American Airlines flight AA 3645: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Mon,Thu-Sun 08:09 Chicago O'Hare (ORD) 3 10:14 Grand Rapids (GRR)
AA 3645 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:05 Effective 2026-03-08 through 2026-04-06
Daily 08:35 Miami (MIA) 09:45 Nassau (NAS) B
AA 3645 Non-stop Embraer EMB 175 (E75) 1:10 Effective 2026-09-09 through 2026-10-04
Daily 11:25 Nassau (NAS) C 12:30 Miami (MIA)
AA 3645 Non-stop Embraer EMB 175 (E75) 1:05 Effective 2026-09-09 through 2026-10-04
Daily 12:40 Phoenix Sky Harbor (PHX) 4 17:05 Tulsa (TUL)
AA 3645 Non-stop Embraer EMB 175 (E75) 2:25 Effective 2026-08-05 through 2026-09-08
Daily 13:53 Dallas Fort Worth (DFW) 15:50 Peoria (PIA)
AA 3645 Non-stop Embraer EMB 175 (E75) 1:57 Valid until 2026-01-05
Daily 14:50 Chicago O'Hare (ORD) 3 16:02 La Crosse (LSE)
AA 3645 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:12 Effective 2026-05-21 through 2026-07-01
Mon,Tue,Thu-Sun 16:20 Peoria (PIA) 18:48 Dallas Fort Worth (DFW)
AA 3645 Non-stop Embraer EMB 175 (E75) 2:28 Valid until 2026-01-05
Daily 16:35 Dallas Fort Worth (DFW) 18:01 Laredo (LRD)
AA 3645 Non-stop Embraer EMB 175 (E75) 1:26 Effective 2026-07-02 through 2026-08-04
Daily 16:40 La Crosse (LSE) 18:00 Chicago O'Hare (ORD) 3
AA 3645 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:20 Effective 2026-05-21 through 2026-07-01
Daily 18:31 Laredo (LRD) 20:00 Dallas Fort Worth (DFW)
AA 3645 Non-stop Embraer EMB 175 (E75) 1:29 Effective 2026-07-02 through 2026-08-04
Daily 18:50 Dallas Fort Worth (DFW) 20:02 Houston Hobby (HOU)
AA 3645 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:12 Effective 2026-04-07 through 2026-05-20
Daily 19:09 Tulsa (TUL) 19:49 Phoenix Sky Harbor (PHX) 4
AA 3645 Non-stop Embraer EMB 175 (E75) 2:40 Effective 2026-08-05 through 2026-09-08
Daily 20:27 Houston Hobby (HOU) 21:50 Dallas Fort Worth (DFW)
AA 3645 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:23 Effective 2026-04-07 through 2026-05-20
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This flight number is listed as serving the following routes:


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American Airlines flight AA 3645: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
American Airlines AA3645
08:09
Chicago O'Hare (ORD) 3

10:14
Grand Rapids (GRR)
Effective 2026-03-08 through 2026-04-06
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
Duration: 1:05, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Flights:
American Airlines AA3645
08:35
Miami (MIA)

09:45
Nassau (NAS) B
Effective 2026-09-09 through 2026-10-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:10, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3645
11:25
Nassau (NAS) C

12:30
Miami (MIA)
Effective 2026-09-09 through 2026-10-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:05, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3645
12:40
Phoenix Sky Harbor (PHX) 4

17:05
Tulsa (TUL)
Effective 2026-08-05 through 2026-09-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:25, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3645
13:53
Dallas Fort Worth (DFW)

15:50
Peoria (PIA)
Valid until 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:57, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3645
14:50
Chicago O'Hare (ORD) 3

16:02
La Crosse (LSE)
Effective 2026-05-21 through 2026-07-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:12, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Flights:
American Airlines AA3645
16:20
Peoria (PIA)

18:48
Dallas Fort Worth (DFW)
Valid until 2026-01-05
Mon
Tue
Wed
-
Thu
Fri
Sat
Sun
Duration: 2:28, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3645
16:35
Dallas Fort Worth (DFW)

18:01
Laredo (LRD)
Effective 2026-07-02 through 2026-08-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:26, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3645
16:40
La Crosse (LSE)

18:00
Chicago O'Hare (ORD) 3
Effective 2026-05-21 through 2026-07-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:20, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Flights:
American Airlines AA3645
18:31
Laredo (LRD)

20:00
Dallas Fort Worth (DFW)
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 AA3645
18:50
Dallas Fort Worth (DFW)

20:02
Houston Hobby (HOU)
Effective 2026-04-07 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:12, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Flights:
American Airlines AA3645
19:09
Tulsa (TUL)

19:49
Phoenix Sky Harbor (PHX) 4
Effective 2026-08-05 through 2026-09-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:40, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3645
20:27
Houston Hobby (HOU)

21:50
Dallas Fort Worth (DFW)
Effective 2026-04-07 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:23, non-stop
Embraer EMB 170 / EMB 175 (E70)
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This flight number is listed as serving the following routes:
  • Chicago O'Hare (ORD) - Grand Rapids (GRR)
  • Chicago O'Hare (ORD) - La Crosse (LSE)
  • Dallas Fort Worth (DFW) - Houston Hobby (HOU)
  • Dallas Fort Worth (DFW) - Peoria (PIA)
  • Laredo (LRD) - Dallas Fort Worth (DFW)
  • Miami (MIA) - Nassau (NAS)
  • Tulsa (TUL) - Phoenix Sky Harbor (PHX)
All American Airlines flights
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