American Airlines flight AA 4340: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Daily 05:49 Indianapolis (IND) 06:10 Chicago O'Hare (ORD) 3
AA 4340 Non-stop Embraer EMB 175 (E75) 1:21 Effective 2026-05-21 through 2026-08-04
Sat 06:00 Buffalo (BUF) 07:15 Chicago O'Hare (ORD) 3
AA 4340 Non-stop Embraer EMB 175 (E75) 2:15 Effective 2026-03-14 through 2026-04-04
Mon-Fri 06:05 Buffalo (BUF) 07:20 Chicago O'Hare (ORD) 3
AA 4340 Non-stop Embraer EMB 175 (E75) 2:15 Effective 2026-03-09 through 2026-04-06
Daily 06:56 Indianapolis (IND) 07:21 Chicago O'Hare (ORD) 3
AA 4340 Non-stop Embraer EMB 175 (E75) 1:25 Effective 2026-08-05 through 2026-09-08
Daily 10:34 Philadelphia (PHL) 11:40 Ronald Reagan Washington (DCA) 2
AA 4340 Non-stop Embraer EMB 175 (E75) 1:06 Effective 2026-04-07 through 2026-05-20
Daily 11:12 Cincinnati (CVG) 12:55 Philadelphia (PHL)
AA 4340 Non-stop Embraer EMB 175 (E75) 1:43 Effective from 2026-10-05
Sat 12:48 Boston Logan (BOS) B 14:31 Philadelphia (PHL)
AA 4340 Non-stop Embraer EMB 175 (E75) 1:43 Operates only on 2026-01-10
Mon-Fri,Sun 12:56 Boston Logan (BOS) B 14:39 Philadelphia (PHL)
AA 4340 Non-stop Embraer EMB 175 (E75) 1:43 Effective 2026-01-06 through 2026-01-16
Daily 12:56 Boston Logan (BOS) B 14:39 Philadelphia (PHL)
AA 4340 Non-stop Embraer EMB 175 (E75) 1:43 Effective 2026-01-17 through 2026-02-11
Mon-Sat 15:51 Boston Logan (BOS) B 17:34 Philadelphia (PHL)
AA 4340 Non-stop Embraer EMB 175 (E75) 1:43 Effective 2026-02-12 through 2026-03-07
Sun 16:10 Boston Logan (BOS) B 17:53 Philadelphia (PHL)
AA 4340 Non-stop Embraer EMB 175 (E75) 1:43 Effective 2026-02-15 through 2026-03-01
Daily 18:12 Norfolk (ORF) 19:50 Chicago O'Hare (ORD) 3
AA 4340 Non-stop Embraer EMB 175 (E75) 2:38 Effective 2026-09-09 through 2026-10-04
Mon 21:54 Chicago O'Hare (ORD) 3 00:59 Ronald Reagan Washington (DCA) 2
AA 4340 Non-stop Embraer EMB 175 (E75) 2:05 Operates only on 2026-01-05
The flight arrives 1 day after departure.
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This flight number is listed as serving the following routes:


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American Airlines flight AA 4340: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
American Airlines AA4340
05:49
Indianapolis (IND)

06:10
Chicago O'Hare (ORD) 3
Effective 2026-05-21 through 2026-08-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:21, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4340
06:00
Buffalo (BUF)

07:15
Chicago O'Hare (ORD) 3
Effective 2026-03-14 through 2026-04-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:15, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4340
06:05
Buffalo (BUF)

07:20
Chicago O'Hare (ORD) 3
Effective 2026-03-09 through 2026-04-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 2:15, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4340
06:56
Indianapolis (IND)

07:21
Chicago O'Hare (ORD) 3
Effective 2026-08-05 through 2026-09-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:25, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4340
10:34
Philadelphia (PHL)

11:40
Ronald Reagan Washington (DCA) 2
Effective 2026-04-07 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:06, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4340
11:12
Cincinnati (CVG)

12:55
Philadelphia (PHL)
Effective from 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:43, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4340
12:48
Boston Logan (BOS) B

14:31
Philadelphia (PHL)
Operates only on 2026-01-10
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:43, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4340
12:56
Boston Logan (BOS) B

14:39
Philadelphia (PHL)
Effective 2026-01-06 through 2026-01-16
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:43, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4340
12:56
Boston Logan (BOS) B

14:39
Philadelphia (PHL)
Effective 2026-01-17 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:43, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4340
15:51
Boston Logan (BOS) B

17:34
Philadelphia (PHL)
Effective 2026-02-12 through 2026-03-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
-
Duration: 1:43, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4340
16:10
Boston Logan (BOS) B

17:53
Philadelphia (PHL)
Effective 2026-02-15 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:43, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4340
18:12
Norfolk (ORF)

19:50
Chicago O'Hare (ORD) 3
Effective 2026-09-09 through 2026-10-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:38, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA4340
21:54
Chicago O'Hare (ORD) 3

00:59(+1)
Ronald Reagan Washington (DCA) 2
Operates only on 2026-01-05
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:05, non-stop
Embraer EMB 175 (E75)
The flight arrives 1 day after departure.
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This flight number is listed as serving the following routes:
  • Boston Logan (BOS) - Philadelphia (PHL)
  • Buffalo (BUF) - Chicago O'Hare (ORD)
  • Chicago O'Hare (ORD) - Ronald Reagan Washington (DCA)
  • Cincinnati (CVG) - Philadelphia (PHL)
  • Indianapolis (IND) - Chicago O'Hare (ORD)
  • Norfolk (ORF) - Chicago O'Hare (ORD)
  • Philadelphia (PHL) - Ronald Reagan Washington (DCA)
All American Airlines flights
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