American Airlines flight AA 4321: Chicago O'Hare - Waterloo

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FLIGHT SCHEDULE
Direct Flights:
Fri 17:15 Chicago O'Hare (ORD) 3 18:24 Waterloo (ALO)
AA 4321 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:09 Operates only on 2025-07-04
Daily 20:40 Chicago O'Hare (ORD) 3 22:01 Waterloo (ALO)
AA 4321 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:21 Effective from 2025-11-02
Tue,Wed 21:00 Chicago O'Hare (ORD) 3 22:19 Waterloo (ALO)
AA 4321 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:19 Effective 2025-07-01 through 2025-07-02
Daily 22:00 Chicago O'Hare (ORD) 3 23:18 Waterloo (ALO)
AA 4321 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:18 Effective 2025-10-06 through 2025-11-01
Daily 22:10 Chicago O'Hare (ORD) 3 23:29 Waterloo (ALO)
AA 4321 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:19 Effective 2025-06-05 through 2025-06-30
Thu 22:10 Chicago O'Hare (ORD) 3 23:29 Waterloo (ALO)
AA 4321 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:19 Operates only on 2025-07-03
Daily 22:10 Chicago O'Hare (ORD) 3 23:28 Waterloo (ALO)
AA 4321 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:18 Effective 2025-07-05 through 2025-10-05
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American Airlines flight AA 4321:
Chicago O'Hare - Waterloo
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
American Airlines AA4321
17:15
Chicago O'Hare (ORD) 3

18:24
Waterloo (ALO)
Operates only on 2025-07-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 1:09, non-stop
Embraer EMB 170 / EMB 175 (E70)
American Airlines AA4321
20:40
Chicago O'Hare (ORD) 3

22:01
Waterloo (ALO)
Effective from 2025-11-02
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:21, non-stop
Embraer EMB 170 / EMB 175 (E70)
American Airlines AA4321
21:00
Chicago O'Hare (ORD) 3

22:19
Waterloo (ALO)
Effective 2025-07-01 through 2025-07-02
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:19, non-stop
Embraer EMB 170 / EMB 175 (E70)
American Airlines AA4321
22:00
Chicago O'Hare (ORD) 3

23:18
Waterloo (ALO)
Effective 2025-10-06 through 2025-11-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:18, non-stop
Embraer EMB 170 / EMB 175 (E70)
American Airlines AA4321
22:10
Chicago O'Hare (ORD) 3

23:29
Waterloo (ALO)
Effective 2025-06-05 through 2025-06-30
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:19, non-stop
Embraer EMB 170 / EMB 175 (E70)
American Airlines AA4321
22:10
Chicago O'Hare (ORD) 3

23:29
Waterloo (ALO)
Operates only on 2025-07-03
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:19, non-stop
Embraer EMB 170 / EMB 175 (E70)
American Airlines AA4321
22:10
Chicago O'Hare (ORD) 3

23:28
Waterloo (ALO)
Effective 2025-07-05 through 2025-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:18, non-stop
Embraer EMB 170 / EMB 175 (E70)
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  • AA 4321 is a domestic flight departing from the Chicago O'Hare airport (ORD) and arriving at Waterloo airport (ALO).
  • The flight distance is 233 miles, or 375 km.
  • The timezone of both the departure and the arrival airports is UTC-6 . Current time at both airports is (loading...).
  • For direct flights, the flight time varies between 1:09 and 1:21.
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