All airlines flying from Ontario, Los Angeles (ONT) to Saint Louis (STL).

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FLIGHT SCHEDULE
Non-Direct Flights:
Sat 16:35 Ontario, Los Angeles (ONT) 4 23:25 Saint Louis (STL) 2 Southwest Airlines WN 611 1-stop Boeing 737-700 (73W) 4:50 Effective 2025-06-07 through 2025-08-02
Sat 06:20 Ontario, Los Angeles (ONT) 4 14:05 Saint Louis (STL) 2 Southwest Airlines WN 1184 1-stop Boeing 737-700 (73W) 5:45 Valid until 2025-05-31
Sat 15:25 Ontario, Los Angeles (ONT) 4 22:10 Saint Louis (STL) 2 Southwest Airlines WN 1564 1-stop Boeing 737-700 (Scimitar Winglets) 4:45 Effective 2025-11-08 through 2025-11-15
Sat 15:25 Ontario, Los Angeles (ONT) 4 22:10 Saint Louis (STL) 2 Southwest Airlines WN 1564 1-stop Boeing 737-700 (Scimitar Winglets) 4:45 Effective 2025-12-06 through 2025-12-13
Sat 10:45 Ontario, Los Angeles (ONT) 4 17:45 Saint Louis (STL) 2 Southwest Airlines WN 2410 1-stop Boeing 737 MAX 8 (7M8) 5:00 Valid until 2025-05-31
Mon,Thu,Fri 14:15 Ontario, Los Angeles (ONT) 4 21:30 Saint Louis (STL) 2 Southwest Airlines WN 2471 1-stop Boeing 737-700 (73W) 5:15 Effective 2025-08-07 through 2025-09-29
Sun 08:55 Ontario, Los Angeles (ONT) 4 16:35 Saint Louis (STL) 2 Southwest Airlines WN 3592 1-stop Boeing 737-700 (73W) 5:40 Effective 2025-06-08 through 2025-08-03
Sun 11:45 Ontario, Los Angeles (ONT) 4 19:50 Saint Louis (STL) 2 Southwest Airlines WN 2410 2-stop Boeing 737-700 (73W) 6:05 Valid until 2025-05-18
Sun 11:45 Ontario, Los Angeles (ONT) 4 19:50 Saint Louis (STL) 2 Southwest Airlines WN 2410 2-stop Boeing 737-700 (73W) 6:05 Operates only on 2025-06-01

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Parallax here ONT-STL

A domestic route departing from the Ontario, Los Angeles airport (ONT) and arriving at Saint Louis airport (STL).
The flight distance is 1542 miles, or 2481 km.
The timezone of the departure airport is UTC-8 (plus 1h DST), and the timezone of the arrival airport is UTC-6 (plus 1h DST). Current time at the point of departure is 4:41am, and 6:41am at the point of arrival. There is a 2 hour time difference between the airports.

Return (STL-ONT) flights

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All airlines flying from Ontario, Los Angeles (ONT) to Saint Louis (STL).

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FLIGHT SCHEDULE

Non-Direct Flights:

Southwest Airlines WN611

16:35

Ontario, Los Angeles (ONT) 4

23:25

Saint Louis (STL) 2

Effective 2025-06-07 through 2025-08-02

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 4:50, 1-stop
Boeing 737-700 (73W)

Southwest Airlines WN1184

06:20

Ontario, Los Angeles (ONT) 4

14:05

Saint Louis (STL) 2

Valid until 2025-05-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 5:45, 1-stop
Boeing 737-700 (73W)

Southwest Airlines WN1564

15:25

Ontario, Los Angeles (ONT) 4

22:10

Saint Louis (STL) 2

Effective 2025-11-08 through 2025-11-15

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 4:45, 1-stop
Boeing 737-700 (Scimitar Winglets)

Southwest Airlines WN1564

15:25

Ontario, Los Angeles (ONT) 4

22:10

Saint Louis (STL) 2

Effective 2025-12-06 through 2025-12-13

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 4:45, 1-stop
Boeing 737-700 (Scimitar Winglets)

Southwest Airlines WN2410

10:45

Ontario, Los Angeles (ONT) 4

17:45

Saint Louis (STL) 2

Valid until 2025-05-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 5:00, 1-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN2471

14:15

Ontario, Los Angeles (ONT) 4

21:30

Saint Louis (STL) 2

Effective 2025-08-07 through 2025-09-29

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 5:15, 1-stop
Boeing 737-700 (73W)

Southwest Airlines WN3592

08:55

Ontario, Los Angeles (ONT) 4

16:35

Saint Louis (STL) 2

Effective 2025-06-08 through 2025-08-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 5:40, 1-stop
Boeing 737-700 (73W)

Southwest Airlines WN2410

11:45

Ontario, Los Angeles (ONT) 4

19:50

Saint Louis (STL) 2

Valid until 2025-05-18

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 6:05, 2-stop
Boeing 737-700 (73W)

Southwest Airlines WN2410

11:45

Ontario, Los Angeles (ONT) 4

19:50

Saint Louis (STL) 2

Operates only on 2025-06-01

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 6:05, 2-stop
Boeing 737-700 (73W)

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Parallax here ONT-STL

A domestic route departing from the Ontario, Los Angeles airport (ONT) and arriving at Saint Louis airport (STL).
The flight distance is 1542 miles, or 2481 km.
The timezone of the departure airport is UTC-8 (plus 1h DST), and the timezone of the arrival airport is UTC-6 (plus 1h DST). Current time at the point of departure is 4:41am, and 6:41am at the point of arrival. There is a 2 hour time difference between the airports.

Return (STL-ONT) flights

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