Southwest Airlines flight WN 3815: Multiple routes

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FLIGHT SCHEDULE
Direct Flights:
Sun 05:00 Saint Louis (STL) 2 07:30 Phoenix Sky Harbor (PHX) 4 WN 3815 Non-stop Boeing 737 MAX 8 (7M8) 3:30 Operates only on 2026-02-15
Sun 05:00 Sacramento (SMF) B 06:55 Phoenix Sky Harbor (PHX) 4 WN 3815 Non-stop Boeing 737 MAX 8 (7M8) 1:55 Effective 2026-06-07 through 2026-08-02
Sat 05:05 Sacramento (SMF) B 07:00 Phoenix Sky Harbor (PHX) 4 WN 3815 Non-stop Boeing 737 MAX 8 (7M8) 1:55 Effective 2026-06-06 through 2026-08-01
Mon,Thu,Fri 05:10 Sacramento (SMF) B 07:05 Phoenix Sky Harbor (PHX) 4 WN 3815 Non-stop Boeing 737-800 (73H) 1:55 Effective 2026-06-04 through 2026-08-03
Tue,Wed 05:15 Sacramento (SMF) B 07:05 Phoenix Sky Harbor (PHX) 4 WN 3815 Non-stop Boeing 737 MAX 8 (7M8) 1:50 Effective 2026-06-09 through 2026-07-29
Mon,Thu,Fri 05:20 Saint Louis (STL) 2 08:05 Phoenix Sky Harbor (PHX) 4 WN 3815 Non-stop Boeing 737 MAX 8 (7M8) 3:45 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 05:20 Saint Louis (STL) 2 08:05 Phoenix Sky Harbor (PHX) 4 WN 3815 Non-stop Boeing 737 MAX 8 (7M8) 3:45 Effective 2026-02-20 through 2026-03-01
Thu,Fri,Sun 05:25 Saint Louis (STL) 2 08:10 Phoenix Sky Harbor (PHX) 4 WN 3815 Non-stop Boeing 737 MAX 8 (7M8) 3:45 Effective 2026-01-11 through 2026-01-16
Mon,Sun 05:25 Saint Louis (STL) 2 08:10 Phoenix Sky Harbor (PHX) 4 WN 3815 Non-stop Boeing 737 MAX 8 (7M8) 3:45 Effective 2026-01-19 through 2026-01-25
Thu,Fri,Sun 05:25 Saint Louis (STL) 2 08:10 Phoenix Sky Harbor (PHX) 4 WN 3815 Non-stop Boeing 737 MAX 8 (7M8) 3:45 Effective 2026-02-01 through 2026-02-06
Mon 05:25 Saint Louis (STL) 2 08:10 Phoenix Sky Harbor (PHX) 4 WN 3815 Non-stop Boeing 737 MAX 8 (7M8) 3:45 Operates only on 2026-02-09
Tue,Thu 05:25 Saint Louis (STL) 2 08:10 Phoenix Sky Harbor (PHX) 4 WN 3815 Non-stop Boeing 737-800 (73H) 3:45 Effective 2026-02-17 through 2026-02-19
Mon 05:25 Saint Louis (STL) 2 08:10 Phoenix Sky Harbor (PHX) 4 WN 3815 Non-stop Boeing 737 MAX 8 (7M8) 3:45 Operates only on 2026-02-23
Mon 05:25 Saint Louis (STL) 2 08:10 Phoenix Sky Harbor (PHX) 4 WN 3815 Non-stop Boeing 737-800 (73H) 3:45 Operates only on 2026-03-02
Sat 06:40 Saint Louis (STL) 2 09:20 Phoenix Sky Harbor (PHX) 4 WN 3815 Non-stop Boeing 737-700 (Scimitar Winglets) 3:40 Operates only on 2026-02-28
Sun 07:30 Chicago Midway (MDW) 09:00 Nashville (BNA) WN 3815 Non-stop Boeing 737 MAX 8 (7M8) 1:30 Effective 2026-03-08 through 2026-04-05
Tue,Wed 07:45 Chicago Midway (MDW) 09:15 Nashville (BNA) WN 3815 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Effective 2026-03-10 through 2026-04-01
Mon,Thu,Fri 07:55 Chicago Midway (MDW) 09:30 Nashville (BNA) WN 3815 Non-stop Boeing 737 MAX 8 (7M8) 1:35 Effective 2026-03-05 through 2026-04-06
Mon,Thu,Fri 08:10 Phoenix Sky Harbor (PHX) 4 12:50 Kansas City (MCI) WN 3815 Non-stop Boeing 737-800 (73H) 2:40 Effective 2026-04-09 through 2026-06-01
Sun 08:30 Phoenix Sky Harbor (PHX) 4 13:05 Kansas City (MCI) WN 3815 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-04-12 through 2026-05-17
Sun 08:30 Phoenix Sky Harbor (PHX) 4 13:05 Kansas City (MCI) WN 3815 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Operates only on 2026-05-31
Tue,Wed 08:50 Phoenix Sky Harbor (PHX) 4 13:20 Kansas City (MCI) WN 3815 Non-stop Boeing 737 MAX 8 (7M8) 2:30 Effective 2026-04-07 through 2026-06-03
Sun 09:30 Phoenix Sky Harbor (PHX) 4 14:05 Kansas City (MCI) WN 3815 Non-stop Boeing 737-800 (73H) 2:35 Operates only on 2026-05-24
Tue,Wed,Sat 09:50 Nashville (BNA) 12:00 Greenville/Spartanburg (GSP) WN 3815 Non-stop Boeing 737-700 (Scimitar Winglets) 1:10 Effective 2026-03-07 through 2026-04-04
Sat 10:25 Saint Louis (STL) 2 13:00 Phoenix Sky Harbor (PHX) 4 WN 3815 Non-stop Boeing 737 MAX 8 (7M8) 3:35 Effective 2026-01-10 through 2026-01-31
Sat 10:25 Saint Louis (STL) 2 13:00 Phoenix Sky Harbor (PHX) 4 WN 3815 Non-stop Boeing 737-700 (Scimitar Winglets) 3:35 Operates only on 2026-02-07
Sat 12:25 Phoenix Sky Harbor (PHX) 4 16:50 Kansas City (MCI) WN 3815 Non-stop Boeing 737 MAX 8 (7M8) 2:25 Effective 2026-04-11 through 2026-05-30
Thu 13:35 Tampa (TPA) 15:25 Milwaukee (MKE) WN 3815 Non-stop Boeing 737-700 (73W) 2:50 Valid until 2026-01-01
Sun 15:05 Denver (DEN) 16:40 Salt Lake City (SLC) WN 3815 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-08-09 through 2026-09-27
Tue,Wed 16:05 Denver (DEN) 17:40 Salt Lake City (SLC) WN 3815 Non-stop Boeing 737-800 (73H) 1:35 Effective 2026-08-04 through 2026-09-30
Mon 17:35 Tampa (TPA) 19:25 Milwaukee (MKE) WN 3815 Non-stop Boeing 737-800 (73H) 2:50 Operates only on 2026-01-05
Mon,Tue,Fri,Sun 17:40 Tampa (TPA) 19:30 Milwaukee (MKE) WN 3815 Non-stop Boeing 737 MAX 8 (7M8) 2:50 Valid until 2026-01-04
Mon,Thu,Fri 19:45 Denver (DEN) 21:20 Salt Lake City (SLC) WN 3815 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-08-06 through 2026-09-28
Sat 20:30 Tampa (TPA) 22:20 Milwaukee (MKE) WN 3815 Non-stop Boeing 737-800 (73H) 2:50 Valid until 2026-01-03
Non-Direct Flights:
Tue,Wed 07:45 Chicago Midway (MDW) 12:00 Greenville/Spartanburg (GSP) WN 3815 1-stop Boeing 737-700 (Scimitar Winglets) 3:15 Effective 2026-03-10 through 2026-04-01

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This flight number is listed as serving the following routes:

Chicago Midway (MDW) - Greenville/Spartanburg (GSP)
Chicago Midway (MDW) - Nashville (BNA)
Denver (DEN) - Salt Lake City (SLC)
Nashville (BNA) - Greenville/Spartanburg (GSP)
Phoenix Sky Harbor (PHX) - Kansas City (MCI)
Sacramento (SMF) - Phoenix Sky Harbor (PHX)
Saint Louis (STL) - Phoenix Sky Harbor (PHX)
Tampa (TPA) - Milwaukee (MKE)

All Southwest Airlines flights

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Southwest Airlines flight WN 3815: Multiple routes

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FLIGHT SCHEDULE

Direct Flights:

Southwest Airlines WN3815

05:00

Saint Louis (STL) 2

07:30

Phoenix Sky Harbor (PHX) 4

Operates only on 2026-02-15

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:30, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3815

05:00

Sacramento (SMF) B

06:55

Phoenix Sky Harbor (PHX) 4

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:55, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3815

05:05

Sacramento (SMF) B

07:00

Phoenix Sky Harbor (PHX) 4

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 1:55, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3815

05:10

Sacramento (SMF) B

07:05

Phoenix Sky Harbor (PHX) 4

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 1:55, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3815

05:15

Sacramento (SMF) B

07:05

Phoenix Sky Harbor (PHX) 4

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:50, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3815

05:20

Saint Louis (STL) 2

08:05

Phoenix Sky Harbor (PHX) 4

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:45, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3815

05:20

Saint Louis (STL) 2

08:05

Phoenix Sky Harbor (PHX) 4

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:45, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3815

05:25

Saint Louis (STL) 2

08:10

Phoenix Sky Harbor (PHX) 4

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:45, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3815

05:25

Saint Louis (STL) 2

08:10

Phoenix Sky Harbor (PHX) 4

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

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:45, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3815

05:25

Saint Louis (STL) 2

08:10

Phoenix Sky Harbor (PHX) 4

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:45, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3815

05:25

Saint Louis (STL) 2

08:10

Phoenix Sky Harbor (PHX) 4

Operates only on 2026-02-09

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:45, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3815

05:25

Saint Louis (STL) 2

08:10

Phoenix Sky Harbor (PHX) 4

Effective 2026-02-17 through 2026-02-19

Mon
-

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 3:45, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3815

05:25

Saint Louis (STL) 2

08:10

Phoenix Sky Harbor (PHX) 4

Operates only on 2026-02-23

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:45, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3815

05:25

Saint Louis (STL) 2

08:10

Phoenix Sky Harbor (PHX) 4

Operates only on 2026-03-02

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:45, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3815

06:40

Saint Louis (STL) 2

09:20

Phoenix Sky Harbor (PHX) 4

Operates only on 2026-02-28

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:40, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3815

07:30

Chicago Midway (MDW)

09:00

Nashville (BNA)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:30, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3815

07:45

Chicago Midway (MDW)

09:15

Nashville (BNA)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:30, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3815

07:55

Chicago Midway (MDW)

09:30

Nashville (BNA)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN3815

08:10

Phoenix Sky Harbor (PHX) 4

12:50

Kansas City (MCI)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 2:40, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3815

08:30

Phoenix Sky Harbor (PHX) 4

13:05

Kansas City (MCI)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3815

08:30

Phoenix Sky Harbor (PHX) 4

13:05

Kansas City (MCI)

Operates only on 2026-05-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3815

08:50

Phoenix Sky Harbor (PHX) 4

13:20

Kansas City (MCI)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:30, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3815

09:30

Phoenix Sky Harbor (PHX) 4

14:05

Kansas City (MCI)

Operates only on 2026-05-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:35, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3815

09:50

Nashville (BNA)

12:00

Greenville/Spartanburg (GSP)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat

Sun
-

Duration: 1:10, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3815

10:25

Saint Louis (STL) 2

13:00

Phoenix Sky Harbor (PHX) 4

Effective 2026-01-10 through 2026-01-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3815

10:25

Saint Louis (STL) 2

13:00

Phoenix Sky Harbor (PHX) 4

Operates only on 2026-02-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3815

12:25

Phoenix Sky Harbor (PHX) 4

16:50

Kansas City (MCI)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:25, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3815

13:35

Tampa (TPA)

15:25

Milwaukee (MKE)

Valid until 2026-01-01

Mon
-

Tue
-

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 2:50, non-stop
Boeing 737-700 (73W)

Direct Flights:

Southwest Airlines WN3815

15:05

Denver (DEN)

16:40

Salt Lake City (SLC)

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 WN3815

16:05

Denver (DEN)

17:40

Salt Lake City (SLC)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN3815

17:35

Tampa (TPA)

19:25

Milwaukee (MKE)

Operates only on 2026-01-05

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:50, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3815

17:40

Tampa (TPA)

19:30

Milwaukee (MKE)

Valid until 2026-01-04

Mon

Tue

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 2:50, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3815

19:45

Denver (DEN)

21:20

Salt Lake City (SLC)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN3815

20:30

Tampa (TPA)

22:20

Milwaukee (MKE)

Valid until 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:50, non-stop
Boeing 737-800 (73H)

Non-Direct Flights:

Southwest Airlines WN3815

07:45

Chicago Midway (MDW)

12:00

Greenville/Spartanburg (GSP)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:15, 1-stop
Boeing 737-700 (Scimitar Winglets)

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Parallax here

This flight number is listed as serving the following routes:

Chicago Midway (MDW) - Greenville/Spartanburg (GSP)
Chicago Midway (MDW) - Nashville (BNA)
Denver (DEN) - Salt Lake City (SLC)
Nashville (BNA) - Greenville/Spartanburg (GSP)
Phoenix Sky Harbor (PHX) - Kansas City (MCI)
Sacramento (SMF) - Phoenix Sky Harbor (PHX)
Saint Louis (STL) - Phoenix Sky Harbor (PHX)
Tampa (TPA) - Milwaukee (MKE)

All Southwest Airlines flights

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