Southwest Airlines flight WN 4231: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Mon 05:00 Phoenix Sky Harbor (PHX) 4 09:10 Nashville (BNA)
WN 4231 Non-stop Boeing 737-800 (73H) 3:10 Operates only on 2026-01-05
Mon,Thu-Sat 05:00 San Francisco (SFO) 2 06:30 Las Vegas Harry Reid (LAS) 1
WN 4231 Non-stop Boeing 737 MAX 8 (7M8) 1:30 Effective 2026-06-04 through 2026-08-03
Sun 05:15 San Francisco (SFO) 2 06:45 Las Vegas Harry Reid (LAS) 1
WN 4231 Non-stop Boeing 737 MAX 8 (7M8) 1:30 Effective 2026-06-07 through 2026-08-02
Sun 06:00 Jacksonville (JAX) 06:35 Nashville (BNA)
WN 4231 Non-stop Boeing 737 MAX 8 (7M8) 1:35 Effective 2026-08-09 through 2026-09-27
Sat 06:15 Jacksonville (JAX) 06:50 Nashville (BNA)
WN 4231 Non-stop Boeing 737-800 (73H) 1:35 Effective 2026-08-08 through 2026-09-26
Tue,Wed 06:45 Jacksonville (JAX) 07:15 Nashville (BNA)
WN 4231 Non-stop Boeing 737-800 (73H) 1:30 Effective 2026-08-04 through 2026-09-30
Sat 07:45 Chicago Midway (MDW) 10:35 Baltimore (BWI)
WN 4231 Non-stop Boeing 737 MAX 8 (7M8) 1:50 Valid until 2026-01-03
Wed 08:25 Nashville (BNA) 10:40 Dallas Love Field (DAL) 1
WN 4231 Non-stop Boeing 737-800 (73H) 2:15 Operates only on 2026-02-18
Mon,Tue,Fri,Sun 17:55 Las Vegas Harry Reid (LAS) 1 23:10 New Orleans (MSY)
WN 4231 Non-stop Boeing 737-800 (73H) 3:15 Valid until 2026-01-04
Tue,Wed 21:40 San Jose (SJC) B 05:40 Baltimore (BWI)
WN 4231 Non-stop Boeing 737 MAX 8 (7M8) 5:00 Effective 2026-04-07 through 2026-06-03
The flight arrives 1 day after departure.
Mon,Thu-Sun 21:45 San Jose (SJC) B 05:45 Baltimore (BWI)
WN 4231 Non-stop Boeing 737 MAX 8 (7M8) 5:00 Effective 2026-04-09 through 2026-06-01
The flight arrives 1 day after departure.
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This flight number is listed as serving the following routes:


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Southwest Airlines flight WN 4231: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN4231
05:00
Phoenix Sky Harbor (PHX) 4

09:10
Nashville (BNA)
Operates only on 2026-01-05
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:10, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN4231
05:00
San Francisco (SFO) 2

06:30
Las Vegas Harry Reid (LAS) 1
Effective 2026-06-04 through 2026-08-03
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
-
Duration: 1:30, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4231
05:15
San Francisco (SFO) 2

06:45
Las Vegas Harry Reid (LAS) 1
Effective 2026-06-07 through 2026-08-02
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:30, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4231
06:00
Jacksonville (JAX)

06:35
Nashville (BNA)
Effective 2026-08-09 through 2026-09-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:35, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4231
06:15
Jacksonville (JAX)

06:50
Nashville (BNA)
Effective 2026-08-08 through 2026-09-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:35, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN4231
06:45
Jacksonville (JAX)

07:15
Nashville (BNA)
Effective 2026-08-04 through 2026-09-30
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:30, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN4231
07:45
Chicago Midway (MDW)

10:35
Baltimore (BWI)
Valid until 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:50, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4231
08:25
Nashville (BNA)

10:40
Dallas Love Field (DAL) 1
Operates only on 2026-02-18
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:15, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN4231
17:55
Las Vegas Harry Reid (LAS) 1

23:10
New Orleans (MSY)
Valid until 2026-01-04
Mon
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 3:15, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN4231
21:40
San Jose (SJC) B

05:40(+1)
Baltimore (BWI)
Effective 2026-04-07 through 2026-06-03
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 5:00, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
Direct Flights:
Southwest Airlines WN4231
21:45
San Jose (SJC) B

05:45(+1)
Baltimore (BWI)
Effective 2026-04-09 through 2026-06-01
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
Duration: 5:00, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
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This flight number is listed as serving the following routes:
  • Chicago Midway (MDW) - Baltimore (BWI)
  • Jacksonville (JAX) - Nashville (BNA)
  • Las Vegas Harry Reid (LAS) - New Orleans (MSY)
  • Nashville (BNA) - Dallas Love Field (DAL)
  • Phoenix Sky Harbor (PHX) - Nashville (BNA)
  • San Francisco (SFO) - Las Vegas Harry Reid (LAS)
  • San Jose (SJC) - Baltimore (BWI)
All Southwest Airlines flights
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