American Airlines flight AA 4638: Multiple routes

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FLIGHT SCHEDULE
Direct Flights:
Thu 05:00 Kansas City (MCI) 06:53 Chicago O'Hare (ORD) 3
AA 4638 Non-stop Embraer EMB 175 (E75) 1:53 Operates only on 2025-06-05
Mon-Fri 06:30 Des Moines (DSM) 09:56 Ronald Reagan Washington (DCA) 2
AA 4638 Non-stop Embraer EMB 175 (E75) 2:26 Effective 2025-06-06 through 2025-07-03
Sat 07:34 Des Moines (DSM) 11:00 Ronald Reagan Washington (DCA) 2
AA 4638 Non-stop Embraer EMB 175 (E75) 2:26 Effective 2025-06-07 through 2025-06-28
Mon-Fri,Sun 08:30 Ronald Reagan Washington (DCA) 2 10:18 Boston Logan (BOS) B
AA 4638 Non-stop Embraer EMB 175 (E75) 1:48 Effective 2025-07-06 through 2025-08-05
Mon-Fri,Sun 10:52 Boston Logan (BOS) B 12:45 Ronald Reagan Washington (DCA) 2
AA 4638 Non-stop Embraer EMB 175 (E75) 1:53 Effective 2025-07-06 through 2025-08-05
Daily 13:10 Chicago O'Hare (ORD) 3 16:08 George Bush, Houston (IAH) A
AA 4638 Non-stop Embraer EMB 175 (E75) 2:58 Effective from 2026-02-12
Daily 17:09 George Bush, Houston (IAH) A 19:50 Chicago O'Hare (ORD) 3
AA 4638 Non-stop Embraer EMB 175 (E75) 2:41 Effective from 2026-02-12
Daily 18:39 Ronald Reagan Washington (DCA) 2 19:45 Pittsburgh (PIT)
AA 4638 Non-stop Embraer EMB 175 (E75) 1:06 Effective 2025-12-03 through 2025-12-17
Daily 20:15 Pittsburgh (PIT) 21:30 Ronald Reagan Washington (DCA) 2
AA 4638 Non-stop Embraer EMB 175 (E75) 1:15 Effective 2025-12-03 through 2025-12-17
Mon-Fri,Sun 21:15 Ronald Reagan Washington (DCA) 2 23:14 Jacksonville (JAX)
AA 4638 Non-stop Embraer EMB 175 (E75) 1:59 Effective 2025-05-05 through 2025-06-04
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This flight number is listed as serving the following routes:


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American Airlines flight AA 4638: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
American Airlines AA4638
05:00
Kansas City (MCI)

06:53
Chicago O'Hare (ORD) 3
Operates only on 2025-06-05
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:53, non-stop
Embraer EMB 175 (E75)
American Airlines AA4638
06:30
Des Moines (DSM)

09:56
Ronald Reagan Washington (DCA) 2
Effective 2025-06-06 through 2025-07-03
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 2:26, non-stop
Embraer EMB 175 (E75)
American Airlines AA4638
07:34
Des Moines (DSM)

11:00
Ronald Reagan Washington (DCA) 2
Effective 2025-06-07 through 2025-06-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:26, non-stop
Embraer EMB 175 (E75)
American Airlines AA4638
08:30
Ronald Reagan Washington (DCA) 2

10:18
Boston Logan (BOS) B
Effective 2025-07-06 through 2025-08-05
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:48, non-stop
Embraer EMB 175 (E75)
American Airlines AA4638
10:52
Boston Logan (BOS) B

12:45
Ronald Reagan Washington (DCA) 2
Effective 2025-07-06 through 2025-08-05
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:53, non-stop
Embraer EMB 175 (E75)
American Airlines AA4638
13:10
Chicago O'Hare (ORD) 3

16:08
George Bush, Houston (IAH) A
Effective from 2026-02-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:58, non-stop
Embraer EMB 175 (E75)
American Airlines AA4638
17:09
George Bush, Houston (IAH) A

19:50
Chicago O'Hare (ORD) 3
Effective from 2026-02-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:41, non-stop
Embraer EMB 175 (E75)
American Airlines AA4638
18:39
Ronald Reagan Washington (DCA) 2

19:45
Pittsburgh (PIT)
Effective 2025-12-03 through 2025-12-17
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:06, non-stop
Embraer EMB 175 (E75)
American Airlines AA4638
20:15
Pittsburgh (PIT)

21:30
Ronald Reagan Washington (DCA) 2
Effective 2025-12-03 through 2025-12-17
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:15, non-stop
Embraer EMB 175 (E75)
American Airlines AA4638
21:15
Ronald Reagan Washington (DCA) 2

23:14
Jacksonville (JAX)
Effective 2025-05-05 through 2025-06-04
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:59, non-stop
Embraer EMB 175 (E75)
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This flight number is listed as serving the following routes:
  • Boston Logan (BOS) - Ronald Reagan Washington (DCA)
  • Des Moines (DSM) - Ronald Reagan Washington (DCA)
  • George Bush, Houston (IAH) - Chicago O'Hare (ORD)
  • Kansas City (MCI) - Chicago O'Hare (ORD)
  • Ronald Reagan Washington (DCA) - Jacksonville (JAX)
  • Ronald Reagan Washington (DCA) - Pittsburgh (PIT)
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