Southwest Airlines flight WN 4123: Multiple routes

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Mon,Tue,Fri 05:10 Chicago Midway (MDW) 07:05 Las Vegas Harry Reid (LAS) 1
WN 4123 Non-stop Boeing 737 MAX 8 (7M8) 3:55 Valid until 2026-01-02
Sun 05:40 Chicago Midway (MDW) 07:35 Las Vegas Harry Reid (LAS) 1
WN 4123 Non-stop Boeing 737-800 (73H) 3:55 Valid until 2026-01-04
Sat 06:05 Chicago Midway (MDW) 08:05 Las Vegas Harry Reid (LAS) 1
WN 4123 Non-stop Boeing 737-800 (73H) 4:00 Valid until 2026-01-03
Sun 06:15 San Antonio (SAT) A 06:35 Phoenix Sky Harbor (PHX) 4
WN 4123 Non-stop Boeing 737 MAX 8 (7M8) 2:20 Effective 2026-06-07 through 2026-08-02
Mon,Thu-Sat 06:35 San Antonio (SAT) A 06:55 Phoenix Sky Harbor (PHX) 4
WN 4123 Non-stop Boeing 737 MAX 8 (7M8) 2:20 Effective 2026-06-04 through 2026-08-03
Mon 06:40 San Diego (SAN) 1 08:10 Las Vegas Harry Reid (LAS) 1
WN 4123 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Operates only on 2026-01-05
Tue,Wed 06:45 San Antonio (SAT) A 07:05 Phoenix Sky Harbor (PHX) 4
WN 4123 Non-stop Boeing 737 MAX 8 (7M8) 2:20 Effective 2026-06-09 through 2026-07-29
Mon,Thu,Fri 13:25 Las Vegas Harry Reid (LAS) 1 14:50 Fresno (FAT)
WN 4123 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Effective 2026-08-06 through 2026-09-28
Sat 13:55 Saint Louis (STL) 2 15:30 Phoenix Sky Harbor (PHX) 4
WN 4123 Non-stop Boeing 737 MAX 8 (7M8) 3:35 Effective 2026-03-14 through 2026-04-04
Mon,Thu,Fri 14:25 Omaha (OMA) 15:50 Chicago Midway (MDW)
WN 4123 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Effective 2026-03-05 through 2026-04-06
Thu 17:00 Saint Louis (STL) 2 19:15 Houston Hobby (HOU)
WN 4123 Non-stop Boeing 737-800 (73H) 2:15 Valid until 2026-01-01
Sat 19:15 Las Vegas Harry Reid (LAS) 1 20:30 Fresno (FAT)
WN 4123 Non-stop Boeing 737-800 (73H) 1:15 Effective 2026-08-08 through 2026-09-26
Tue,Wed 19:40 Las Vegas Harry Reid (LAS) 1 20:55 Fresno (FAT)
WN 4123 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Effective 2026-08-04 through 2026-09-30
Tue,Wed 20:30 San Diego (SAN) 1 22:00 San Jose (SJC) B
WN 4123 Non-stop Boeing 737 MAX 8 (7M8) 1:30 Effective 2026-04-07 through 2026-06-03
Sun 20:50 San Diego (SAN) 1 22:15 San Jose (SJC) B
WN 4123 Non-stop Boeing 737-800 (73H) 1:25 Effective 2026-04-12 through 2026-05-17
Sun 20:50 San Diego (SAN) 1 22:15 San Jose (SJC) B
WN 4123 Non-stop Boeing 737-800 (73H) 1:25 Operates only on 2026-05-31
Mon,Thu,Fri 21:00 San Diego (SAN) 1 22:25 San Jose (SJC) B
WN 4123 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Effective 2026-04-09 through 2026-06-01
Sun 21:55 Las Vegas Harry Reid (LAS) 1 23:10 Fresno (FAT)
WN 4123 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Effective 2026-08-09 through 2026-09-27
This flight number is listed as serving the following routes:


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Southwest Airlines flight WN 4123: Multiple routes
Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN4123
05:10
Chicago Midway (MDW)

07:05
Las Vegas Harry Reid (LAS) 1
Valid until 2026-01-02
Mon
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 3:55, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4123
05:40
Chicago Midway (MDW)

07:35
Las Vegas Harry Reid (LAS) 1
Valid until 2026-01-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:55, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN4123
06:05
Chicago Midway (MDW)

08:05
Las Vegas Harry Reid (LAS) 1
Valid until 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 4:00, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN4123
06:15
San Antonio (SAT) A

06:35
Phoenix Sky Harbor (PHX) 4
Effective 2026-06-07 through 2026-08-02
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:20, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4123
06:35
San Antonio (SAT) A

06:55
Phoenix Sky Harbor (PHX) 4
Effective 2026-06-04 through 2026-08-03
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
-
Duration: 2:20, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4123
06:40
San Diego (SAN) 1

08:10
Las Vegas Harry Reid (LAS) 1
Operates only on 2026-01-05
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:30, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4123
06:45
San Antonio (SAT) A

07:05
Phoenix Sky Harbor (PHX) 4
Effective 2026-06-09 through 2026-07-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:20, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4123
13:25
Las Vegas Harry Reid (LAS) 1

14:50
Fresno (FAT)
Effective 2026-08-06 through 2026-09-28
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4123
13:55
Saint Louis (STL) 2

15:30
Phoenix Sky Harbor (PHX) 4
Effective 2026-03-14 through 2026-04-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:35, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4123
14:25
Omaha (OMA)

15:50
Chicago Midway (MDW)
Effective 2026-03-05 through 2026-04-06
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4123
17:00
Saint Louis (STL) 2

19:15
Houston Hobby (HOU)
Valid until 2026-01-01
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 2:15, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN4123
19:15
Las Vegas Harry Reid (LAS) 1

20:30
Fresno (FAT)
Effective 2026-08-08 through 2026-09-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:15, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN4123
19:40
Las Vegas Harry Reid (LAS) 1

20:55
Fresno (FAT)
Effective 2026-08-04 through 2026-09-30
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4123
20:30
San Diego (SAN) 1

22:00
San Jose (SJC) B
Effective 2026-04-07 through 2026-06-03
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:30, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4123
20:50
San Diego (SAN) 1

22:15
San Jose (SJC) B
Effective 2026-04-12 through 2026-05-17
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:25, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN4123
20:50
San Diego (SAN) 1

22:15
San Jose (SJC) B
Operates only on 2026-05-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:25, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN4123
21:00
San Diego (SAN) 1

22:25
San Jose (SJC) B
Effective 2026-04-09 through 2026-06-01
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4123
21:55
Las Vegas Harry Reid (LAS) 1

23:10
Fresno (FAT)
Effective 2026-08-09 through 2026-09-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
This flight number is listed as serving the following routes:
  • Chicago Midway (MDW) - Las Vegas Harry Reid (LAS)
  • Las Vegas Harry Reid (LAS) - Fresno (FAT)
  • Omaha (OMA) - Chicago Midway (MDW)
  • Saint Louis (STL) - Houston Hobby (HOU)
  • Saint Louis (STL) - Phoenix Sky Harbor (PHX)
  • San Antonio (SAT) - Phoenix Sky Harbor (PHX)
  • San Diego (SAN) - Las Vegas Harry Reid (LAS)
  • San Diego (SAN) - San Jose (SJC)
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