American Airlines flight AA 3644: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Mon,Tue,Fri 06:27 Birmingham (BHM) 08:46 Chicago O'Hare (ORD) 3
AA 3644 Non-stop Embraer EMB 170 / EMB 175 (E70) 2:19 Effective 2026-01-09 through 2026-02-10
Wed,Thu 06:40 Birmingham (BHM) 08:59 Chicago O'Hare (ORD) 3
AA 3644 Non-stop Embraer EMB 170 / EMB 175 (E70) 2:19 Effective 2026-01-07 through 2026-02-11
Tue 08:00 Birmingham (BHM) 10:19 Chicago O'Hare (ORD) 3
AA 3644 Non-stop Embraer EMB 175 (E75) 2:19 Operates only on 2026-01-06
Daily 08:08 Dallas Fort Worth (DFW) 09:30 Houston Hobby (HOU)
AA 3644 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:22 Effective 2026-04-07 through 2026-05-20
Daily 08:08 Dallas Fort Worth (DFW) 09:36 Laredo (LRD)
AA 3644 Non-stop Embraer EMB 175 (E75) 1:28 Effective 2026-05-21 through 2026-07-01
Daily 10:06 Laredo (LRD) 11:39 Dallas Fort Worth (DFW)
AA 3644 Non-stop Embraer EMB 175 (E75) 1:33 Effective 2026-05-21 through 2026-07-01
Daily 10:18 Houston Hobby (HOU) 11:39 Dallas Fort Worth (DFW)
AA 3644 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:21 Effective 2026-04-07 through 2026-05-20
Mon-Fri,Sun 10:21 Ronald Reagan Washington (DCA) 2 11:52 Cleveland (CLE)
AA 3644 Non-stop Embraer EMB 175 (E75) 1:31 Effective 2026-03-08 through 2026-04-06
Daily 12:19 Dallas Fort Worth (DFW) 13:48 Laredo (LRD)
AA 3644 Non-stop Embraer EMB 175 (E75) 1:29 Effective 2026-07-02 through 2026-08-04
Mon-Fri,Sun 12:22 Cleveland (CLE) 13:44 Ronald Reagan Washington (DCA) 2
AA 3644 Non-stop Embraer EMB 175 (E75) 1:22 Effective 2026-03-08 through 2026-04-06
Daily 13:20 Chicago O'Hare (ORD) 3 15:16 Tulsa (TUL)
AA 3644 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:56 Effective 2026-08-05 through 2026-09-08
Daily 14:24 Laredo (LRD) 15:55 Dallas Fort Worth (DFW)
AA 3644 Non-stop Embraer EMB 175 (E75) 1:31 Effective 2026-07-02 through 2026-08-04
Daily 15:46 Tulsa (TUL) 17:52 Chicago O'Hare (ORD) 3
AA 3644 Non-stop Embraer EMB 170 / EMB 175 (E70) 2:06 Effective 2026-08-05 through 2026-09-08
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This flight number is listed as serving the following routes:


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American Airlines flight AA 3644: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
American Airlines AA3644
06:27
Birmingham (BHM)

08:46
Chicago O'Hare (ORD) 3
Effective 2026-01-09 through 2026-02-10
Mon
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 2:19, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Flights:
American Airlines AA3644
06:40
Birmingham (BHM)

08:59
Chicago O'Hare (ORD) 3
Effective 2026-01-07 through 2026-02-11
Mon
-
Tue
-
Wed
Thu
Fri
-
Sat
-
Sun
-
Duration: 2:19, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Flights:
American Airlines AA3644
08:00
Birmingham (BHM)

10:19
Chicago O'Hare (ORD) 3
Operates only on 2026-01-06
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:19, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3644
08:08
Dallas Fort Worth (DFW)

09:30
Houston Hobby (HOU)
Effective 2026-04-07 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:22, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Flights:
American Airlines AA3644
08:08
Dallas Fort Worth (DFW)

09:36
Laredo (LRD)
Effective 2026-05-21 through 2026-07-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:28, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3644
10:06
Laredo (LRD)

11:39
Dallas Fort Worth (DFW)
Effective 2026-05-21 through 2026-07-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:33, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3644
10:18
Houston Hobby (HOU)

11:39
Dallas Fort Worth (DFW)
Effective 2026-04-07 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:21, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Flights:
American Airlines AA3644
10:21
Ronald Reagan Washington (DCA) 2

11:52
Cleveland (CLE)
Effective 2026-03-08 through 2026-04-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:31, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3644
12:19
Dallas Fort Worth (DFW)

13:48
Laredo (LRD)
Effective 2026-07-02 through 2026-08-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:29, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3644
12:22
Cleveland (CLE)

13:44
Ronald Reagan Washington (DCA) 2
Effective 2026-03-08 through 2026-04-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:22, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3644
13:20
Chicago O'Hare (ORD) 3

15:16
Tulsa (TUL)
Effective 2026-08-05 through 2026-09-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:56, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Flights:
American Airlines AA3644
14:24
Laredo (LRD)

15:55
Dallas Fort Worth (DFW)
Effective 2026-07-02 through 2026-08-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:31, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3644
15:46
Tulsa (TUL)

17:52
Chicago O'Hare (ORD) 3
Effective 2026-08-05 through 2026-09-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:06, non-stop
Embraer EMB 170 / EMB 175 (E70)
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This flight number is listed as serving the following routes:
  • Birmingham (BHM) - Chicago O'Hare (ORD)
  • Chicago O'Hare (ORD) - Tulsa (TUL)
  • Dallas Fort Worth (DFW) - Houston Hobby (HOU)
  • Laredo (LRD) - Dallas Fort Worth (DFW)
  • Ronald Reagan Washington (DCA) - Cleveland (CLE)
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