Southwest Airlines flight WN 4143: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Tue,Wed 08:10 Philadelphia (PHL) E 09:35 Saint Louis (STL) 2
WN 4143 Non-stop Boeing 737-700 (Scimitar Winglets) 2:25 Effective 2025-10-07 through 2025-10-29
Mon,Thu,Fri 11:05 San Jose (SJC) B 12:20 Ontario, Los Angeles (ONT) 4
WN 4143 Non-stop Boeing 737-700 (73W) 1:15 Effective 2025-06-05 through 2025-07-03
Mon,Thu,Fri 11:05 San Jose (SJC) B 12:20 Ontario, Los Angeles (ONT) 4
WN 4143 Non-stop Boeing 737-700 (73W) 1:15 Effective 2025-07-07 through 2025-08-04
Sun 11:50 San Jose (SJC) B 13:05 Ontario, Los Angeles (ONT) 4
WN 4143 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Effective 2025-06-08 through 2025-08-03
Tue,Wed 12:10 San Jose (SJC) B 13:25 Ontario, Los Angeles (ONT) 4
WN 4143 Non-stop Boeing 737-800 (73H) 1:15 Effective 2025-06-10 through 2025-07-30
Sat 12:45 San Jose (SJC) B 14:05 Ontario, Los Angeles (ONT) 4
WN 4143 Non-stop Boeing 737-700 (73W) 1:20 Effective 2025-06-07 through 2025-08-02
Mon,Thu,Fri 12:55 Ontario, Los Angeles (ONT) 4 14:15 Phoenix Sky Harbor (PHX) 4
WN 4143 Non-stop Boeing 737-700 (73W) 1:20 Effective 2025-06-05 through 2025-07-03
Mon,Thu,Fri 12:55 Ontario, Los Angeles (ONT) 4 14:15 Phoenix Sky Harbor (PHX) 4
WN 4143 Non-stop Boeing 737-700 (73W) 1:20 Effective 2025-07-07 through 2025-08-04
Fri 13:20 Ontario, Los Angeles (ONT) 4 14:40 Phoenix Sky Harbor (PHX) 4
WN 4143 Non-stop Boeing 737 MAX 8 (7M8) 1:20 Operates only on 2025-07-04
Sun 13:50 Albuquerque (ABQ) 14:10 Phoenix Sky Harbor (PHX) 4
WN 4143 Non-stop Boeing 737 MAX 8 (7M8) 1:20 Operates only on 2025-05-25
Mon,Thu,Fri 14:55 Phoenix Sky Harbor (PHX) 4 17:25 Salt Lake City (SLC)
WN 4143 Non-stop Boeing 737-700 (73W) 1:30 Effective 2025-06-05 through 2025-07-03
Mon,Thu,Fri 14:55 Phoenix Sky Harbor (PHX) 4 17:25 Salt Lake City (SLC)
WN 4143 Non-stop Boeing 737-700 (73W) 1:30 Effective 2025-07-07 through 2025-08-04
Sun 15:40 Raleigh/Durham (RDU) 1 16:50 Baltimore (BWI)
WN 4143 Non-stop Boeing 737 MAX 8 (7M8) 1:10 Operates only on 2025-11-30
Mon,Thu,Fri,Sun 18:35 San Jose (SJC) B 20:05 Las Vegas Harry Reid (LAS) 1
WN 4143 Non-stop Boeing 737-700 (73W) 1:30 Effective 2025-08-07 through 2025-08-29
Mon,Thu,Fri,Sun 18:35 San Jose (SJC) B 20:05 Las Vegas Harry Reid (LAS) 1
WN 4143 Non-stop Boeing 737-700 (73W) 1:30 Effective 2025-09-01 through 2025-09-29
Mon,Thu,Fri 20:05 Philadelphia (PHL) E 21:35 Saint Louis (STL) 2
WN 4143 Non-stop Boeing 737-800 (73H) 2:30 Effective 2025-10-02 through 2025-10-31
Sun 20:15 Philadelphia (PHL) E 21:45 Saint Louis (STL) 2
WN 4143 Non-stop Boeing 737-700 (Scimitar Winglets) 2:30 Effective 2025-10-05 through 2025-10-26
Non-Direct Flights:
Mon,Thu,Fri 11:05 San Jose (SJC) B 14:15 Phoenix Sky Harbor (PHX) 4
WN 4143 1-stop Boeing 737-700 (73W) 3:10 Effective 2025-06-05 through 2025-07-03
Mon,Thu,Fri 11:05 San Jose (SJC) B 14:15 Phoenix Sky Harbor (PHX) 4
WN 4143 1-stop Boeing 737-700 (73W) 3:10 Effective 2025-07-07 through 2025-08-04
Mon,Thu,Fri 12:55 Ontario, Los Angeles (ONT) 4 17:25 Salt Lake City (SLC)
WN 4143 1-stop Boeing 737-700 (73W) 3:30 Effective 2025-06-05 through 2025-07-03
Mon,Thu,Fri 12:55 Ontario, Los Angeles (ONT) 4 17:25 Salt Lake City (SLC)
WN 4143 1-stop Boeing 737-700 (73W) 3:30 Effective 2025-07-07 through 2025-08-04
Mon,Thu,Fri 11:05 San Jose (SJC) B 17:25 Salt Lake City (SLC)
WN 4143 2-stop Boeing 737-700 (73W) 5:20 Effective 2025-06-05 through 2025-07-03
Mon,Thu,Fri 11:05 San Jose (SJC) B 17:25 Salt Lake City (SLC)
WN 4143 2-stop Boeing 737-700 (73W) 5:20 Effective 2025-07-07 through 2025-08-04
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This flight number is listed as serving the following routes:


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Southwest Airlines flight WN 4143: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN4143
08:10
Philadelphia (PHL) E

09:35
Saint Louis (STL) 2
Effective 2025-10-07 through 2025-10-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:25, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN4143
11:05
San Jose (SJC) B

12:20
Ontario, Los Angeles (ONT) 4
Effective 2025-06-05 through 2025-07-03
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:15, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN4143
11:05
San Jose (SJC) B

12:20
Ontario, Los Angeles (ONT) 4
Effective 2025-07-07 through 2025-08-04
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:15, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN4143
11:50
San Jose (SJC) B

13:05
Ontario, Los Angeles (ONT) 4
Effective 2025-06-08 through 2025-08-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4143
12:10
San Jose (SJC) B

13:25
Ontario, Los Angeles (ONT) 4
Effective 2025-06-10 through 2025-07-30
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:15, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN4143
12:45
San Jose (SJC) B

14:05
Ontario, Los Angeles (ONT) 4
Effective 2025-06-07 through 2025-08-02
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:20, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN4143
12:55
Ontario, Los Angeles (ONT) 4

14:15
Phoenix Sky Harbor (PHX) 4
Effective 2025-06-05 through 2025-07-03
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:20, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN4143
12:55
Ontario, Los Angeles (ONT) 4

14:15
Phoenix Sky Harbor (PHX) 4
Effective 2025-07-07 through 2025-08-04
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:20, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN4143
13:20
Ontario, Los Angeles (ONT) 4

14:40
Phoenix Sky Harbor (PHX) 4
Operates only on 2025-07-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 1:20, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4143
13:50
Albuquerque (ABQ)

14:10
Phoenix Sky Harbor (PHX) 4
Operates only on 2025-05-25
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:20, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4143
14:55
Phoenix Sky Harbor (PHX) 4

17:25
Salt Lake City (SLC)
Effective 2025-06-05 through 2025-07-03
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:30, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN4143
14:55
Phoenix Sky Harbor (PHX) 4

17:25
Salt Lake City (SLC)
Effective 2025-07-07 through 2025-08-04
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:30, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN4143
15:40
Raleigh/Durham (RDU) 1

16:50
Baltimore (BWI)
Operates only on 2025-11-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:10, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4143
18:35
San Jose (SJC) B

20:05
Las Vegas Harry Reid (LAS) 1
Effective 2025-08-07 through 2025-08-29
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 1:30, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN4143
18:35
San Jose (SJC) B

20:05
Las Vegas Harry Reid (LAS) 1
Effective 2025-09-01 through 2025-09-29
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 1:30, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN4143
20:05
Philadelphia (PHL) E

21:35
Saint Louis (STL) 2
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 2:30, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN4143
20:15
Philadelphia (PHL) E

21:45
Saint Louis (STL) 2
Effective 2025-10-05 through 2025-10-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:30, non-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN4143
11:05
San Jose (SJC) B

14:15
Phoenix Sky Harbor (PHX) 4
Effective 2025-06-05 through 2025-07-03
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 3:10, 1-stop
Boeing 737-700 (73W)
Southwest Airlines WN4143
11:05
San Jose (SJC) B

14:15
Phoenix Sky Harbor (PHX) 4
Effective 2025-07-07 through 2025-08-04
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 3:10, 1-stop
Boeing 737-700 (73W)
Southwest Airlines WN4143
12:55
Ontario, Los Angeles (ONT) 4

17:25
Salt Lake City (SLC)
Effective 2025-06-05 through 2025-07-03
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 3:30, 1-stop
Boeing 737-700 (73W)
Southwest Airlines WN4143
12:55
Ontario, Los Angeles (ONT) 4

17:25
Salt Lake City (SLC)
Effective 2025-07-07 through 2025-08-04
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 3:30, 1-stop
Boeing 737-700 (73W)
Southwest Airlines WN4143
11:05
San Jose (SJC) B

17:25
Salt Lake City (SLC)
Effective 2025-06-05 through 2025-07-03
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 5:20, 2-stop
Boeing 737-700 (73W)
Southwest Airlines WN4143
11:05
San Jose (SJC) B

17:25
Salt Lake City (SLC)
Effective 2025-07-07 through 2025-08-04
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 5:20, 2-stop
Boeing 737-700 (73W)
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This flight number is listed as serving the following routes:
  • Albuquerque (ABQ) - Phoenix Sky Harbor (PHX)
  • Ontario, Los Angeles (ONT) - Phoenix Sky Harbor (PHX)
  • Ontario, Los Angeles (ONT) - Salt Lake City (SLC)
  • Philadelphia (PHL) - Saint Louis (STL)
  • Phoenix Sky Harbor (PHX) - Salt Lake City (SLC)
  • Raleigh/Durham (RDU) - Baltimore (BWI)
  • San Jose (SJC) - Las Vegas Harry Reid (LAS)
  • San Jose (SJC) - Ontario, Los Angeles (ONT)
  • San Jose (SJC) - Phoenix Sky Harbor (PHX)
  • San Jose (SJC) - Salt Lake City (SLC)
All Southwest Airlines flights
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