All airlines flying from Saint Louis (STL) to Pittsburgh (PIT).

FLIGHT SCHEDULE
Direct Flights:
Fri,Sun 15:05 Saint Louis (STL) 2 17:40 Pittsburgh (PIT) Southwest Airlines WN 264 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-01-02 through 2026-01-04
Tue,Wed 10:25 Saint Louis (STL) 2 13:00 Pittsburgh (PIT) Southwest Airlines WN 383 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-06-09 through 2026-07-29
Thu,Fri,Sun 08:10 Saint Louis (STL) 2 10:45 Pittsburgh (PIT) Southwest Airlines WN 1056 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-01-11 through 2026-01-16
Mon,Sun 08:10 Saint Louis (STL) 2 10:45 Pittsburgh (PIT) Southwest Airlines WN 1056 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-01-19 through 2026-01-25
Thu,Fri,Sun 08:10 Saint Louis (STL) 2 10:45 Pittsburgh (PIT) Southwest Airlines WN 1056 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-02-01 through 2026-02-06
Mon,Sun 08:10 Saint Louis (STL) 2 10:45 Pittsburgh (PIT) Southwest Airlines WN 1056 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-02-09 through 2026-02-15
Mon,Tue,Thu 08:10 Saint Louis (STL) 2 10:45 Pittsburgh (PIT) Southwest Airlines WN 1056 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-02-17 through 2026-02-23
Mon 08:10 Saint Louis (STL) 2 10:45 Pittsburgh (PIT) Southwest Airlines WN 1056 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Operates only on 2026-03-02
Mon-Fri 18:15 Saint Louis (STL) 2 20:50 Pittsburgh (PIT) Southwest Airlines WN 1056 Non-stop Boeing 737-800 (73H) 1:35 Effective 2026-01-06 through 2026-01-14
Tue-Fri,Sun 18:15 Saint Louis (STL) 2 20:50 Pittsburgh (PIT) Southwest Airlines WN 1056 Non-stop Boeing 737-800 (73H) 1:35 Effective 2026-01-18 through 2026-01-23
Mon-Fri 18:15 Saint Louis (STL) 2 20:50 Pittsburgh (PIT) Southwest Airlines WN 1056 Non-stop Boeing 737-800 (73H) 1:35 Effective 2026-01-26 through 2026-02-04
Tue,Wed,Sun 18:15 Saint Louis (STL) 2 20:50 Pittsburgh (PIT) Southwest Airlines WN 1056 Non-stop Boeing 737-800 (73H) 1:35 Effective 2026-02-08 through 2026-02-11
Tue,Wed 18:15 Saint Louis (STL) 2 20:50 Pittsburgh (PIT) Southwest Airlines WN 1056 Non-stop Boeing 737-800 (73H) 1:35 Effective 2026-02-18 through 2026-03-04
Mon,Thu,Fri,Sun 10:15 Saint Louis (STL) 2 12:50 Pittsburgh (PIT) Southwest Airlines WN 2074 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-03-05 through 2026-04-06
Tue,Wed 10:15 Saint Louis (STL) 2 12:50 Pittsburgh (PIT) Southwest Airlines WN 2074 Non-stop Boeing 737-800 (73H) 1:35 Effective 2026-03-10 through 2026-04-01
Tue,Wed 18:45 Saint Louis (STL) 2 21:20 Pittsburgh (PIT) Southwest Airlines WN 2338 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-03-10 through 2026-04-01
Mon,Thu-Sat 19:40 Saint Louis (STL) 2 22:15 Pittsburgh (PIT) Southwest Airlines WN 2338 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-03-05 through 2026-04-06
Sun 19:50 Saint Louis (STL) 2 22:25 Pittsburgh (PIT) Southwest Airlines WN 2338 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-03-08 through 2026-04-05
Sun 10:30 Saint Louis (STL) 2 13:05 Pittsburgh (PIT) Southwest Airlines WN 2525 Non-stop Boeing 737-800 (73H) 1:35 Effective 2026-06-07 through 2026-08-02
Tue,Wed 18:45 Saint Louis (STL) 2 21:20 Pittsburgh (PIT) Southwest Airlines WN 2620 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-04-07 through 2026-06-03
Sat 18:55 Saint Louis (STL) 2 21:30 Pittsburgh (PIT) Southwest Airlines WN 2620 Non-stop Boeing 737 MAX 8 (7M8) 1:35 Effective 2026-04-11 through 2026-05-30
Mon,Thu,Fri 19:40 Saint Louis (STL) 2 22:15 Pittsburgh (PIT) Southwest Airlines WN 2620 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-04-09 through 2026-06-01
Sun 20:20 Saint Louis (STL) 2 23:00 Pittsburgh (PIT) Southwest Airlines WN 2620 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Effective 2026-04-12 through 2026-05-17
Sun 20:20 Saint Louis (STL) 2 23:00 Pittsburgh (PIT) Southwest Airlines WN 2620 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Operates only on 2026-05-31
Sat 14:40 Saint Louis (STL) 2 17:15 Pittsburgh (PIT) Southwest Airlines WN 3292 Non-stop Boeing 737-800 (73H) 1:35 Valid until 2026-01-03
Mon 08:00 Saint Louis (STL) 2 10:40 Pittsburgh (PIT) Southwest Airlines WN 3551 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Operates only on 2026-01-05
Wed,Thu 18:15 Saint Louis (STL) 2 20:50 Pittsburgh (PIT) Southwest Airlines WN 3551 Non-stop Boeing 737-700 (73W) 1:35 Valid until 2026-01-01
Tue,Wed,Sun 10:15 Saint Louis (STL) 2 12:55 Pittsburgh (PIT) Southwest Airlines WN 3773 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Effective 2026-04-07 through 2026-05-20
Mon,Thu,Fri 10:15 Saint Louis (STL) 2 12:55 Pittsburgh (PIT) Southwest Airlines WN 3773 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Effective 2026-04-09 through 2026-06-01
Tue,Wed,Sun 10:15 Saint Louis (STL) 2 12:55 Pittsburgh (PIT) Southwest Airlines WN 3773 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Effective 2026-05-26 through 2026-06-03
Sun 11:00 Saint Louis (STL) 2 13:35 Pittsburgh (PIT) Southwest Airlines WN 3773 Non-stop Boeing 737 MAX 8 (7M8) 1:35 Operates only on 2026-05-24
Mon,Thu,Fri 07:55 Saint Louis (STL) 2 10:30 Pittsburgh (PIT) Southwest Airlines WN 3819 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 07:55 Saint Louis (STL) 2 10:30 Pittsburgh (PIT) Southwest Airlines WN 3819 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-02-20 through 2026-03-01
Sat 15:55 Saint Louis (STL) 2 18:30 Pittsburgh (PIT) Southwest Airlines WN 3819 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-02-14 through 2026-02-28
Sat,Sun 10:15 Saint Louis (STL) 2 12:55 Pittsburgh (PIT) Southwest Airlines WN 3879 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Effective 2026-08-08 through 2026-09-27
Mon,Thu,Fri 10:20 Saint Louis (STL) 2 13:00 Pittsburgh (PIT) Southwest Airlines WN 3879 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Effective 2026-08-06 through 2026-09-28
Tue,Wed 10:25 Saint Louis (STL) 2 13:05 Pittsburgh (PIT) Southwest Airlines WN 3879 Non-stop Boeing 737-800 (73H) 1:40 Effective 2026-08-04 through 2026-09-30
Mon,Thu,Fri 09:55 Saint Louis (STL) 2 12:30 Pittsburgh (PIT) Southwest Airlines WN 3971 Non-stop Boeing 737 MAX 8 (7M8) 1:35 Effective 2026-06-04 through 2026-08-03
Sat 10:35 Saint Louis (STL) 2 13:10 Pittsburgh (PIT) Southwest Airlines WN 3971 Non-stop Boeing 737-800 (73H) 1:35 Effective 2026-06-06 through 2026-08-01
Tue,Wed 19:10 Saint Louis (STL) 2 21:45 Pittsburgh (PIT) Southwest Airlines WN 3972 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-06-09 through 2026-07-29
Mon,Thu,Fri 19:55 Saint Louis (STL) 2 22:30 Pittsburgh (PIT) Southwest Airlines WN 3972 Non-stop Boeing 737-800 (73H) 1:35 Effective 2026-06-04 through 2026-08-03
Sun 19:55 Saint Louis (STL) 2 22:30 Pittsburgh (PIT) Southwest Airlines WN 3972 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-06-07 through 2026-08-02
Tue,Wed 18:40 Saint Louis (STL) 2 21:15 Pittsburgh (PIT) Southwest Airlines WN 4165 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-08-04 through 2026-09-30
Sun 18:55 Saint Louis (STL) 2 21:30 Pittsburgh (PIT) Southwest Airlines WN 4165 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-08-09 through 2026-09-27
Mon,Thu,Fri 19:30 Saint Louis (STL) 2 22:10 Pittsburgh (PIT) Southwest Airlines WN 4165 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Effective 2026-08-06 through 2026-09-28
Non-Direct Flights:
Mon,Thu,Fri 10:00 Saint Louis (STL) 2 14:50 Pittsburgh (PIT) Southwest Airlines WN 236 1-stop Boeing 737-700 (Scimitar Winglets) 3:50 Effective 2026-06-04 through 2026-08-03
Sun 10:25 Saint Louis (STL) 2 15:15 Pittsburgh (PIT) Southwest Airlines WN 1941 1-stop Boeing 737-700 (Scimitar Winglets) 3:50 Effective 2026-03-08 through 2026-04-05
Sun 10:15 Saint Louis (STL) 2 15:05 Pittsburgh (PIT) Southwest Airlines WN 4427 1-stop Boeing 737-700 (Scimitar Winglets) 3:50 Effective 2026-04-12 through 2026-05-17
Sun 10:15 Saint Louis (STL) 2 15:05 Pittsburgh (PIT) Southwest Airlines WN 4427 1-stop Boeing 737-700 (Scimitar Winglets) 3:50 Operates only on 2026-05-31
Sun 11:00 Saint Louis (STL) 2 15:50 Pittsburgh (PIT) Southwest Airlines WN 4427 1-stop Boeing 737-700 (Scimitar Winglets) 3:50 Operates only on 2026-05-24

A domestic route departing from the Saint Louis airport (STL) and arriving at Pittsburgh airport (PIT).
The flight distance is 552 miles, or 888 km.
The timezone of the departure airport is UTC-6 , and the timezone of the arrival airport is UTC-5 . Current time at the point of departure is (loading...), and (loading...) at the point of arrival. There is a (loading...) hour time difference between the airports.
For direct flights, the flight time varies between 1:35 and 1:40.

Return (PIT-STL) flights

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All airlines flying from Saint Louis (STL) to Pittsburgh (PIT).

FLIGHT SCHEDULE

Direct Flights:

Southwest Airlines WN264

15:05

Saint Louis (STL) 2

17:40

Pittsburgh (PIT)

Effective 2026-01-02 through 2026-01-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN383

10:25

Saint Louis (STL) 2

13:00

Pittsburgh (PIT)

Effective 2026-06-09 through 2026-07-29

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1056

08:10

Saint Louis (STL) 2

10:45

Pittsburgh (PIT)

Effective 2026-01-11 through 2026-01-16

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1056

08:10

Saint Louis (STL) 2

10:45

Pittsburgh (PIT)

Effective 2026-01-19 through 2026-01-25

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1056

08:10

Saint Louis (STL) 2

10:45

Pittsburgh (PIT)

Effective 2026-02-01 through 2026-02-06

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1056

08:10

Saint Louis (STL) 2

10:45

Pittsburgh (PIT)

Effective 2026-02-09 through 2026-02-15

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1056

08:10

Saint Louis (STL) 2

10:45

Pittsburgh (PIT)

Effective 2026-02-17 through 2026-02-23

Mon

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1056

08:10

Saint Louis (STL) 2

10:45

Pittsburgh (PIT)

Operates only on 2026-03-02

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1056

18:15

Saint Louis (STL) 2

20:50

Pittsburgh (PIT)

Effective 2026-01-06 through 2026-01-14

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 1:35, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN1056

18:15

Saint Louis (STL) 2

20:50

Pittsburgh (PIT)

Effective 2026-01-18 through 2026-01-23

Mon
-

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 1:35, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN1056

18:15

Saint Louis (STL) 2

20:50

Pittsburgh (PIT)

Effective 2026-01-26 through 2026-02-04

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 1:35, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN1056

18:15

Saint Louis (STL) 2

20:50

Pittsburgh (PIT)

Effective 2026-02-08 through 2026-02-11

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:35, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN1056

18:15

Saint Louis (STL) 2

20:50

Pittsburgh (PIT)

Effective 2026-02-18 through 2026-03-04

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:35, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2074

10:15

Saint Louis (STL) 2

12:50

Pittsburgh (PIT)

Effective 2026-03-05 through 2026-04-06

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN2074

10:15

Saint Louis (STL) 2

12:50

Pittsburgh (PIT)

Effective 2026-03-10 through 2026-04-01

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:35, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2338

18:45

Saint Louis (STL) 2

21:20

Pittsburgh (PIT)

Effective 2026-03-10 through 2026-04-01

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN2338

19:40

Saint Louis (STL) 2

22:15

Pittsburgh (PIT)

Effective 2026-03-05 through 2026-04-06

Mon

Tue
-

Wed
-

Thu

Fri

Sat

Sun
-

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN2338

19:50

Saint Louis (STL) 2

22:25

Pittsburgh (PIT)

Effective 2026-03-08 through 2026-04-05

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN2525

10:30

Saint Louis (STL) 2

13:05

Pittsburgh (PIT)

Effective 2026-06-07 through 2026-08-02

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:35, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2620

18:45

Saint Louis (STL) 2

21:20

Pittsburgh (PIT)

Effective 2026-04-07 through 2026-06-03

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN2620

18:55

Saint Louis (STL) 2

21:30

Pittsburgh (PIT)

Effective 2026-04-11 through 2026-05-30

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 1:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2620

19:40

Saint Louis (STL) 2

22:15

Pittsburgh (PIT)

Effective 2026-04-09 through 2026-06-01

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN2620

20:20

Saint Louis (STL) 2

23:00

Pittsburgh (PIT)

Effective 2026-04-12 through 2026-05-17

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:40, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN2620

20:20

Saint Louis (STL) 2

23:00

Pittsburgh (PIT)

Operates only on 2026-05-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:40, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3292

14:40

Saint Louis (STL) 2

17:15

Pittsburgh (PIT)

Valid until 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 1:35, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3551

08:00

Saint Louis (STL) 2

10:40

Pittsburgh (PIT)

Operates only on 2026-01-05

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:40, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3551

18:15

Saint Louis (STL) 2

20:50

Pittsburgh (PIT)

Valid until 2026-01-01

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

Duration: 1:35, non-stop
Boeing 737-700 (73W)

Direct Flights:

Southwest Airlines WN3773

10:15

Saint Louis (STL) 2

12:55

Pittsburgh (PIT)

Effective 2026-04-07 through 2026-05-20

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:40, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3773

10:15

Saint Louis (STL) 2

12:55

Pittsburgh (PIT)

Effective 2026-04-09 through 2026-06-01

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 1:40, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3773

10:15

Saint Louis (STL) 2

12:55

Pittsburgh (PIT)

Effective 2026-05-26 through 2026-06-03

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:40, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3773

11:00

Saint Louis (STL) 2

13:35

Pittsburgh (PIT)

Operates only on 2026-05-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3819

07:55

Saint Louis (STL) 2

10:30

Pittsburgh (PIT)

Effective 2026-02-12 through 2026-02-16

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3819

07:55

Saint Louis (STL) 2

10:30

Pittsburgh (PIT)

Effective 2026-02-20 through 2026-03-01

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3819

15:55

Saint Louis (STL) 2

18:30

Pittsburgh (PIT)

Effective 2026-02-14 through 2026-02-28

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3879

10:15

Saint Louis (STL) 2

12:55

Pittsburgh (PIT)

Effective 2026-08-08 through 2026-09-27

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun

Duration: 1:40, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3879

10:20

Saint Louis (STL) 2

13:00

Pittsburgh (PIT)

Effective 2026-08-06 through 2026-09-28

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 1:40, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3879

10:25

Saint Louis (STL) 2

13:05

Pittsburgh (PIT)

Effective 2026-08-04 through 2026-09-30

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:40, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3971

09:55

Saint Louis (STL) 2

12:30

Pittsburgh (PIT)

Effective 2026-06-04 through 2026-08-03

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 1:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3971

10:35

Saint Louis (STL) 2

13:10

Pittsburgh (PIT)

Effective 2026-06-06 through 2026-08-01

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 1:35, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3972

19:10

Saint Louis (STL) 2

21:45

Pittsburgh (PIT)

Effective 2026-06-09 through 2026-07-29

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3972

19:55

Saint Louis (STL) 2

22:30

Pittsburgh (PIT)

Effective 2026-06-04 through 2026-08-03

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 1:35, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3972

19:55

Saint Louis (STL) 2

22:30

Pittsburgh (PIT)

Effective 2026-06-07 through 2026-08-02

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4165

18:40

Saint Louis (STL) 2

21:15

Pittsburgh (PIT)

Effective 2026-08-04 through 2026-09-30

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4165

18:55

Saint Louis (STL) 2

21:30

Pittsburgh (PIT)

Effective 2026-08-09 through 2026-09-27

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4165

19:30

Saint Louis (STL) 2

22:10

Pittsburgh (PIT)

Effective 2026-08-06 through 2026-09-28

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 1:40, non-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN236

10:00

Saint Louis (STL) 2

14:50

Pittsburgh (PIT)

Effective 2026-06-04 through 2026-08-03

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:50, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN1941

10:25

Saint Louis (STL) 2

15:15

Pittsburgh (PIT)

Effective 2026-03-08 through 2026-04-05

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:50, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN4427

10:15

Saint Louis (STL) 2

15:05

Pittsburgh (PIT)

Effective 2026-04-12 through 2026-05-17

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:50, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN4427

10:15

Saint Louis (STL) 2

15:05

Pittsburgh (PIT)

Operates only on 2026-05-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:50, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN4427

11:00

Saint Louis (STL) 2

15:50

Pittsburgh (PIT)

Operates only on 2026-05-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:50, 1-stop
Boeing 737-700 (Scimitar Winglets)

A domestic route departing from the Saint Louis airport (STL) and arriving at Pittsburgh airport (PIT).
The flight distance is 552 miles, or 888 km.
The timezone of the departure airport is UTC-6 , and the timezone of the arrival airport is UTC-5 . Current time at the point of departure is (loading...), and (loading...) at the point of arrival. There is a (loading...) hour time difference between the airports.
For direct flights, the flight time varies between 1:35 and 1:40.

Return (PIT-STL) flights

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