Southwest Airlines flight WN 4451: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Mon,Thu,Fri 05:50 Tulsa (TUL) 07:40 Phoenix Sky Harbor (PHX) 4
WN 4451 Non-stop Boeing 737-700 (Scimitar Winglets) 2:50 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 05:50 Tulsa (TUL) 07:40 Phoenix Sky Harbor (PHX) 4
WN 4451 Non-stop Boeing 737-700 (Scimitar Winglets) 2:50 Effective 2026-02-20 through 2026-03-01
Thu,Fri,Sun 06:10 Tulsa (TUL) 08:00 Phoenix Sky Harbor (PHX) 4
WN 4451 Non-stop Boeing 737-700 (Scimitar Winglets) 2:50 Effective 2026-01-11 through 2026-01-16
Mon,Sun 06:10 Tulsa (TUL) 08:00 Phoenix Sky Harbor (PHX) 4
WN 4451 Non-stop Boeing 737-700 (Scimitar Winglets) 2:50 Effective 2026-01-19 through 2026-01-25
Thu,Fri,Sun 06:10 Tulsa (TUL) 08:00 Phoenix Sky Harbor (PHX) 4
WN 4451 Non-stop Boeing 737-700 (Scimitar Winglets) 2:50 Effective 2026-02-01 through 2026-02-06
Mon,Sun 06:10 Tulsa (TUL) 08:00 Phoenix Sky Harbor (PHX) 4
WN 4451 Non-stop Boeing 737-700 (Scimitar Winglets) 2:50 Effective 2026-02-09 through 2026-02-15
Mon,Tue,Thu 06:10 Tulsa (TUL) 08:00 Phoenix Sky Harbor (PHX) 4
WN 4451 Non-stop Boeing 737-700 (Scimitar Winglets) 2:50 Effective 2026-02-17 through 2026-02-23
Mon 06:10 Tulsa (TUL) 08:00 Phoenix Sky Harbor (PHX) 4
WN 4451 Non-stop Boeing 737-700 (Scimitar Winglets) 2:50 Operates only on 2026-03-02
Tue,Wed 07:05 San Diego (SAN) 1 12:35 Saint Louis (STL) 2
WN 4451 Non-stop Boeing 737-700 (Scimitar Winglets) 3:30 Effective 2026-04-07 through 2026-06-03
Sat 07:35 San Diego (SAN) 1 13:05 Saint Louis (STL) 2
WN 4451 Non-stop Boeing 737-700 (Scimitar Winglets) 3:30 Effective 2026-04-11 through 2026-05-30
Sun 12:20 Chicago Midway (MDW) 14:10 Spokane (GEG)
WN 4451 Non-stop Boeing 737 MAX 8 (7M8) 3:50 Effective 2026-08-09 through 2026-09-27
Sun 13:05 Saint Louis (STL) 2 16:05 Ronald Reagan Washington (DCA) 1
WN 4451 Non-stop Boeing 737 MAX 8 (7M8) 2:00 Effective 2026-04-12 through 2026-05-17
Sun 13:05 Saint Louis (STL) 2 16:05 Ronald Reagan Washington (DCA) 1
WN 4451 Non-stop Boeing 737-800 (73H) 2:00 Operates only on 2026-05-24
Sun 13:05 Saint Louis (STL) 2 16:05 Ronald Reagan Washington (DCA) 1
WN 4451 Non-stop Boeing 737 MAX 8 (7M8) 2:00 Operates only on 2026-05-31
Tue,Wed 13:10 Saint Louis (STL) 2 16:10 Ronald Reagan Washington (DCA) 1
WN 4451 Non-stop Boeing 737-700 (Scimitar Winglets) 2:00 Effective 2026-04-07 through 2026-06-03
Mon,Thu,Fri 13:20 Saint Louis (STL) 2 16:20 Ronald Reagan Washington (DCA) 1
WN 4451 Non-stop Boeing 737-700 (Scimitar Winglets) 2:00 Effective 2026-04-09 through 2026-06-01
Sat 16:20 New York LaGuardia (LGA) B 18:15 Saint Louis (STL) 2
WN 4451 Non-stop Boeing 737 MAX 8 (7M8) 2:55 Valid until 2026-01-03
Thu 16:40 Baltimore (BWI) 19:10 Orlando (MCO)
WN 4451 Non-stop Boeing 737-700 (73W) 2:30 Valid until 2026-01-01
Sat 18:55 Saint Louis (STL) 2 20:55 San Diego (SAN) 1
WN 4451 Non-stop Boeing 737 MAX 8 (7M8) 4:00 Valid until 2026-01-03
Mon,Thu,Fri 20:50 Chicago Midway (MDW) 22:40 Spokane (GEG)
WN 4451 Non-stop Boeing 737 MAX 8 (7M8) 3:50 Effective 2026-08-06 through 2026-09-28
Thu,Fri 21:05 San Jose (SJC) B 23:55 Phoenix Sky Harbor (PHX) 4
WN 4451 Non-stop Boeing 737-800 (73H) 1:50 Effective 2026-03-05 through 2026-03-06
Mon,Thu,Fri 21:10 San Jose (SJC) B 23:00 Phoenix Sky Harbor (PHX) 4
WN 4451 Non-stop Boeing 737-800 (73H) 1:50 Effective 2026-03-09 through 2026-04-06
Sun 21:15 San Jose (SJC) B 23:05 Phoenix Sky Harbor (PHX) 4
WN 4451 Non-stop Boeing 737-800 (73H) 1:50 Effective 2026-03-08 through 2026-04-05
Tue,Wed 21:15 San Jose (SJC) B 23:05 Phoenix Sky Harbor (PHX) 4
WN 4451 Non-stop Boeing 737 MAX 8 (7M8) 1:50 Effective 2026-03-10 through 2026-04-01
Tue,Wed 21:25 Houston Hobby (HOU) 22:20 San Antonio (SAT) A
WN 4451 Non-stop Boeing 737-700 (Scimitar Winglets) 0:55 Effective 2026-06-09 through 2026-07-29
Sat 21:30 Houston Hobby (HOU) 22:25 San Antonio (SAT) A
WN 4451 Non-stop Boeing 737-700 (Scimitar Winglets) 0:55 Effective 2026-06-06 through 2026-08-01
Mon,Thu,Fri 22:35 Houston Hobby (HOU) 23:30 San Antonio (SAT) A
WN 4451 Non-stop Boeing 737-700 (Scimitar Winglets) 0:55 Effective 2026-06-04 through 2026-08-03
Sun 22:55 Houston Hobby (HOU) 23:50 San Antonio (SAT) A
WN 4451 Non-stop Boeing 737-700 (Scimitar Winglets) 0:55 Effective 2026-06-07 through 2026-08-02
Non-Direct Flights:
Tue,Wed 07:05 San Diego (SAN) 1 16:10 Ronald Reagan Washington (DCA) 1
WN 4451 1-stop Boeing 737-700 (Scimitar Winglets) 6:05 Effective 2026-04-07 through 2026-06-03
Sat 16:20 New York LaGuardia (LGA) B 20:55 San Diego (SAN) 1
WN 4451 1-stop Boeing 737 MAX 8 (7M8) 7:35 Valid until 2026-01-03
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This flight number is listed as serving the following routes:


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Southwest Airlines flight WN 4451: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN4451
05:50
Tulsa (TUL)

07:40
Phoenix Sky Harbor (PHX) 4
Effective 2026-02-12 through 2026-02-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 2:50, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4451
05:50
Tulsa (TUL)

07:40
Phoenix Sky Harbor (PHX) 4
Effective 2026-02-20 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 2:50, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4451
06:10
Tulsa (TUL)

08:00
Phoenix Sky Harbor (PHX) 4
Effective 2026-01-11 through 2026-01-16
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 2:50, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4451
06:10
Tulsa (TUL)

08:00
Phoenix Sky Harbor (PHX) 4
Effective 2026-01-19 through 2026-01-25
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:50, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4451
06:10
Tulsa (TUL)

08:00
Phoenix Sky Harbor (PHX) 4
Effective 2026-02-01 through 2026-02-06
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 2:50, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4451
06:10
Tulsa (TUL)

08:00
Phoenix Sky Harbor (PHX) 4
Effective 2026-02-09 through 2026-02-15
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:50, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4451
06:10
Tulsa (TUL)

08:00
Phoenix Sky Harbor (PHX) 4
Effective 2026-02-17 through 2026-02-23
Mon
Tue
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 2:50, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4451
06:10
Tulsa (TUL)

08:00
Phoenix Sky Harbor (PHX) 4
Operates only on 2026-03-02
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:50, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4451
07:05
San Diego (SAN) 1

12:35
Saint Louis (STL) 2
Effective 2026-04-07 through 2026-06-03
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:30, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4451
07:35
San Diego (SAN) 1

13:05
Saint Louis (STL) 2
Effective 2026-04-11 through 2026-05-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:30, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4451
12:20
Chicago Midway (MDW)

14:10
Spokane (GEG)
Effective 2026-08-09 through 2026-09-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:50, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4451
13:05
Saint Louis (STL) 2

16:05
Ronald Reagan Washington (DCA) 1
Effective 2026-04-12 through 2026-05-17
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:00, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4451
13:05
Saint Louis (STL) 2

16:05
Ronald Reagan Washington (DCA) 1
Operates only on 2026-05-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:00, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN4451
13:05
Saint Louis (STL) 2

16:05
Ronald Reagan Washington (DCA) 1
Operates only on 2026-05-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:00, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4451
13:10
Saint Louis (STL) 2

16:10
Ronald Reagan Washington (DCA) 1
Effective 2026-04-07 through 2026-06-03
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:00, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4451
13:20
Saint Louis (STL) 2

16:20
Ronald Reagan Washington (DCA) 1
Effective 2026-04-09 through 2026-06-01
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 2:00, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4451
16:20
New York LaGuardia (LGA) B

18:15
Saint Louis (STL) 2
Valid until 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:55, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4451
16:40
Baltimore (BWI)

19:10
Orlando (MCO)
Valid until 2026-01-01
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 2:30, non-stop
Boeing 737-700 (73W)
Direct Flights:
Southwest Airlines WN4451
18:55
Saint Louis (STL) 2

20:55
San Diego (SAN) 1
Valid until 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 4:00, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4451
20:50
Chicago Midway (MDW)

22:40
Spokane (GEG)
Effective 2026-08-06 through 2026-09-28
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 3:50, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4451
21:05
San Jose (SJC) B

23:55
Phoenix Sky Harbor (PHX) 4
Effective 2026-03-05 through 2026-03-06
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:50, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN4451
21:10
San Jose (SJC) B

23:00
Phoenix Sky Harbor (PHX) 4
Effective 2026-03-09 through 2026-04-06
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:50, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN4451
21:15
San Jose (SJC) B

23:05
Phoenix Sky Harbor (PHX) 4
Effective 2026-03-08 through 2026-04-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:50, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN4451
21:15
San Jose (SJC) B

23:05
Phoenix Sky Harbor (PHX) 4
Effective 2026-03-10 through 2026-04-01
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:50, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4451
21:25
Houston Hobby (HOU)

22:20
San Antonio (SAT) A
Effective 2026-06-09 through 2026-07-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 0:55, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4451
21:30
Houston Hobby (HOU)

22:25
San Antonio (SAT) A
Effective 2026-06-06 through 2026-08-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 0:55, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4451
22:35
Houston Hobby (HOU)

23:30
San Antonio (SAT) A
Effective 2026-06-04 through 2026-08-03
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 0:55, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4451
22:55
Houston Hobby (HOU)

23:50
San Antonio (SAT) A
Effective 2026-06-07 through 2026-08-02
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 0:55, non-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN4451
07:05
San Diego (SAN) 1

16:10
Ronald Reagan Washington (DCA) 1
Effective 2026-04-07 through 2026-06-03
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 6:05, 1-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN4451
16:20
New York LaGuardia (LGA) B

20:55
San Diego (SAN) 1
Valid until 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 7:35, 1-stop
Boeing 737 MAX 8 (7M8)
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This flight number is listed as serving the following routes:
  • Baltimore (BWI) - Orlando (MCO)
  • Chicago Midway (MDW) - Spokane (GEG)
  • Houston Hobby (HOU) - San Antonio (SAT)
  • New York LaGuardia (LGA) - Saint Louis (STL)
  • New York LaGuardia (LGA) - San Diego (SAN)
  • Saint Louis (STL) - Ronald Reagan Washington (DCA)
  • Saint Louis (STL) - San Diego (SAN)
  • San Diego (SAN) - Ronald Reagan Washington (DCA)
  • San Jose (SJC) - Phoenix Sky Harbor (PHX)
  • Tulsa (TUL) - Phoenix Sky Harbor (PHX)
All Southwest Airlines flights
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