Southwest Airlines flight WN 4151: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Sat 05:05 Chicago Midway (MDW) 08:45 Fort Myers (RSW)
WN 4151 Non-stop Boeing 737-700 (Scimitar Winglets) 2:40 Effective 2026-06-06 through 2026-08-01
Wed,Thu 05:45 Phoenix Sky Harbor (PHX) 4 09:35 Saint Louis (STL) 2
WN 4151 Non-stop Boeing 737 MAX 8 (7M8) 2:50 Valid until 2026-01-01
Thu,Fri 07:00 Chicago O'Hare (ORD) 5 10:00 Phoenix Sky Harbor (PHX) 4
WN 4151 Non-stop Boeing 737-700 (Scimitar Winglets) 4:00 Effective 2026-03-05 through 2026-03-06
Sat 07:00 Chicago O'Hare (ORD) 5 10:00 Phoenix Sky Harbor (PHX) 4
WN 4151 Non-stop Boeing 737-800 (73H) 4:00 Operates only on 2026-03-07
Sat,Sun 07:00 Chicago O'Hare (ORD) 5 09:00 Phoenix Sky Harbor (PHX) 4
WN 4151 Non-stop Boeing 737-800 (73H) 4:00 Effective 2026-03-08 through 2026-04-05
Mon-Fri 07:00 Chicago O'Hare (ORD) 5 09:00 Phoenix Sky Harbor (PHX) 4
WN 4151 Non-stop Boeing 737-700 (Scimitar Winglets) 4:00 Effective 2026-03-09 through 2026-04-06
Mon,Thu,Fri 09:35 Phoenix Sky Harbor (PHX) 4 11:50 Oakland (OAK) 2
WN 4151 Non-stop Boeing 737-700 (Scimitar Winglets) 2:15 Effective 2026-03-09 through 2026-04-06
Tue,Wed 09:35 Phoenix Sky Harbor (PHX) 4 11:00 San Diego (SAN) 1
WN 4151 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Effective 2026-03-10 through 2026-04-01
Sat 09:40 Phoenix Sky Harbor (PHX) 4 12:30 Portland (PDX)
WN 4151 Non-stop Boeing 737-800 (73H) 2:50 Effective 2026-03-14 through 2026-04-04
Thu,Fri 10:35 Phoenix Sky Harbor (PHX) 4 11:50 Oakland (OAK) 2
WN 4151 Non-stop Boeing 737-700 (Scimitar Winglets) 2:15 Effective 2026-03-05 through 2026-03-06
Sat 10:40 Phoenix Sky Harbor (PHX) 4 12:30 Portland (PDX)
WN 4151 Non-stop Boeing 737-800 (73H) 2:50 Operates only on 2026-03-07
Fri 13:00 Houston Hobby (HOU) 15:00 Saint Louis (STL) 2
WN 4151 Non-stop Boeing 737 MAX 8 (7M8) 2:00 Operates only on 2026-02-13
Sat 13:15 Phoenix Sky Harbor (PHX) 4 17:05 Saint Louis (STL) 2
WN 4151 Non-stop Boeing 737 MAX 8 (7M8) 2:50 Valid until 2026-01-03
Mon,Tue,Fri,Sun 14:25 Phoenix Sky Harbor (PHX) 4 18:15 Saint Louis (STL) 2
WN 4151 Non-stop Boeing 737 MAX 8 (7M8) 2:50 Valid until 2026-01-05
Sun 16:50 San Diego (SAN) 1 20:15 Denver (DEN)
WN 4151 Non-stop Boeing 737 MAX 8 (7M8) 2:25 Effective 2026-06-07 through 2026-08-02
Mon,Thu,Fri 17:20 San Diego (SAN) 1 20:40 Denver (DEN)
WN 4151 Non-stop Boeing 737 MAX 8 (7M8) 2:20 Effective 2026-06-04 through 2026-08-03
Tue,Wed 17:20 San Diego (SAN) 1 20:40 Denver (DEN)
WN 4151 Non-stop Boeing 737-700 (Scimitar Winglets) 2:20 Effective 2026-06-09 through 2026-07-29
Thu 18:00 Chicago Midway (MDW) 20:50 Atlanta (ATL) N
WN 4151 Non-stop Boeing 737-800 (73H) 1:50 Operates only on 2026-02-05
Sun 18:15 Las Vegas Harry Reid (LAS) 1 01:00 Louisville (SDF)
WN 4151 Non-stop Boeing 737-700 (Scimitar Winglets) 3:45 Effective 2026-08-09 through 2026-09-27
The flight arrives 1 day after departure.
Non-Direct Flights:
Mon,Thu,Fri 07:00 Chicago O'Hare (ORD) 5 11:50 Oakland (OAK) 2
WN 4151 1-stop Boeing 737-700 (Scimitar Winglets) 6:50 Effective 2026-03-05 through 2026-04-06
Sat 07:00 Chicago O'Hare (ORD) 5 12:30 Portland (PDX)
WN 4151 1-stop Boeing 737-800 (73H) 7:30 Effective 2026-03-07 through 2026-04-04
Tue,Wed 07:00 Chicago O'Hare (ORD) 5 11:00 San Diego (SAN) 1
WN 4151 1-stop Boeing 737-700 (Scimitar Winglets) 6:00 Effective 2026-03-10 through 2026-04-01
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This flight number is listed as serving the following routes:


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Southwest Airlines flight WN 4151: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN4151
05:05
Chicago Midway (MDW)

08:45
Fort Myers (RSW)
Effective 2026-06-06 through 2026-08-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:40, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4151
05:45
Phoenix Sky Harbor (PHX) 4

09:35
Saint Louis (STL) 2
Valid until 2026-01-01
Mon
-
Tue
-
Wed
Thu
Fri
-
Sat
-
Sun
-
Duration: 2:50, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4151
07:00
Chicago O'Hare (ORD) 5

10:00
Phoenix Sky Harbor (PHX) 4
Effective 2026-03-05 through 2026-03-06
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 4:00, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4151
07:00
Chicago O'Hare (ORD) 5

10:00
Phoenix Sky Harbor (PHX) 4
Operates only on 2026-03-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 4:00, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN4151
07:00
Chicago O'Hare (ORD) 5

09:00
Phoenix Sky Harbor (PHX) 4
Effective 2026-03-08 through 2026-04-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
Duration: 4:00, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN4151
07:00
Chicago O'Hare (ORD) 5

09:00
Phoenix Sky Harbor (PHX) 4
Effective 2026-03-09 through 2026-04-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 4:00, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4151
09:35
Phoenix Sky Harbor (PHX) 4

11:50
Oakland (OAK) 2
Effective 2026-03-09 through 2026-04-06
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 2:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4151
09:35
Phoenix Sky Harbor (PHX) 4

11:00
San Diego (SAN) 1
Effective 2026-03-10 through 2026-04-01
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4151
09:40
Phoenix Sky Harbor (PHX) 4

12:30
Portland (PDX)
Effective 2026-03-14 through 2026-04-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:50, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN4151
10:35
Phoenix Sky Harbor (PHX) 4

11:50
Oakland (OAK) 2
Effective 2026-03-05 through 2026-03-06
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 2:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4151
10:40
Phoenix Sky Harbor (PHX) 4

12:30
Portland (PDX)
Operates only on 2026-03-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:50, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN4151
13:00
Houston Hobby (HOU)

15:00
Saint Louis (STL) 2
Operates only on 2026-02-13
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 2:00, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4151
13:15
Phoenix Sky Harbor (PHX) 4

17:05
Saint Louis (STL) 2
Valid until 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:50, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4151
14:25
Phoenix Sky Harbor (PHX) 4

18:15
Saint Louis (STL) 2
Valid until 2026-01-05
Mon
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 2:50, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4151
16:50
San Diego (SAN) 1

20:15
Denver (DEN)
Effective 2026-06-07 through 2026-08-02
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:25, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4151
17:20
San Diego (SAN) 1

20:40
Denver (DEN)
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 WN4151
17:20
San Diego (SAN) 1

20:40
Denver (DEN)
Effective 2026-06-09 through 2026-07-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:20, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4151
18:00
Chicago Midway (MDW)

20:50
Atlanta (ATL) N
Operates only on 2026-02-05
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:50, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN4151
18:15
Las Vegas Harry Reid (LAS) 1

01:00(+1)
Louisville (SDF)
Effective 2026-08-09 through 2026-09-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:45, non-stop
Boeing 737-700 (Scimitar Winglets)
The flight arrives 1 day after departure.
Non-Direct Flights:
Southwest Airlines WN4151
07:00
Chicago O'Hare (ORD) 5

11:50
Oakland (OAK) 2
Effective 2026-03-05 through 2026-04-06
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 6:50, 1-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN4151
07:00
Chicago O'Hare (ORD) 5

12:30
Portland (PDX)
Effective 2026-03-07 through 2026-04-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 7:30, 1-stop
Boeing 737-800 (73H)
Non-Direct Flights:
Southwest Airlines WN4151
07:00
Chicago O'Hare (ORD) 5

11:00
San Diego (SAN) 1
Effective 2026-03-10 through 2026-04-01
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 6:00, 1-stop
Boeing 737-700 (Scimitar Winglets)
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This flight number is listed as serving the following routes:
  • Chicago Midway (MDW) - Atlanta (ATL)
  • Chicago Midway (MDW) - Fort Myers (RSW)
  • Chicago O'Hare (ORD) - Oakland (OAK)
  • Chicago O'Hare (ORD) - Phoenix Sky Harbor (PHX)
  • Chicago O'Hare (ORD) - Portland (PDX)
  • Chicago O'Hare (ORD) - San Diego (SAN)
  • Houston Hobby (HOU) - Saint Louis (STL)
  • Las Vegas Harry Reid (LAS) - Louisville (SDF)
  • Phoenix Sky Harbor (PHX) - Oakland (OAK)
  • Phoenix Sky Harbor (PHX) - Portland (PDX)
  • Phoenix Sky Harbor (PHX) - Saint Louis (STL)
  • Phoenix Sky Harbor (PHX) - San Diego (SAN)
  • San Diego (SAN) - Denver (DEN)
All Southwest Airlines flights
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