Austrian flights from Chicago O'Hare (ORD) to Saint Louis (STL).

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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Mon,Wed,Fri 15:45 Chicago O'Hare (ORD) 2 17:14 Saint Louis (STL) 1
Austrian OS 7735 Non-stop Canadair CRJ 550 (CR5) 1:29 Effective 2025-11-03 through 2025-12-05
Codeshare flight, operated by United Airlines.(UA 4518)
Mon,Wed,Fri-Sun 15:45 Chicago O'Hare (ORD) 2 17:14 Saint Louis (STL) 1
Austrian OS 7735 Non-stop Canadair CRJ 550 (CR5) 1:29 Effective 2025-12-06 through 2026-01-02
Codeshare flight, operated by United Airlines.(UA 4518)
Mon,Wed,Fri,Sun 15:45 Chicago O'Hare (ORD) 2 17:14 Saint Louis (STL) 1
Austrian OS 7735 Non-stop Canadair CRJ 550 (CR5) 1:29 Effective 2026-01-05 through 2026-01-16
Codeshare flight, operated by United Airlines.(UA 4518)
Mon,Wed,Fri,Sun 15:45 Chicago O'Hare (ORD) 2 17:14 Saint Louis (STL) 1
Austrian OS 7735 Non-stop Canadair CRJ 550 (CR5) 1:29 Effective 2026-01-19 through 2026-01-30
Codeshare flight, operated by United Airlines.(UA 4518)
Mon,Wed,Fri,Sun 15:45 Chicago O'Hare (ORD) 2 17:14 Saint Louis (STL) 1
Austrian OS 7735 Non-stop Canadair CRJ 550 (CR5) 1:29 Effective 2026-02-02 through 2026-02-13
Codeshare flight, operated by United Airlines.(UA 4518)
Mon,Wed,Fri,Sun 15:45 Chicago O'Hare (ORD) 2 17:14 Saint Louis (STL) 1
Austrian OS 7735 Non-stop Canadair CRJ 550 (CR5) 1:29 Effective from 2026-02-16
Codeshare flight, operated by United Airlines.(UA 4518)
Mon,Tue,Thu-Sun 15:50 Chicago O'Hare (ORD) 2 17:23 Saint Louis (STL) 1
Austrian OS 7735 Non-stop Canadair CRJ 550 (CR5) 1:33 Valid until 2025-05-20
Codeshare flight, operated by United Airlines.(UA 4518)
Mon,Tue,Thu-Sun 16:40 Chicago O'Hare (ORD) 2 18:00 Saint Louis (STL) 1
Austrian OS 7735 Non-stop Canadair CRJ 550 (CR5) 1:20 Effective 2025-05-22 through 2025-06-24
Codeshare flight, operated by United Airlines.(UA 4518)
Mon,Tue,Thu-Sun 16:46 Chicago O'Hare (ORD) 2 18:13 Saint Louis (STL) 1
Austrian OS 7735 Non-stop Canadair CRJ 550 (CR5) 1:27 Effective 2025-08-19 through 2025-10-25
Codeshare flight, operated by United Airlines.(UA 4518)
Mon,Tue,Thu-Sun 16:47 Chicago O'Hare (ORD) 2 18:07 Saint Louis (STL) 1
Austrian OS 7735 Non-stop Canadair CRJ 550 (CR5) 1:20 Effective 2025-06-26 through 2025-08-18
Codeshare flight, operated by United Airlines.(UA 4518)
Mon,Wed,Fri 18:00 Chicago O'Hare (ORD) 2 19:25 Saint Louis (STL) 1
Austrian OS 7735 Non-stop Canadair CRJ 550 (CR5) 1:25 Effective 2025-10-27 through 2025-10-31
Codeshare flight, operated by United Airlines.(UA 4416)
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Austrian flights from Chicago O'Hare (ORD) to Saint Louis (STL).
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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Austrian OS7735
15:45
Chicago O'Hare (ORD) 2

17:14
Saint Louis (STL) 1
Effective 2025-11-03 through 2025-12-05
Mon
Tue
-
Wed
Thu
-
Fri
Sat
-
Sun
-
Codeshare flight, operated by United Airlines. (UA 4518)
Duration: 1:29, non-stop
Canadair CRJ 550 (CR5)
Austrian OS7735
15:45
Chicago O'Hare (ORD) 2

17:14
Saint Louis (STL) 1
Effective 2025-12-06 through 2026-01-02
Mon
Tue
-
Wed
Thu
-
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4518)
Duration: 1:29, non-stop
Canadair CRJ 550 (CR5)
Austrian OS7735
15:45
Chicago O'Hare (ORD) 2

17:14
Saint Louis (STL) 1
Effective 2026-01-05 through 2026-01-16
Mon
Tue
-
Wed
Thu
-
Fri
Sat
-
Sun
Codeshare flight, operated by United Airlines. (UA 4518)
Duration: 1:29, non-stop
Canadair CRJ 550 (CR5)
Austrian OS7735
15:45
Chicago O'Hare (ORD) 2

17:14
Saint Louis (STL) 1
Effective 2026-01-19 through 2026-01-30
Mon
Tue
-
Wed
Thu
-
Fri
Sat
-
Sun
Codeshare flight, operated by United Airlines. (UA 4518)
Duration: 1:29, non-stop
Canadair CRJ 550 (CR5)
Austrian OS7735
15:45
Chicago O'Hare (ORD) 2

17:14
Saint Louis (STL) 1
Effective 2026-02-02 through 2026-02-13
Mon
Tue
-
Wed
Thu
-
Fri
Sat
-
Sun
Codeshare flight, operated by United Airlines. (UA 4518)
Duration: 1:29, non-stop
Canadair CRJ 550 (CR5)
Austrian OS7735
15:45
Chicago O'Hare (ORD) 2

17:14
Saint Louis (STL) 1
Effective from 2026-02-16
Mon
Tue
-
Wed
Thu
-
Fri
Sat
-
Sun
Codeshare flight, operated by United Airlines. (UA 4518)
Duration: 1:29, non-stop
Canadair CRJ 550 (CR5)
Austrian OS7735
15:50
Chicago O'Hare (ORD) 2

17:23
Saint Louis (STL) 1
Valid until 2025-05-20
Mon
Tue
Wed
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4518)
Duration: 1:33, non-stop
Canadair CRJ 550 (CR5)
Austrian OS7735
16:40
Chicago O'Hare (ORD) 2

18:00
Saint Louis (STL) 1
Effective 2025-05-22 through 2025-06-24
Mon
Tue
Wed
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4518)
Duration: 1:20, non-stop
Canadair CRJ 550 (CR5)
Austrian OS7735
16:46
Chicago O'Hare (ORD) 2

18:13
Saint Louis (STL) 1
Effective 2025-08-19 through 2025-10-25
Mon
Tue
Wed
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4518)
Duration: 1:27, non-stop
Canadair CRJ 550 (CR5)
Austrian OS7735
16:47
Chicago O'Hare (ORD) 2

18:07
Saint Louis (STL) 1
Effective 2025-06-26 through 2025-08-18
Mon
Tue
Wed
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4518)
Duration: 1:20, non-stop
Canadair CRJ 550 (CR5)
Austrian OS7735
18:00
Chicago O'Hare (ORD) 2

19:25
Saint Louis (STL) 1
Effective 2025-10-27 through 2025-10-31
Mon
Tue
-
Wed
Thu
-
Fri
Sat
-
Sun
-
Codeshare flight, operated by United Airlines. (UA 4416)
Duration: 1:25, non-stop
Canadair CRJ 550 (CR5)
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  • A domestic route departing from the Chicago O'Hare airport (ORD) and arriving at Saint Louis airport (STL).
  • 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 1:33.
All ORD-STL flights
All Austrian flights
Return (STL-ORD) flights
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