Southwest Airlines flight WN 4637: Multiple routes

FLIGHT SCHEDULE
Direct Flights:
Mon,Thu,Fri 05:10 Chicago Midway (MDW) 07:25 Los Angeles (LAX) 1 WN 4637 Non-stop Boeing 737 MAX 8 (7M8) 4:15 Effective 2026-06-04 through 2026-08-03
Sun 05:25 Chicago Midway (MDW) 07:40 Los Angeles (LAX) 1 WN 4637 Non-stop Boeing 737 MAX 8 (7M8) 4:15 Effective 2026-06-07 through 2026-08-02
Mon,Thu,Fri,Sun 05:35 Tucson (TUS) 06:30 Phoenix Sky Harbor (PHX) 4 WN 4637 Non-stop Boeing 737-700 (Scimitar Winglets) 0:55 Effective 2026-04-09 through 2026-05-22
Mon,Thu,Fri,Sun 05:35 Tucson (TUS) 06:30 Phoenix Sky Harbor (PHX) 4 WN 4637 Non-stop Boeing 737-700 (Scimitar Winglets) 0:55 Effective 2026-05-25 through 2026-06-01
Sat 05:50 Tucson (TUS) 06:45 Phoenix Sky Harbor (PHX) 4 WN 4637 Non-stop Boeing 737-700 (Scimitar Winglets) 0:55 Effective 2026-04-11 through 2026-05-30
Sat 05:55 West Palm Beach (PBI) 07:45 Saint Louis (STL) 2 WN 4637 Non-stop Boeing 737-800 (73H) 2:50 Effective 2026-03-07 through 2026-04-04
Mon,Thu,Fri 06:45 Denver (DEN) 10:20 Nashville (BNA) WN 4637 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 06:45 Denver (DEN) 10:20 Nashville (BNA) WN 4637 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-02-20 through 2026-03-01
Thu,Fri,Sun 07:05 Denver (DEN) 10:45 Nashville (BNA) WN 4637 Non-stop Boeing 737-700 (Scimitar Winglets) 2:40 Effective 2026-01-11 through 2026-01-16
Mon,Sun 07:05 Denver (DEN) 10:45 Nashville (BNA) WN 4637 Non-stop Boeing 737-700 (Scimitar Winglets) 2:40 Effective 2026-01-19 through 2026-01-25
Thu,Fri,Sun 07:05 Denver (DEN) 10:45 Nashville (BNA) WN 4637 Non-stop Boeing 737-700 (Scimitar Winglets) 2:40 Effective 2026-02-01 through 2026-02-06
Mon,Sun 07:05 Denver (DEN) 10:45 Nashville (BNA) WN 4637 Non-stop Boeing 737-700 (Scimitar Winglets) 2:40 Effective 2026-02-09 through 2026-02-15
Mon,Tue,Thu 07:05 Denver (DEN) 10:45 Nashville (BNA) WN 4637 Non-stop Boeing 737-700 (Scimitar Winglets) 2:40 Effective 2026-02-17 through 2026-02-23
Mon 07:05 Denver (DEN) 10:45 Nashville (BNA) WN 4637 Non-stop Boeing 737-700 (Scimitar Winglets) 2:40 Operates only on 2026-03-02
Mon,Thu,Fri 07:05 Phoenix Sky Harbor (PHX) 4 08:35 Burbank (BUR) WN 4637 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Effective 2026-04-09 through 2026-06-01
Tue,Wed 07:15 Phoenix Sky Harbor (PHX) 4 08:40 Burbank (BUR) WN 4637 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Effective 2026-04-07 through 2026-06-03
Sat 07:40 Denver (DEN) 11:15 Nashville (BNA) WN 4637 Non-stop Boeing 737-700 (Scimitar Winglets) 2:35 Effective 2026-02-14 through 2026-02-28
Sun 07:45 Tucson (TUS) 08:45 Phoenix Sky Harbor (PHX) 4 WN 4637 Non-stop Boeing 737-700 (Scimitar Winglets) 1:00 Operates only on 2026-05-24
Thu,Fri,Sun 11:20 Nashville (BNA) 13:00 Chicago Midway (MDW) WN 4637 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Effective 2026-01-11 through 2026-01-16
Mon,Sun 11:20 Nashville (BNA) 13:00 Chicago Midway (MDW) WN 4637 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Effective 2026-01-19 through 2026-01-25
Thu,Fri,Sun 11:20 Nashville (BNA) 13:00 Chicago Midway (MDW) WN 4637 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Effective 2026-02-01 through 2026-02-06
Mon,Sun 11:20 Nashville (BNA) 13:00 Chicago Midway (MDW) WN 4637 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Effective 2026-02-09 through 2026-02-15
Mon,Tue,Thu 11:20 Nashville (BNA) 13:00 Chicago Midway (MDW) WN 4637 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Effective 2026-02-17 through 2026-02-23
Mon 11:20 Nashville (BNA) 13:00 Chicago Midway (MDW) WN 4637 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Operates only on 2026-03-02
Sat 12:05 Nashville (BNA) 13:40 Chicago Midway (MDW) WN 4637 Non-stop Boeing 737-800 (73H) 1:35 Effective 2026-01-10 through 2026-01-31
Sat 12:05 Nashville (BNA) 13:40 Chicago Midway (MDW) WN 4637 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Operates only on 2026-02-07
Mon,Thu,Fri 13:55 Sacramento (SMF) B 17:15 Denver (DEN) WN 4637 Non-stop Boeing 737-700 (Scimitar Winglets) 2:20 Effective 2026-08-06 through 2026-09-28
Sat 15:20 Albany (ALB) 16:40 Baltimore (BWI) WN 4637 Non-stop Boeing 737-800 (73H) 1:20 Valid until 2026-01-03
Sun 17:10 Sacramento (SMF) B 20:25 Denver (DEN) WN 4637 Non-stop Boeing 737-700 (Scimitar Winglets) 2:15 Effective 2026-08-09 through 2026-09-27
Non-Direct Flights:
Mon,Thu,Fri 05:35 Tucson (TUS) 08:35 Burbank (BUR) WN 4637 1-stop Boeing 737-700 (Scimitar Winglets) 3:00 Effective 2026-04-09 through 2026-06-01
Thu,Fri,Sun 07:05 Denver (DEN) 13:00 Chicago Midway (MDW) WN 4637 1-stop Boeing 737-700 (Scimitar Winglets) 4:55 Effective 2026-01-11 through 2026-01-16
Mon,Sun 07:05 Denver (DEN) 13:00 Chicago Midway (MDW) WN 4637 1-stop Boeing 737-700 (Scimitar Winglets) 4:55 Effective 2026-01-19 through 2026-01-25
Thu,Fri,Sun 07:05 Denver (DEN) 13:00 Chicago Midway (MDW) WN 4637 1-stop Boeing 737-700 (Scimitar Winglets) 4:55 Effective 2026-02-01 through 2026-02-06
Mon,Sun 07:05 Denver (DEN) 13:00 Chicago Midway (MDW) WN 4637 1-stop Boeing 737-700 (Scimitar Winglets) 4:55 Effective 2026-02-09 through 2026-02-15
Mon,Tue,Thu 07:05 Denver (DEN) 13:00 Chicago Midway (MDW) WN 4637 1-stop Boeing 737-700 (Scimitar Winglets) 4:55 Effective 2026-02-17 through 2026-02-23
Mon 07:05 Denver (DEN) 13:00 Chicago Midway (MDW) WN 4637 1-stop Boeing 737-700 (Scimitar Winglets) 4:55 Operates only on 2026-03-02

This flight number is listed as serving the following routes:

Albany (ALB) - Baltimore (BWI)
Chicago Midway (MDW) - Los Angeles (LAX)
Denver (DEN) - Chicago Midway (MDW)
Denver (DEN) - Nashville (BNA)
Nashville (BNA) - Chicago Midway (MDW)
Phoenix Sky Harbor (PHX) - Burbank (BUR)
Sacramento (SMF) - Denver (DEN)
Tucson (TUS) - Burbank (BUR)
Tucson (TUS) - Phoenix Sky Harbor (PHX)
West Palm Beach (PBI) - Saint Louis (STL)

All Southwest Airlines flights

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Southwest Airlines flight WN 4637: Multiple routes

FLIGHT SCHEDULE

Direct Flights:

Southwest Airlines WN4637

05:10

Chicago Midway (MDW)

07:25

Los Angeles (LAX) 1

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 4:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4637

05:25

Chicago Midway (MDW)

07:40

Los Angeles (LAX) 1

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 4:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4637

05:35

Tucson (TUS)

06:30

Phoenix Sky Harbor (PHX) 4

Effective 2026-04-09 through 2026-05-22

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 0:55, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4637

05:35

Tucson (TUS)

06:30

Phoenix Sky Harbor (PHX) 4

Effective 2026-05-25 through 2026-06-01

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 0:55, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4637

05:50

Tucson (TUS)

06:45

Phoenix Sky Harbor (PHX) 4

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 0:55, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4637

05:55

West Palm Beach (PBI)

07:45

Saint Louis (STL) 2

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Direct Flights:

Southwest Airlines WN4637

06:45

Denver (DEN)

10:20

Nashville (BNA)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN4637

06:45

Denver (DEN)

10:20

Nashville (BNA)

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN4637

07:05

Denver (DEN)

10:45

Nashville (BNA)

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 2:40, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4637

07:05

Denver (DEN)

10:45

Nashville (BNA)

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

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:40, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4637

07:05

Denver (DEN)

10:45

Nashville (BNA)

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 2:40, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4637

07:05

Denver (DEN)

10:45

Nashville (BNA)

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

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:40, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4637

07:05

Denver (DEN)

10:45

Nashville (BNA)

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

Mon

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 2:40, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4637

07:05

Denver (DEN)

10:45

Nashville (BNA)

Operates only on 2026-03-02

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:40, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4637

07:05

Phoenix Sky Harbor (PHX) 4

08:35

Burbank (BUR)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN4637

07:15

Phoenix Sky Harbor (PHX) 4

08:40

Burbank (BUR)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4637

07:40

Denver (DEN)

11:15

Nashville (BNA)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4637

07:45

Tucson (TUS)

08:45

Phoenix Sky Harbor (PHX) 4

Operates only on 2026-05-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:00, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4637

11:20

Nashville (BNA)

13:00

Chicago Midway (MDW)

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN4637

11:20

Nashville (BNA)

13:00

Chicago Midway (MDW)

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

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN4637

11:20

Nashville (BNA)

13:00

Chicago Midway (MDW)

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN4637

11:20

Nashville (BNA)

13:00

Chicago Midway (MDW)

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

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN4637

11:20

Nashville (BNA)

13:00

Chicago Midway (MDW)

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

Mon

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN4637

11:20

Nashville (BNA)

13:00

Chicago Midway (MDW)

Operates only on 2026-03-02

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN4637

12:05

Nashville (BNA)

13:40

Chicago Midway (MDW)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Direct Flights:

Southwest Airlines WN4637

12:05

Nashville (BNA)

13:40

Chicago Midway (MDW)

Operates only on 2026-02-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Direct Flights:

Southwest Airlines WN4637

13:55

Sacramento (SMF) B

17:15

Denver (DEN)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 2:20, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4637

15:20

Albany (ALB)

16:40

Baltimore (BWI)

Valid until 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 1:20, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN4637

17:10

Sacramento (SMF) B

20:25

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:15, non-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN4637

05:35

Tucson (TUS)

08:35

Burbank (BUR)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:00, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN4637

07:05

Denver (DEN)

13:00

Chicago Midway (MDW)

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 4:55, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN4637

07:05

Denver (DEN)

13:00

Chicago Midway (MDW)

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

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 4:55, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN4637

07:05

Denver (DEN)

13:00

Chicago Midway (MDW)

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 4:55, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN4637

07:05

Denver (DEN)

13:00

Chicago Midway (MDW)

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

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 4:55, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN4637

07:05

Denver (DEN)

13:00

Chicago Midway (MDW)

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

Mon

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 4:55, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN4637

07:05

Denver (DEN)

13:00

Chicago Midway (MDW)

Operates only on 2026-03-02

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 4:55, 1-stop
Boeing 737-700 (Scimitar Winglets)

This flight number is listed as serving the following routes:

Albany (ALB) - Baltimore (BWI)
Chicago Midway (MDW) - Los Angeles (LAX)
Denver (DEN) - Chicago Midway (MDW)
Denver (DEN) - Nashville (BNA)
Nashville (BNA) - Chicago Midway (MDW)
Phoenix Sky Harbor (PHX) - Burbank (BUR)
Sacramento (SMF) - Denver (DEN)
Tucson (TUS) - Burbank (BUR)
Tucson (TUS) - Phoenix Sky Harbor (PHX)
West Palm Beach (PBI) - Saint Louis (STL)

All Southwest Airlines flights

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