ANA flight NH 7451: Saint Louis - Chicago O'Hare

Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Wed 07:40 Saint Louis (STL) 1 09:09 Chicago O'Hare (ORD) 1
NH 7451 Non-stop Boeing 737-900 (739) 1:29 Operates only on 2026-03-11
Codeshare flight, operated by United Airlines.(UA 2138)
Tue 07:40 Saint Louis (STL) 1 09:09 Chicago O'Hare (ORD) 1
NH 7451 Non-stop Boeing 737-900 (739) 1:29 Operates only on 2026-03-24
Codeshare flight, operated by United Airlines.(UA 2138)
Sun 07:41 Saint Louis (STL) 1 09:10 Chicago O'Hare (ORD) 1
NH 7451 Non-stop Boeing 737-700 (73G) 1:29 Operates only on 2026-03-08
Codeshare flight, operated by United Airlines.(UA 2138)
Sat 07:41 Saint Louis (STL) 1 09:10 Chicago O'Hare (ORD) 1
NH 7451 Non-stop Boeing 737-900 (739) 1:29 Operates only on 2026-03-14
Codeshare flight, operated by United Airlines.(UA 2138)
Sun 07:41 Saint Louis (STL) 1 09:10 Chicago O'Hare (ORD) 1
NH 7451 Non-stop Boeing 737-700 (73G) 1:29 Operates only on 2026-03-22
Codeshare flight, operated by United Airlines.(UA 2138)
Thu,Fri 07:41 Saint Louis (STL) 1 09:10 Chicago O'Hare (ORD) 1
NH 7451 Non-stop Boeing 737-900 (739) 1:29 Effective 2026-03-26 through 2026-03-27
Codeshare flight, operated by United Airlines.(UA 2138)
Mon,Wed-Fri 08:17 Saint Louis (STL) 1 09:50 Chicago O'Hare (ORD) 2
NH 7451 Non-stop Canadair CRJ 550 (CR5) 1:33 Effective 2026-03-13 through 2026-03-19
Codeshare flight, operated by United Airlines.(UA 4608)
Mon-Wed,Fri,Sat 09:55 Saint Louis (STL) 1 11:30 Chicago O'Hare (ORD) 2
NH 7451 Non-stop Canadair CRJ 550 (CR5) 1:35 Valid until 2026-01-03
Codeshare flight, operated by United Airlines.(UA 4597)
Mon,Thu,Sun 11:05 Saint Louis (STL) 1 12:40 Chicago O'Hare (ORD) 2
NH 7451 Non-stop Canadair CRJ 550 (CR5) 1:35 Valid until 2026-01-05
Codeshare flight, operated by United Airlines.(UA 4405)
Daily 11:20 Saint Louis (STL) 1 12:55 Chicago O'Hare (ORD) 2
NH 7451 Non-stop Canadair CRJ 550 (CR5) 1:35 Effective 2026-01-06 through 2026-02-03
Codeshare flight, operated by United Airlines.(UA 4395)
Wed 11:20 Saint Louis (STL) 1 12:57 Chicago O'Hare (ORD) 2
NH 7451 Non-stop Embraer EMB 175 (E7W) 1:37 Operates only on 2026-02-04
Codeshare flight, operated by United Airlines.(UA 3486)
Daily 11:20 Saint Louis (STL) 1 12:55 Chicago O'Hare (ORD) 2
NH 7451 Non-stop Canadair CRJ 550 (CR5) 1:35 Effective 2026-02-05 through 2026-02-11
Codeshare flight, operated by United Airlines.(UA 4395)
Daily 11:25 Saint Louis (STL) 1 12:58 Chicago O'Hare (ORD) 2
NH 7451 Non-stop Canadair CRJ 550 (CR5) 1:33 Effective 2026-02-12 through 2026-03-07
Codeshare flight, operated by United Airlines.(UA 4395)
Mon,Tue,Thu,Sun 11:25 Saint Louis (STL) 1 12:58 Chicago O'Hare (ORD) 2
NH 7451 Non-stop Canadair CRJ 550 (CR5) 1:33 Effective 2026-03-09 through 2026-03-15
Codeshare flight, operated by United Airlines.(UA 4395)
Mon,Tue,Fri,Sat 11:25 Saint Louis (STL) 1 12:58 Chicago O'Hare (ORD) 2
NH 7451 Non-stop Canadair CRJ 550 (CR5) 1:33 Effective 2026-03-17 through 2026-03-23
Codeshare flight, operated by United Airlines.(UA 4395)
Wed,Sat 11:25 Saint Louis (STL) 1 12:58 Chicago O'Hare (ORD) 2
NH 7451 Non-stop Canadair CRJ 550 (CR5) 1:33 Effective 2026-03-25 through 2026-03-28
Codeshare flight, operated by United Airlines.(UA 4395)
Mon,Wed,Fri-Sun 13:14 Saint Louis (STL) 1 14:43 Chicago O'Hare (ORD) 2
NH 7451 Non-stop Canadair CRJ 550 (CR5) 1:29 Effective 2026-03-29 through 2026-04-04
Codeshare flight, operated by United Airlines.(UA 4592)
Mon-Wed,Sat,Sun 13:14 Saint Louis (STL) 1 14:43 Chicago O'Hare (ORD) 2
NH 7451 Non-stop Canadair CRJ 550 (CR5) 1:29 Effective 2026-04-08 through 2026-04-14
Codeshare flight, operated by United Airlines.(UA 4592)
Mon,Tue,Fri 13:14 Saint Louis (STL) 1 14:43 Chicago O'Hare (ORD) 2
NH 7451 Non-stop Canadair CRJ 550 (CR5) 1:29 Effective 2026-04-17 through 2026-04-24
Codeshare flight, operated by United Airlines.(UA 4592)
Mon,Sat 13:14 Saint Louis (STL) 1 14:43 Chicago O'Hare (ORD) 2
NH 7451 Non-stop Canadair CRJ 550 (CR5) 1:29 Effective 2026-04-25 through 2026-04-27
Codeshare flight, operated by United Airlines.(UA 4592)
Daily 15:15 Saint Louis (STL) 1 16:43 Chicago O'Hare (ORD) 2
NH 7451 Non-stop Canadair CRJ 550 (CR5) 1:28 Effective 2026-04-30 through 2026-05-20
Codeshare flight, operated by United Airlines.(UA 4487)
Daily 15:15 Saint Louis (STL) 1 16:43 Chicago O'Hare (ORD) 1
NH 7451 Non-stop Airbus A319 (319) 1:28 Effective from 2026-05-21
Codeshare flight, operated by United Airlines.(UA 1761)
Mon,Tue,Thu,Sun 15:23 Saint Louis (STL) 1 16:53 Chicago O'Hare (ORD) 2
NH 7451 Non-stop Embraer EMB 175 (E7W) 1:30 Effective 2026-03-31 through 2026-04-09
Codeshare flight, operated by United Airlines.(UA 3528)
Wed-Fri 15:23 Saint Louis (STL) 1 16:53 Chicago O'Hare (ORD) 2
NH 7451 Non-stop Embraer EMB 175 (E7W) 1:30 Effective 2026-04-10 through 2026-04-16
Codeshare flight, operated by United Airlines.(UA 3528)
Wed,Thu,Sat,Sun 15:23 Saint Louis (STL) 1 16:53 Chicago O'Hare (ORD) 2
NH 7451 Non-stop Embraer EMB 175 (E7W) 1:30 Effective 2026-04-18 through 2026-04-23
Codeshare flight, operated by United Airlines.(UA 3528)
Tue,Wed,Sun 15:23 Saint Louis (STL) 1 16:53 Chicago O'Hare (ORD) 2
NH 7451 Non-stop Embraer EMB 175 (E7W) 1:30 Effective 2026-04-26 through 2026-04-29
Codeshare flight, operated by United Airlines.(UA 3528)


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ANA flight NH 7451:
Saint Louis - Chicago O'Hare
Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
ANA NH7451
07:40
Saint Louis (STL) 1

09:09
Chicago O'Hare (ORD) 1
Operates only on 2026-03-11
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 NH7451
07:40
Saint Louis (STL) 1

09:09
Chicago O'Hare (ORD) 1
Operates only on 2026-03-24
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 NH7451
07:41
Saint Louis (STL) 1

09:10
Chicago O'Hare (ORD) 1
Operates only on 2026-03-08
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 NH7451
07:41
Saint Louis (STL) 1

09:10
Chicago O'Hare (ORD) 1
Operates only on 2026-03-14
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 NH7451
07:41
Saint Louis (STL) 1

09:10
Chicago O'Hare (ORD) 1
Operates only on 2026-03-22
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 NH7451
07:41
Saint Louis (STL) 1

09:10
Chicago O'Hare (ORD) 1
Effective 2026-03-26 through 2026-03-27
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 NH7451
08:17
Saint Louis (STL) 1

09:50
Chicago O'Hare (ORD) 2
Effective 2026-03-13 through 2026-03-19
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 NH7451
09:55
Saint Louis (STL) 1

11:30
Chicago O'Hare (ORD) 2
Valid until 2026-01-03
Mon
Tue
Wed
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by United Airlines. (UA 4597)
Duration: 1:35, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7451
11:05
Saint Louis (STL) 1

12:40
Chicago O'Hare (ORD) 2
Valid until 2026-01-05
Mon
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
Codeshare flight, operated by United Airlines. (UA 4405)
Duration: 1:35, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7451
11:20
Saint Louis (STL) 1

12:55
Chicago O'Hare (ORD) 2
Effective 2026-01-06 through 2026-02-03
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4395)
Duration: 1:35, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7451
11:20
Saint Louis (STL) 1

12:57
Chicago O'Hare (ORD) 2
Operates only on 2026-02-04
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by United Airlines. (UA 3486)
Duration: 1:37, non-stop
Embraer EMB 175 (E7W)
Direct Codeshare Flights:
ANA NH7451
11:20
Saint Louis (STL) 1

12:55
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 4395)
Duration: 1:35, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7451
11:25
Saint Louis (STL) 1

12:58
Chicago O'Hare (ORD) 2
Effective 2026-02-12 through 2026-03-07
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 NH7451
11:25
Saint Louis (STL) 1

12:58
Chicago O'Hare (ORD) 2
Effective 2026-03-09 through 2026-03-15
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 NH7451
11:25
Saint Louis (STL) 1

12:58
Chicago O'Hare (ORD) 2
Effective 2026-03-17 through 2026-03-23
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 NH7451
11:25
Saint Louis (STL) 1

12:58
Chicago O'Hare (ORD) 2
Effective 2026-03-25 through 2026-03-28
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 NH7451
13:14
Saint Louis (STL) 1

14:43
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 4592)
Duration: 1:29, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7451
13:14
Saint Louis (STL) 1

14:43
Chicago O'Hare (ORD) 2
Effective 2026-04-08 through 2026-04-14
Mon
Tue
Wed
Thu
-
Fri
-
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4592)
Duration: 1:29, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7451
13:14
Saint Louis (STL) 1

14:43
Chicago O'Hare (ORD) 2
Effective 2026-04-17 through 2026-04-24
Mon
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Codeshare flight, operated by United Airlines. (UA 4592)
Duration: 1:29, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7451
13:14
Saint Louis (STL) 1

14:43
Chicago O'Hare (ORD) 2
Effective 2026-04-25 through 2026-04-27
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by United Airlines. (UA 4592)
Duration: 1:29, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7451
15:15
Saint Louis (STL) 1

16:43
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 4487)
Duration: 1:28, non-stop
Canadair CRJ 550 (CR5)
Direct Codeshare Flights:
ANA NH7451
15:15
Saint Louis (STL) 1

16:43
Chicago O'Hare (ORD) 1
Effective from 2026-05-21
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 1761)
Duration: 1:28, non-stop
Airbus A319 (319)
Direct Codeshare Flights:
ANA NH7451
15:23
Saint Louis (STL) 1

16:53
Chicago O'Hare (ORD) 2
Effective 2026-03-31 through 2026-04-09
Mon
Tue
Wed
-
Thu
Fri
-
Sat
-
Sun
Codeshare flight, operated by United Airlines. (UA 3528)
Duration: 1:30, non-stop
Embraer EMB 175 (E7W)
Direct Codeshare Flights:
ANA NH7451
15:23
Saint Louis (STL) 1

16:53
Chicago O'Hare (ORD) 2
Effective 2026-04-10 through 2026-04-16
Mon
-
Tue
-
Wed
Thu
Fri
Sat
-
Sun
-
Codeshare flight, operated by United Airlines. (UA 3528)
Duration: 1:30, non-stop
Embraer EMB 175 (E7W)
Direct Codeshare Flights:
ANA NH7451
15:23
Saint Louis (STL) 1

16:53
Chicago O'Hare (ORD) 2
Effective 2026-04-18 through 2026-04-23
Mon
-
Tue
-
Wed
Thu
Fri
-
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 3528)
Duration: 1:30, non-stop
Embraer EMB 175 (E7W)
Direct Codeshare Flights:
ANA NH7451
15:23
Saint Louis (STL) 1

16:53
Chicago O'Hare (ORD) 2
Effective 2026-04-26 through 2026-04-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by United Airlines. (UA 3528)
Duration: 1:30, non-stop
Embraer EMB 175 (E7W)
  • NH 7451 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 1:28 and 1:37.
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