American Airlines flight AA 3977: Multiple routes

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Daily 10:06 Chicago O'Hare (ORD) 3 12:32 Detroit (DTW) E
AA 3977 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:26 Effective 2026-08-05 through 2026-09-08
Daily 11:23 Phoenix Sky Harbor (PHX) 4 12:14 San Luis Obispo (SBP)
AA 3977 Non-stop Embraer EMB 175 (E75) 1:51 Effective 2026-01-06 through 2026-02-09
Wed 11:23 Phoenix Sky Harbor (PHX) 4 12:14 San Luis Obispo (SBP)
AA 3977 Non-stop Embraer EMB 175 (E75) 1:51 Operates only on 2026-02-11
Daily 12:50 San Luis Obispo (SBP) 15:32 Phoenix Sky Harbor (PHX) 4
AA 3977 Non-stop Embraer EMB 175 (E75) 1:42 Effective 2026-01-06 through 2026-02-09
Wed 12:50 San Luis Obispo (SBP) 15:32 Phoenix Sky Harbor (PHX) 4
AA 3977 Non-stop Embraer EMB 175 (E75) 1:42 Operates only on 2026-02-11
Daily 13:02 Detroit (DTW) E 13:33 Chicago O'Hare (ORD) 3
AA 3977 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:31 Effective 2026-08-05 through 2026-09-08
Daily 16:35 Phoenix Sky Harbor (PHX) 4 18:28 Monterey/Carmel (MRY)
AA 3977 Non-stop Embraer EMB 175 (E75) 1:53 Effective 2026-09-09 through 2026-10-04
Daily 16:35 Phoenix Sky Harbor (PHX) 4 18:32 Monterey/Carmel (MRY)
AA 3977 Non-stop Embraer EMB 175 (E75) 1:57 Effective from 2026-10-05
Mon,Thu,Fri 18:43 Chicago O'Hare (ORD) 3 21:25 Chattanooga (CHA)
AA 3977 Non-stop Embraer EMB 175 (E75) 1:42 Effective 2026-02-12 through 2026-02-16
Mon,Thu-Sun 18:43 Chicago O'Hare (ORD) 3 21:25 Chattanooga (CHA)
AA 3977 Non-stop Embraer EMB 175 (E75) 1:42 Effective 2026-02-19 through 2026-03-06
Sat 18:53 Chicago O'Hare (ORD) 3 21:35 Chattanooga (CHA)
AA 3977 Non-stop Embraer EMB 175 (E75) 1:42 Operates only on 2026-03-07
Sat 18:57 Chicago O'Hare (ORD) 3 21:36 Chattanooga (CHA)
AA 3977 Non-stop Embraer EMB 175 (E75) 1:39 Operates only on 2026-02-14
Daily 18:59 Chicago O'Hare (ORD) 3 21:51 Chattanooga (CHA)
AA 3977 Non-stop Embraer EMB 175 (E75) 1:52 Effective 2026-03-08 through 2026-04-06
Mon-Thu,Sun 19:22 Chicago O'Hare (ORD) 3 22:15 Chattanooga (CHA)
AA 3977 Non-stop Embraer EMB 175 (E75) 1:53 Valid until 2026-01-05
Daily 19:29 Monterey/Carmel (MRY) 21:20 Phoenix Sky Harbor (PHX) 4
AA 3977 Non-stop Embraer EMB 175 (E75) 1:51 Effective from 2026-10-05
Tue 21:00 Chicago O'Hare (ORD) 3 23:43 Chattanooga (CHA)
AA 3977 Non-stop Embraer EMB 175 (E75) 1:43 Effective 2026-02-17 through 2026-02-24
Tue,Wed 21:00 Chicago O'Hare (ORD) 3 23:43 Chattanooga (CHA)
AA 3977 Non-stop Embraer EMB 175 (E75) 1:43 Effective 2026-02-25 through 2026-03-04
This flight number is listed as serving the following routes:


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American Airlines flight AA 3977: Multiple routes
Select flight date:
FLIGHT SCHEDULE
Direct Flights:
American Airlines AA3977
10:06
Chicago O'Hare (ORD) 3

12:32
Detroit (DTW) E
Effective 2026-08-05 through 2026-09-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:26, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Flights:
American Airlines AA3977
11:23
Phoenix Sky Harbor (PHX) 4

12:14
San Luis Obispo (SBP)
Effective 2026-01-06 through 2026-02-09
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:51, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3977
11:23
Phoenix Sky Harbor (PHX) 4

12:14
San Luis Obispo (SBP)
Operates only on 2026-02-11
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:51, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3977
12:50
San Luis Obispo (SBP)

15:32
Phoenix Sky Harbor (PHX) 4
Effective 2026-01-06 through 2026-02-09
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:42, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3977
12:50
San Luis Obispo (SBP)

15:32
Phoenix Sky Harbor (PHX) 4
Operates only on 2026-02-11
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:42, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3977
13:02
Detroit (DTW) E

13:33
Chicago O'Hare (ORD) 3
Effective 2026-08-05 through 2026-09-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:31, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Flights:
American Airlines AA3977
16:35
Phoenix Sky Harbor (PHX) 4

18:28
Monterey/Carmel (MRY)
Effective 2026-09-09 through 2026-10-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:53, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3977
16:35
Phoenix Sky Harbor (PHX) 4

18:32
Monterey/Carmel (MRY)
Effective from 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:57, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3977
18:43
Chicago O'Hare (ORD) 3

21:25
Chattanooga (CHA)
Effective 2026-02-12 through 2026-02-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:42, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3977
18:43
Chicago O'Hare (ORD) 3

21:25
Chattanooga (CHA)
Effective 2026-02-19 through 2026-03-06
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
Duration: 1:42, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3977
18:53
Chicago O'Hare (ORD) 3

21:35
Chattanooga (CHA)
Operates only on 2026-03-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:42, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3977
18:57
Chicago O'Hare (ORD) 3

21:36
Chattanooga (CHA)
Operates only on 2026-02-14
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:39, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3977
18:59
Chicago O'Hare (ORD) 3

21:51
Chattanooga (CHA)
Effective 2026-03-08 through 2026-04-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:52, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3977
19:22
Chicago O'Hare (ORD) 3

22:15
Chattanooga (CHA)
Valid until 2026-01-05
Mon
Tue
Wed
Thu
Fri
-
Sat
-
Sun
Duration: 1:53, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3977
19:29
Monterey/Carmel (MRY)

21:20
Phoenix Sky Harbor (PHX) 4
Effective from 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:51, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3977
21:00
Chicago O'Hare (ORD) 3

23:43
Chattanooga (CHA)
Effective 2026-02-17 through 2026-02-24
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:43, non-stop
Embraer EMB 175 (E75)
Direct Flights:
American Airlines AA3977
21:00
Chicago O'Hare (ORD) 3

23:43
Chattanooga (CHA)
Effective 2026-02-25 through 2026-03-04
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:43, non-stop
Embraer EMB 175 (E75)
This flight number is listed as serving the following routes:
  • Chicago O'Hare (ORD) - Chattanooga (CHA)
  • Detroit (DTW) - Chicago O'Hare (ORD)
  • Monterey/Carmel (MRY) - Phoenix Sky Harbor (PHX)
  • Phoenix Sky Harbor (PHX) - San Luis Obispo (SBP)
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