Southwest Airlines flight WN 4237: Multiple routes

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FLIGHT SCHEDULE
Direct Flights:
Sun 05:45 Denver (DEN) 07:05 San Diego (SAN) 1
WN 4237 Non-stop Boeing 737 MAX 8 (7M8) 2:20 Effective 2025-06-08 through 2025-08-03
Sat 07:00 Houston Hobby (HOU) 11:00 Ronald Reagan Washington (DCA)
WN 4237 Non-stop Boeing 737-700 (73W) 3:00 Valid until 2025-05-31
Sun 08:05 Houston Hobby (HOU) 12:05 Ronald Reagan Washington (DCA)
WN 4237 Non-stop Boeing 737-700 (73W) 3:00 Operates only on 2025-05-25
Sun 08:05 Las Vegas Harry Reid (LAS) 1 09:25 Fresno (FAT)
WN 4237 Non-stop Boeing 737 MAX 8 (7M8) 1:20 Effective 2025-08-10 through 2025-08-24
Sun 08:05 Las Vegas Harry Reid (LAS) 1 09:25 Fresno (FAT)
WN 4237 Non-stop Boeing 737 MAX 8 (7M8) 1:20 Effective 2025-09-07 through 2025-09-28
Sun 08:15 Houston Hobby (HOU) 12:15 Ronald Reagan Washington (DCA)
WN 4237 Non-stop Boeing 737-700 (73W) 3:00 Valid until 2025-05-18
Sun 08:15 Houston Hobby (HOU) 12:15 Ronald Reagan Washington (DCA)
WN 4237 Non-stop Boeing 737-700 (73W) 3:00 Operates only on 2025-06-01
Sun 10:20 Fresno (FAT) 13:35 Denver (DEN)
WN 4237 Non-stop Boeing 737 MAX 8 (7M8) 2:15 Effective 2025-08-10 through 2025-08-24
Sun 10:20 Fresno (FAT) 13:35 Denver (DEN)
WN 4237 Non-stop Boeing 737 MAX 8 (7M8) 2:15 Effective 2025-09-07 through 2025-09-28
Sun 14:20 Denver (DEN) 20:00 Orlando (MCO)
WN 4237 Non-stop Boeing 737 MAX 8 (7M8) 3:40 Effective 2025-08-10 through 2025-08-24
Sun 14:20 Denver (DEN) 20:00 Orlando (MCO)
WN 4237 Non-stop Boeing 737 MAX 8 (7M8) 3:40 Effective 2025-09-07 through 2025-09-28
Sat 16:25 Fort Lauderdale (FLL) 1 19:25 Buffalo (BUF)
WN 4237 Non-stop Boeing 737-700 (73W) 3:00 Effective 2025-06-07 through 2025-08-02
Mon-Wed 19:00 San Diego (SAN) 1 20:40 Oakland (OAK) 2
WN 4237 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Effective 2025-11-25 through 2025-12-01
Mon,Tue,Fri,Sun 19:00 San Diego (SAN) 1 20:40 Oakland (OAK) 2
WN 4237 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Effective 2025-12-19 through 2026-01-04
Sun 19:10 San Diego (SAN) 1 20:50 Oakland (OAK) 2
WN 4237 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Operates only on 2025-11-30
Sat 19:25 San Diego (SAN) 1 21:05 Oakland (OAK) 2
WN 4237 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Effective 2025-11-22 through 2025-11-29
Sat 19:25 San Diego (SAN) 1 21:05 Oakland (OAK) 2
WN 4237 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Effective 2025-12-20 through 2026-01-03
Mon,Thu,Fri,Sun 19:40 San Diego (SAN) 1 21:20 Oakland (OAK) 2
WN 4237 Non-stop Boeing 737-800 (73H) 1:40 Effective 2025-11-02 through 2025-11-16
Tue,Wed 19:40 San Diego (SAN) 1 21:20 Oakland (OAK) 2
WN 4237 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Effective 2025-11-04 through 2025-11-12
Mon-Thu 19:40 San Diego (SAN) 1 21:20 Oakland (OAK) 2
WN 4237 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Effective 2025-11-17 through 2025-11-20
Mon,Fri,Sun 19:40 San Diego (SAN) 1 21:20 Oakland (OAK) 2
WN 4237 Non-stop Boeing 737-800 (73H) 1:40 Effective 2025-11-21 through 2025-11-28
Mon-Fri 19:40 San Diego (SAN) 1 21:20 Oakland (OAK) 2
WN 4237 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Effective 2025-12-02 through 2025-12-11
Fri,Sun 19:40 San Diego (SAN) 1 21:20 Oakland (OAK) 2
WN 4237 Non-stop Boeing 737-800 (73H) 1:40 Effective 2025-12-07 through 2025-12-14
Mon-Wed 19:40 San Diego (SAN) 1 21:20 Oakland (OAK) 2
WN 4237 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Effective 2025-12-15 through 2025-12-17
Thu 19:40 San Diego (SAN) 1 21:20 Oakland (OAK) 2
WN 4237 Non-stop Boeing 737-800 (73H) 1:40 Operates only on 2025-12-18
Wed,Thu 19:40 San Diego (SAN) 1 21:20 Oakland (OAK) 2
WN 4237 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Effective 2025-12-24 through 2026-01-01
Mon 19:40 San Diego (SAN) 1 21:20 Oakland (OAK) 2
WN 4237 Non-stop Boeing 737-800 (73H) 1:40 Operates only on 2026-01-05
Sun 20:00 Houston Hobby (HOU) 21:35 Birmingham (BHM)
WN 4237 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2025-10-05 through 2025-10-26
Sun 21:30 Oakland (OAK) 2 23:30 Spokane (GEG)
WN 4237 Non-stop Boeing 737 MAX 8 (7M8) 2:00 Operates only on 2025-11-30
Non-Direct Flights:
Sun 08:05 Las Vegas Harry Reid (LAS) 1 13:35 Denver (DEN)
WN 4237 1-stop Boeing 737 MAX 8 (7M8) 4:30 Effective 2025-08-10 through 2025-08-24
Sun 08:05 Las Vegas Harry Reid (LAS) 1 13:35 Denver (DEN)
WN 4237 1-stop Boeing 737 MAX 8 (7M8) 4:30 Effective 2025-09-07 through 2025-09-28
Sun 10:20 Fresno (FAT) 20:00 Orlando (MCO)
WN 4237 1-stop Boeing 737 MAX 8 (7M8) 6:40 Effective 2025-08-10 through 2025-08-24
Sun 10:20 Fresno (FAT) 20:00 Orlando (MCO)
WN 4237 1-stop Boeing 737 MAX 8 (7M8) 6:40 Effective 2025-09-07 through 2025-09-28
Sun 19:10 San Diego (SAN) 1 23:30 Spokane (GEG)
WN 4237 1-stop Boeing 737 MAX 8 (7M8) 4:20 Operates only on 2025-11-30
Sun 08:05 Las Vegas Harry Reid (LAS) 1 20:00 Orlando (MCO)
WN 4237 2-stop Boeing 737 MAX 8 (7M8) 8:55 Effective 2025-08-10 through 2025-08-24
Sun 08:05 Las Vegas Harry Reid (LAS) 1 20:00 Orlando (MCO)
WN 4237 2-stop Boeing 737 MAX 8 (7M8) 8:55 Effective 2025-09-07 through 2025-09-28
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This flight number is listed as serving the following routes:


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Southwest Airlines flight WN 4237: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN4237
05:45
Denver (DEN)

07:05
San Diego (SAN) 1
Effective 2025-06-08 through 2025-08-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:20, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4237
07:00
Houston Hobby (HOU)

11:00
Ronald Reagan Washington (DCA)
Valid until 2025-05-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:00, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN4237
08:05
Houston Hobby (HOU)

12:05
Ronald Reagan Washington (DCA)
Operates only on 2025-05-25
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:00, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN4237
08:05
Las Vegas Harry Reid (LAS) 1

09:25
Fresno (FAT)
Effective 2025-08-10 through 2025-08-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:20, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4237
08:05
Las Vegas Harry Reid (LAS) 1

09:25
Fresno (FAT)
Effective 2025-09-07 through 2025-09-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:20, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4237
08:15
Houston Hobby (HOU)

12:15
Ronald Reagan Washington (DCA)
Valid until 2025-05-18
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:00, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN4237
08:15
Houston Hobby (HOU)

12:15
Ronald Reagan Washington (DCA)
Operates only on 2025-06-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:00, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN4237
10:20
Fresno (FAT)

13:35
Denver (DEN)
Effective 2025-08-10 through 2025-08-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:15, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4237
10:20
Fresno (FAT)

13:35
Denver (DEN)
Effective 2025-09-07 through 2025-09-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:15, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4237
14:20
Denver (DEN)

20:00
Orlando (MCO)
Effective 2025-08-10 through 2025-08-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:40, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4237
14:20
Denver (DEN)

20:00
Orlando (MCO)
Effective 2025-09-07 through 2025-09-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:40, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4237
16:25
Fort Lauderdale (FLL) 1

19:25
Buffalo (BUF)
Effective 2025-06-07 through 2025-08-02
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:00, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN4237
19:00
San Diego (SAN) 1

20:40
Oakland (OAK) 2
Effective 2025-11-25 through 2025-12-01
Mon
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:40, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4237
19:00
San Diego (SAN) 1

20:40
Oakland (OAK) 2
Effective 2025-12-19 through 2026-01-04
Mon
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 1:40, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4237
19:10
San Diego (SAN) 1

20:50
Oakland (OAK) 2
Operates only on 2025-11-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:40, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4237
19:25
San Diego (SAN) 1

21:05
Oakland (OAK) 2
Effective 2025-11-22 through 2025-11-29
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:40, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN4237
19:25
San Diego (SAN) 1

21:05
Oakland (OAK) 2
Effective 2025-12-20 through 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:40, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN4237
19:40
San Diego (SAN) 1

21:20
Oakland (OAK) 2
Effective 2025-11-02 through 2025-11-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 1:40, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN4237
19:40
San Diego (SAN) 1

21:20
Oakland (OAK) 2
Effective 2025-11-04 through 2025-11-12
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:40, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4237
19:40
San Diego (SAN) 1

21:20
Oakland (OAK) 2
Effective 2025-11-17 through 2025-11-20
Mon
Tue
Wed
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:40, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4237
19:40
San Diego (SAN) 1

21:20
Oakland (OAK) 2
Effective 2025-11-21 through 2025-11-28
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 1:40, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN4237
19:40
San Diego (SAN) 1

21:20
Oakland (OAK) 2
Effective 2025-12-02 through 2025-12-11
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 1:40, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4237
19:40
San Diego (SAN) 1

21:20
Oakland (OAK) 2
Effective 2025-12-07 through 2025-12-14
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 1:40, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN4237
19:40
San Diego (SAN) 1

21:20
Oakland (OAK) 2
Effective 2025-12-15 through 2025-12-17
Mon
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:40, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4237
19:40
San Diego (SAN) 1

21:20
Oakland (OAK) 2
Operates only on 2025-12-18
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:40, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN4237
19:40
San Diego (SAN) 1

21:20
Oakland (OAK) 2
Effective 2025-12-24 through 2026-01-01
Mon
-
Tue
-
Wed
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:40, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4237
19:40
San Diego (SAN) 1

21:20
Oakland (OAK) 2
Operates only on 2026-01-05
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:40, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN4237
20:00
Houston Hobby (HOU)

21:35
Birmingham (BHM)
Effective 2025-10-05 through 2025-10-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN4237
21:30
Oakland (OAK) 2

23:30
Spokane (GEG)
Operates only on 2025-11-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:00, non-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
Southwest Airlines WN4237
08:05
Las Vegas Harry Reid (LAS) 1

13:35
Denver (DEN)
Effective 2025-08-10 through 2025-08-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 4:30, 1-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4237
08:05
Las Vegas Harry Reid (LAS) 1

13:35
Denver (DEN)
Effective 2025-09-07 through 2025-09-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 4:30, 1-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4237
10:20
Fresno (FAT)

20:00
Orlando (MCO)
Effective 2025-08-10 through 2025-08-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 6:40, 1-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4237
10:20
Fresno (FAT)

20:00
Orlando (MCO)
Effective 2025-09-07 through 2025-09-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 6:40, 1-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4237
19:10
San Diego (SAN) 1

23:30
Spokane (GEG)
Operates only on 2025-11-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 4:20, 1-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4237
08:05
Las Vegas Harry Reid (LAS) 1

20:00
Orlando (MCO)
Effective 2025-08-10 through 2025-08-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 8:55, 2-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4237
08:05
Las Vegas Harry Reid (LAS) 1

20:00
Orlando (MCO)
Effective 2025-09-07 through 2025-09-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 8:55, 2-stop
Boeing 737 MAX 8 (7M8)
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This flight number is listed as serving the following routes:
  • Denver (DEN) - Orlando (MCO)
  • Denver (DEN) - San Diego (SAN)
  • Fort Lauderdale (FLL) - Buffalo (BUF)
  • Fresno (FAT) - Denver (DEN)
  • Fresno (FAT) - Orlando (MCO)
  • Houston Hobby (HOU) - Birmingham (BHM)
  • Houston Hobby (HOU) - Ronald Reagan Washington (DCA)
  • Las Vegas Harry Reid (LAS) - Denver (DEN)
  • Las Vegas Harry Reid (LAS) - Fresno (FAT)
  • Las Vegas Harry Reid (LAS) - Orlando (MCO)
  • Oakland (OAK) - Spokane (GEG)
  • San Diego (SAN) - Oakland (OAK)
  • San Diego (SAN) - Spokane (GEG)
All Southwest Airlines flights
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