ANA flight NH 7591: Saint Louis - Chicago O'Hare

Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Mon-Wed,Fri-Sun 06:30 Saint Louis (STL) 1 08:05 Chicago O'Hare (ORD) 2
NH 7591 Non-stop Canadair CRJ 550 (CR5) 1:35 Valid until 2026-01-07
Codeshare flight, operated by United Airlines.(UA 4423)
Daily 06:30 Saint Louis (STL) 1 08:05 Chicago O'Hare (ORD) 2
NH 7591 Non-stop Canadair CRJ 550 (CR5) 1:35 Effective 2026-01-08 through 2026-02-03
Codeshare flight, operated by United Airlines.(UA 4423)
Daily 06:30 Saint Louis (STL) 1 08:05 Chicago O'Hare (ORD) 2
NH 7591 Non-stop Canadair CRJ 550 (CR5) 1:35 Effective 2026-02-05 through 2026-02-11
Codeshare flight, operated by United Airlines.(UA 4423)
Thu 06:30 Saint Louis (STL) 1 08:03 Chicago O'Hare (ORD) 2
NH 7591 Non-stop Canadair CRJ 550 (CR5) 1:33 Operates only on 2026-02-12
Codeshare flight, operated by United Airlines.(UA 4423)
Daily 06:40 Saint Louis (STL) 1 08:00 Chicago O'Hare (ORD) 2
NH 7591 Non-stop Canadair CRJ 550 (CR5) 1:20 Effective from 2026-10-25
Codeshare flight, operated by United Airlines.(UA 4423)
Mon,Tue 07:40 Saint Louis (STL) 1 09:09 Chicago O'Hare (ORD) 1
NH 7591 Non-stop Boeing 737-900 (739) 1:29 Effective 2026-03-09 through 2026-03-10
Codeshare flight, operated by United Airlines.(UA 2138)
Mon,Wed 07:40 Saint Louis (STL) 1 09:09 Chicago O'Hare (ORD) 1
NH 7591 Non-stop Boeing 737-900 (739) 1:29 Effective 2026-03-23 through 2026-03-25
Codeshare flight, operated by United Airlines.(UA 2138)
Mon,Tue,Thu-Sun 07:41 Saint Louis (STL) 1 09:10 Chicago O'Hare (ORD) 1
NH 7591 Non-stop Airbus A319 (319) 1:29 Effective 2026-02-14 through 2026-02-20
Codeshare flight, operated by United Airlines.(UA 1612)
Mon-Wed,Fri-Sun 07:41 Saint Louis (STL) 1 09:10 Chicago O'Hare (ORD) 1
NH 7591 Non-stop Airbus A319 (319) 1:29 Effective 2026-02-22 through 2026-02-28
Codeshare flight, operated by United Airlines.(UA 1612)
Mon-Wed 07:41 Saint Louis (STL) 1 09:10 Chicago O'Hare (ORD) 1
NH 7591 Non-stop Airbus A319 (319) 1:29 Effective 2026-03-02 through 2026-03-04
Codeshare flight, operated by United Airlines.(UA 1612)
Thu,Sat 07:41 Saint Louis (STL) 1 09:10 Chicago O'Hare (ORD) 1
NH 7591 Non-stop Boeing 737-900 (739) 1:29 Effective 2026-03-05 through 2026-03-12
Codeshare flight, operated by United Airlines.(UA 2138)
Sun 07:41 Saint Louis (STL) 1 09:10 Chicago O'Hare (ORD) 1
NH 7591 Non-stop Boeing 737-700 (73G) 1:29 Operates only on 2026-03-15
Codeshare flight, operated by United Airlines.(UA 2138)
Fri 07:41 Saint Louis (STL) 1 09:10 Chicago O'Hare (ORD) 1
NH 7591 Non-stop Boeing 737-900 (739) 1:29 Operates only on 2026-03-20
Codeshare flight, operated by United Airlines.(UA 2138)
Sat 07:41 Saint Louis (STL) 1 09:10 Chicago O'Hare (ORD) 1
NH 7591 Non-stop Boeing 737-900 (739) 1:29 Operates only on 2026-03-28
Codeshare flight, operated by United Airlines.(UA 2138)
Thu,Fri,Sun 07:45 Saint Louis (STL) 1 09:11 Chicago O'Hare (ORD) 1
NH 7591 Non-stop Airbus A319 (319) 1:26 Effective 2026-04-02 through 2026-04-09
Codeshare flight, operated by United Airlines.(UA 473)
Mon,Wed,Thu,Sat,Sun 07:45 Saint Louis (STL) 1 09:11 Chicago O'Hare (ORD) 1
NH 7591 Non-stop Airbus A319 (319) 1:26 Effective 2026-04-11 through 2026-04-16
Codeshare flight, operated by United Airlines.(UA 473)
Mon,Wed-Fri,Sun 07:45 Saint Louis (STL) 1 09:11 Chicago O'Hare (ORD) 1
NH 7591 Non-stop Airbus A319 (319) 1:26 Effective 2026-04-19 through 2026-04-26
Codeshare flight, operated by United Airlines.(UA 473)
Tue 07:45 Saint Louis (STL) 1 09:11 Chicago O'Hare (ORD) 1
NH 7591 Non-stop Airbus A319 (319) 1:26 Operates only on 2026-04-28
Codeshare flight, operated by United Airlines.(UA 473)
Wed,Fri 08:17 Saint Louis (STL) 1 09:50 Chicago O'Hare (ORD) 2
NH 7591 Non-stop Canadair CRJ 550 (CR5) 1:33 Effective 2026-02-13 through 2026-02-18
Codeshare flight, operated by United Airlines.(UA 4608)
Thu,Sat 08:17 Saint Louis (STL) 1 09:50 Chicago O'Hare (ORD) 2
NH 7591 Non-stop Canadair CRJ 550 (CR5) 1:33 Effective 2026-02-21 through 2026-02-26
Codeshare flight, operated by United Airlines.(UA 4608)
Fri,Sun 08:17 Saint Louis (STL) 1 09:50 Chicago O'Hare (ORD) 2
NH 7591 Non-stop Canadair CRJ 550 (CR5) 1:33 Effective 2026-03-01 through 2026-03-06
Codeshare flight, operated by United Airlines.(UA 4608)
Tue,Sat 08:17 Saint Louis (STL) 1 09:50 Chicago O'Hare (ORD) 2
NH 7591 Non-stop Canadair CRJ 550 (CR5) 1:33 Effective 2026-03-17 through 2026-03-21
Codeshare flight, operated by United Airlines.(UA 4608)
Mon-Wed,Sat,Sun 08:26 Saint Louis (STL) 1 09:55 Chicago O'Hare (ORD) 2
NH 7591 Non-stop Canadair CRJ 550 (CR5) 1:29 Effective 2026-03-29 through 2026-04-04
Codeshare flight, operated by United Airlines.(UA 4608)
Mon-Wed,Fri 08:26 Saint Louis (STL) 1 09:55 Chicago O'Hare (ORD) 2
NH 7591 Non-stop Canadair CRJ 550 (CR5) 1:29 Effective 2026-04-06 through 2026-04-10
Codeshare flight, operated by United Airlines.(UA 4608)
Tue,Fri,Sat 08:26 Saint Louis (STL) 1 09:55 Chicago O'Hare (ORD) 2
NH 7591 Non-stop Canadair CRJ 550 (CR5) 1:29 Effective 2026-04-14 through 2026-04-21
Codeshare flight, operated by United Airlines.(UA 4608)
Mon,Wed,Sat 08:26 Saint Louis (STL) 1 09:55 Chicago O'Hare (ORD) 2
NH 7591 Non-stop Canadair CRJ 550 (CR5) 1:29 Effective 2026-04-25 through 2026-04-29
Codeshare flight, operated by United Airlines.(UA 4608)
Daily 09:30 Saint Louis (STL) 1 10:57 Chicago O'Hare (ORD) 2
NH 7591 Non-stop Canadair CRJ 550 (CR5) 1:27 Effective 2026-04-30 through 2026-05-20
Codeshare flight, operated by United Airlines.(UA 4601)
Daily 09:30 Saint Louis (STL) 1 10:58 Chicago O'Hare (ORD) 2
NH 7591 Non-stop Canadair CRJ 550 (CR5) 1:28 Effective 2026-05-21 through 2026-10-24
Codeshare flight, operated by United Airlines.(UA 4601)
Wed,Fri-Sun 11:25 Saint Louis (STL) 1 12:58 Chicago O'Hare (ORD) 2
NH 7591 Non-stop Canadair CRJ 550 (CR5) 1:33 Effective 2026-03-08 through 2026-03-14
Codeshare flight, operated by United Airlines.(UA 4395)
Mon,Wed,Thu,Sun 11:25 Saint Louis (STL) 1 12:58 Chicago O'Hare (ORD) 2
NH 7591 Non-stop Canadair CRJ 550 (CR5) 1:33 Effective 2026-03-16 through 2026-03-22
Codeshare flight, operated by United Airlines.(UA 4395)
Tue,Thu,Fri 11:25 Saint Louis (STL) 1 12:58 Chicago O'Hare (ORD) 2
NH 7591 Non-stop Canadair CRJ 550 (CR5) 1:33 Effective 2026-03-24 through 2026-03-27
Codeshare flight, operated by United Airlines.(UA 4395)


Feedback - Disclaimer - Privacy
FlightMapper.net Flight Search Countries Airlines
LANGUAGES
ANA flight NH 7591:
Saint Louis - Chicago O'Hare
Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
ANA NH7591
06:30
Saint Louis (STL) 1

08:05
Chicago O'Hare (ORD) 2
Valid until 2026-01-07
Mon
Tue
Wed
Thu
-
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4423)
Duration: 1:35, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7591
06:30
Saint Louis (STL) 1

08:05
Chicago O'Hare (ORD) 2
Effective 2026-01-08 through 2026-02-03
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4423)
Duration: 1:35, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7591
06:30
Saint Louis (STL) 1

08:05
Chicago O'Hare (ORD) 2
Effective 2026-02-05 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4423)
Duration: 1:35, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7591
06:30
Saint Louis (STL) 1

08:03
Chicago O'Hare (ORD) 2
Operates only on 2026-02-12
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by United Airlines. (UA 4423)
Duration: 1:33, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7591
06:40
Saint Louis (STL) 1

08:00
Chicago O'Hare (ORD) 2
Effective from 2026-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4423)
Duration: 1:20, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7591
07:40
Saint Louis (STL) 1

09:09
Chicago O'Hare (ORD) 1
Effective 2026-03-09 through 2026-03-10
Mon
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by United Airlines. (UA 2138)
Duration: 1:29, non-stop
Boeing 737-900 (739)
Direct Codeshare Flights:
ANA NH7591
07:40
Saint Louis (STL) 1

09:09
Chicago O'Hare (ORD) 1
Effective 2026-03-23 through 2026-03-25
Mon
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by United Airlines. (UA 2138)
Duration: 1:29, non-stop
Boeing 737-900 (739)
Direct Codeshare Flights:
ANA NH7591
07:41
Saint Louis (STL) 1

09:10
Chicago O'Hare (ORD) 1
Effective 2026-02-14 through 2026-02-20
Mon
Tue
Wed
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 1612)
Duration: 1:29, non-stop
Airbus A319 (319)
Direct Codeshare Flights:
ANA NH7591
07:41
Saint Louis (STL) 1

09:10
Chicago O'Hare (ORD) 1
Effective 2026-02-22 through 2026-02-28
Mon
Tue
Wed
Thu
-
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 1612)
Duration: 1:29, non-stop
Airbus A319 (319)
Direct Codeshare Flights:
ANA NH7591
07:41
Saint Louis (STL) 1

09:10
Chicago O'Hare (ORD) 1
Effective 2026-03-02 through 2026-03-04
Mon
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by United Airlines. (UA 1612)
Duration: 1:29, non-stop
Airbus A319 (319)
Direct Codeshare Flights:
ANA NH7591
07:41
Saint Louis (STL) 1

09:10
Chicago O'Hare (ORD) 1
Effective 2026-03-05 through 2026-03-12
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
Sun
-
Codeshare flight, operated by United Airlines. (UA 2138)
Duration: 1:29, non-stop
Boeing 737-900 (739)
Direct Codeshare Flights:
ANA NH7591
07:41
Saint Louis (STL) 1

09:10
Chicago O'Hare (ORD) 1
Operates only on 2026-03-15
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by United Airlines. (UA 2138)
Duration: 1:29, non-stop
Boeing 737-700 (73G)
Direct Codeshare Flights:
ANA NH7591
07:41
Saint Louis (STL) 1

09:10
Chicago O'Hare (ORD) 1
Operates only on 2026-03-20
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Codeshare flight, operated by United Airlines. (UA 2138)
Duration: 1:29, non-stop
Boeing 737-900 (739)
Direct Codeshare Flights:
ANA NH7591
07:41
Saint Louis (STL) 1

09:10
Chicago O'Hare (ORD) 1
Operates only on 2026-03-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by United Airlines. (UA 2138)
Duration: 1:29, non-stop
Boeing 737-900 (739)
Direct Codeshare Flights:
ANA NH7591
07:45
Saint Louis (STL) 1

09:11
Chicago O'Hare (ORD) 1
Effective 2026-04-02 through 2026-04-09
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by United Airlines. (UA 473)
Duration: 1:26, non-stop
Airbus A319 (319)
Direct Codeshare Flights:
ANA NH7591
07:45
Saint Louis (STL) 1

09:11
Chicago O'Hare (ORD) 1
Effective 2026-04-11 through 2026-04-16
Mon
Tue
-
Wed
Thu
Fri
-
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 473)
Duration: 1:26, non-stop
Airbus A319 (319)
Direct Codeshare Flights:
ANA NH7591
07:45
Saint Louis (STL) 1

09:11
Chicago O'Hare (ORD) 1
Effective 2026-04-19 through 2026-04-26
Mon
Tue
-
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by United Airlines. (UA 473)
Duration: 1:26, non-stop
Airbus A319 (319)
Direct Codeshare Flights:
ANA NH7591
07:45
Saint Louis (STL) 1

09:11
Chicago O'Hare (ORD) 1
Operates only on 2026-04-28
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by United Airlines. (UA 473)
Duration: 1:26, non-stop
Airbus A319 (319)
Direct Codeshare Flights:
ANA NH7591
08:17
Saint Louis (STL) 1

09:50
Chicago O'Hare (ORD) 2
Effective 2026-02-13 through 2026-02-18
Mon
-
Tue
-
Wed
Thu
-
Fri
Sat
-
Sun
-
Codeshare flight, operated by United Airlines. (UA 4608)
Duration: 1:33, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7591
08:17
Saint Louis (STL) 1

09:50
Chicago O'Hare (ORD) 2
Effective 2026-02-21 through 2026-02-26
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
Sun
-
Codeshare flight, operated by United Airlines. (UA 4608)
Duration: 1:33, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7591
08:17
Saint Louis (STL) 1

09:50
Chicago O'Hare (ORD) 2
Effective 2026-03-01 through 2026-03-06
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Codeshare flight, operated by United Airlines. (UA 4608)
Duration: 1:33, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7591
08:17
Saint Louis (STL) 1

09:50
Chicago O'Hare (ORD) 2
Effective 2026-03-17 through 2026-03-21
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by United Airlines. (UA 4608)
Duration: 1:33, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7591
08:26
Saint Louis (STL) 1

09:55
Chicago O'Hare (ORD) 2
Effective 2026-03-29 through 2026-04-04
Mon
Tue
Wed
Thu
-
Fri
-
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4608)
Duration: 1:29, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7591
08:26
Saint Louis (STL) 1

09:55
Chicago O'Hare (ORD) 2
Effective 2026-04-06 through 2026-04-10
Mon
Tue
Wed
Thu
-
Fri
Sat
-
Sun
-
Codeshare flight, operated by United Airlines. (UA 4608)
Duration: 1:29, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7591
08:26
Saint Louis (STL) 1

09:55
Chicago O'Hare (ORD) 2
Effective 2026-04-14 through 2026-04-21
Mon
-
Tue
Wed
-
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by United Airlines. (UA 4608)
Duration: 1:29, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7591
08:26
Saint Louis (STL) 1

09:55
Chicago O'Hare (ORD) 2
Effective 2026-04-25 through 2026-04-29
Mon
Tue
-
Wed
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by United Airlines. (UA 4608)
Duration: 1:29, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7591
09:30
Saint Louis (STL) 1

10:57
Chicago O'Hare (ORD) 2
Effective 2026-04-30 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4601)
Duration: 1:27, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7591
09:30
Saint Louis (STL) 1

10:58
Chicago O'Hare (ORD) 2
Effective 2026-05-21 through 2026-10-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4601)
Duration: 1:28, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7591
11:25
Saint Louis (STL) 1

12:58
Chicago O'Hare (ORD) 2
Effective 2026-03-08 through 2026-03-14
Mon
-
Tue
-
Wed
Thu
-
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4395)
Duration: 1:33, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7591
11:25
Saint Louis (STL) 1

12:58
Chicago O'Hare (ORD) 2
Effective 2026-03-16 through 2026-03-22
Mon
Tue
-
Wed
Thu
Fri
-
Sat
-
Sun
Codeshare flight, operated by United Airlines. (UA 4395)
Duration: 1:33, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7591
11:25
Saint Louis (STL) 1

12:58
Chicago O'Hare (ORD) 2
Effective 2026-03-24 through 2026-03-27
Mon
-
Tue
Wed
-
Thu
Fri
Sat
-
Sun
-
Codeshare flight, operated by United Airlines. (UA 4395)
Duration: 1:33, non-stop
Canadair CRJ 550 (CR5)
  • NH 7591 is a domestic flight departing from the Saint Louis airport (STL) and arriving at Chicago O'Hare airport (ORD).
  • The flight distance is 258 miles, or 415 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 1:20 and 1:35.
All ANA flights
All STL-ORD flights
Return (ORD-STL) flights
Feedback     -     Disclaimer     -     Privacy