
New York LaGuardia (LGA) B
Effective 2026-04-07 through 2026-05-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:21, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4603
11:28
Buffalo (BUF)

12:48
New York LaGuardia (LGA) B
Effective 2026-05-07 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:20, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4603
17:36
Ronald Reagan Washington (DCA) 2

19:09
Chicago O'Hare (ORD) 3
Effective 2026-02-14 through 2026-03-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:33, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4603
17:52
Ronald Reagan Washington (DCA) 2

19:25
Chicago O'Hare (ORD) 3
Effective 2026-02-15 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:33, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4603
17:59
Ronald Reagan Washington (DCA) 2

19:32
Chicago O'Hare (ORD) 3
Effective 2026-02-12 through 2026-03-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 2:33, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4603
20:20
Chicago O'Hare (ORD) 3

22:59
Louisville (SDF)
Effective 2026-05-21 through 2026-07-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:39, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4603
20:20
Chicago O'Hare (ORD) 3

23:03
Louisville (SDF)
Effective 2026-07-02 through 2026-08-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:43, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4603
20:20
Chicago O'Hare (ORD) 3

23:01
Louisville (SDF)
Effective 2026-08-05 through 2026-09-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:41, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4603
20:20
Chicago O'Hare (ORD) 3

22:58
Louisville (SDF)
Effective 2026-09-09 through 2026-10-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:38, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4603
20:20
Chicago O'Hare (ORD) 3

22:55
Louisville (SDF)
Effective from 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:35, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4603
20:34
Chicago O'Hare (ORD) 3

23:16
Louisville (SDF)
Operates only on 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:42, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4603
20:49
Chicago O'Hare (ORD) 3

23:19
Louisville (SDF)
Effective 2026-01-06 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:30, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4603
20:53
Chicago O'Hare (ORD) 3

23:30
Louisville (SDF)
Valid until 2026-01-05
Mon
Tue
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 1:37, non-stop
Embraer EMB 175 (E75)
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This flight number is listed as serving the following routes:
  • Buffalo (BUF) - New York LaGuardia (LGA)
  • Chicago O'Hare (ORD) - Louisville (SDF)
  • Columbia (CAE) - New York LaGuardia (LGA)
  • Ronald Reagan Washington (DCA) - Chicago O'Hare (ORD)
All American Airlines flights
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