Southwest Airlines flight WN 3143: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Sun 06:10 Ronald Reagan Washington (DCA) 1 07:50 Kansas City (MCI)
WN 3143 Non-stop Boeing 737-700 (Scimitar Winglets) 2:40 Effective 2026-08-09 through 2026-09-27
Tue,Wed,Sat 06:55 Ronald Reagan Washington (DCA) 1 08:40 Kansas City (MCI)
WN 3143 Non-stop Boeing 737-700 (Scimitar Winglets) 2:45 Effective 2026-08-04 through 2026-09-30
Mon-Fri 12:00 Ronald Reagan Washington (DCA) 1 13:35 Saint Louis (STL) 2
WN 3143 Non-stop Boeing 737-800 (73H) 2:35 Effective 2026-01-06 through 2026-01-14
Thu,Fri,Sun 12:00 Ronald Reagan Washington (DCA) 1 13:35 Saint Louis (STL) 2
WN 3143 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-01-11 through 2026-01-16
Tue-Fri,Sun 12:00 Ronald Reagan Washington (DCA) 1 13:35 Saint Louis (STL) 2
WN 3143 Non-stop Boeing 737-800 (73H) 2:35 Effective 2026-01-18 through 2026-01-23
Mon,Sun 12:00 Ronald Reagan Washington (DCA) 1 13:35 Saint Louis (STL) 2
WN 3143 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-01-19 through 2026-01-25
Mon-Fri 12:00 Ronald Reagan Washington (DCA) 1 13:35 Saint Louis (STL) 2
WN 3143 Non-stop Boeing 737-800 (73H) 2:35 Effective 2026-01-26 through 2026-02-04
Thu,Fri,Sun 12:00 Ronald Reagan Washington (DCA) 1 13:35 Saint Louis (STL) 2
WN 3143 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-02-01 through 2026-02-06
Tue,Wed,Sun 12:00 Ronald Reagan Washington (DCA) 1 13:35 Saint Louis (STL) 2
WN 3143 Non-stop Boeing 737-800 (73H) 2:35 Effective 2026-02-08 through 2026-02-11
Mon,Sun 12:00 Ronald Reagan Washington (DCA) 1 13:35 Saint Louis (STL) 2
WN 3143 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-02-09 through 2026-02-15
Mon,Tue,Thu 12:00 Ronald Reagan Washington (DCA) 1 13:35 Saint Louis (STL) 2
WN 3143 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-02-17 through 2026-02-23
Tue,Wed 12:00 Ronald Reagan Washington (DCA) 1 13:35 Saint Louis (STL) 2
WN 3143 Non-stop Boeing 737-800 (73H) 2:35 Effective 2026-02-18 through 2026-03-04
Mon 12:00 Ronald Reagan Washington (DCA) 1 13:35 Saint Louis (STL) 2
WN 3143 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Operates only on 2026-03-02
Sat 12:35 Ronald Reagan Washington (DCA) 1 14:05 Saint Louis (STL) 2
WN 3143 Non-stop Boeing 737 MAX 8 (7M8) 2:30 Effective 2026-01-10 through 2026-02-07
Wed,Thu 14:40 Las Vegas Harry Reid (LAS) 1 17:25 Colorado Springs (COS)
WN 3143 Non-stop Boeing 737-700 (73W) 1:45 Valid until 2026-01-01
Sat 15:55 Fort Myers (RSW) 18:50 Buffalo (BUF)
WN 3143 Non-stop Boeing 737-800 (73H) 2:55 Effective 2026-02-14 through 2026-02-28
Sun 16:30 Las Vegas Harry Reid (LAS) 1 17:35 Ontario, Los Angeles (ONT) 4
WN 3143 Non-stop Boeing 737-700 (Scimitar Winglets) 1:05 Operates only on 2026-05-24
Sun 18:10 Ontario, Los Angeles (ONT) 4 19:30 Oakland (OAK) 2
WN 3143 Non-stop Boeing 737-700 (Scimitar Winglets) 1:20 Operates only on 2026-05-24
Mon,Thu,Fri 20:15 Ronald Reagan Washington (DCA) 1 22:00 Kansas City (MCI)
WN 3143 Non-stop Boeing 737-700 (Scimitar Winglets) 2:45 Effective 2026-08-06 through 2026-09-28
Sun 21:15 Ontario, Los Angeles (ONT) 4 22:35 Oakland (OAK) 2
WN 3143 Non-stop Boeing 737-800 (73H) 1:20 Effective 2026-04-12 through 2026-05-17
Sun 21:15 Ontario, Los Angeles (ONT) 4 22:35 Oakland (OAK) 2
WN 3143 Non-stop Boeing 737-800 (73H) 1:20 Operates only on 2026-05-31
Mon,Tue,Fri,Sun 21:30 Las Vegas Harry Reid (LAS) 1 00:15 Colorado Springs (COS)
WN 3143 Non-stop Boeing 737-800 (73H) 1:45 Valid until 2026-01-04
The flight arrives 1 day after departure.
Daily 21:40 Ontario, Los Angeles (ONT) 4 05:30 Baltimore (BWI)
WN 3143 Non-stop Boeing 737-700 (Scimitar Winglets) 4:50 Effective 2026-06-04 through 2026-08-03
The flight arrives 1 day after departure.
Non-Direct Flights:
Sun 16:30 Las Vegas Harry Reid (LAS) 1 19:30 Oakland (OAK) 2
WN 3143 1-stop Boeing 737-700 (Scimitar Winglets) 3:00 Operates only on 2026-05-24
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This flight number is listed as serving the following routes:


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Southwest Airlines flight WN 3143: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN3143
06:10
Ronald Reagan Washington (DCA) 1

07:50
Kansas City (MCI)
Effective 2026-08-09 through 2026-09-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:40, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN3143
06:55
Ronald Reagan Washington (DCA) 1

08:40
Kansas City (MCI)
Effective 2026-08-04 through 2026-09-30
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:45, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN3143
12:00
Ronald Reagan Washington (DCA) 1

13:35
Saint Louis (STL) 2
Effective 2026-01-06 through 2026-01-14
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 2:35, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN3143
12:00
Ronald Reagan Washington (DCA) 1

13:35
Saint Louis (STL) 2
Effective 2026-01-11 through 2026-01-16
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3143
12:00
Ronald Reagan Washington (DCA) 1

13:35
Saint Louis (STL) 2
Effective 2026-01-18 through 2026-01-23
Mon
-
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:35, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN3143
12:00
Ronald Reagan Washington (DCA) 1

13:35
Saint Louis (STL) 2
Effective 2026-01-19 through 2026-01-25
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3143
12:00
Ronald Reagan Washington (DCA) 1

13:35
Saint Louis (STL) 2
Effective 2026-01-26 through 2026-02-04
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 2:35, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN3143
12:00
Ronald Reagan Washington (DCA) 1

13:35
Saint Louis (STL) 2
Effective 2026-02-01 through 2026-02-06
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3143
12:00
Ronald Reagan Washington (DCA) 1

13:35
Saint Louis (STL) 2
Effective 2026-02-08 through 2026-02-11
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:35, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN3143
12:00
Ronald Reagan Washington (DCA) 1

13:35
Saint Louis (STL) 2
Effective 2026-02-09 through 2026-02-15
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3143
12:00
Ronald Reagan Washington (DCA) 1

13:35
Saint Louis (STL) 2
Effective 2026-02-17 through 2026-02-23
Mon
Tue
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3143
12:00
Ronald Reagan Washington (DCA) 1

13:35
Saint Louis (STL) 2
Effective 2026-02-18 through 2026-03-04
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:35, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN3143
12:00
Ronald Reagan Washington (DCA) 1

13:35
Saint Louis (STL) 2
Operates only on 2026-03-02
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3143
12:35
Ronald Reagan Washington (DCA) 1

14:05
Saint Louis (STL) 2
Effective 2026-01-10 through 2026-02-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:30, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3143
14:40
Las Vegas Harry Reid (LAS) 1

17:25
Colorado Springs (COS)
Valid until 2026-01-01
Mon
-
Tue
-
Wed
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:45, non-stop
Boeing 737-700 (73W)
Direct Flights:
Southwest Airlines WN3143
15:55
Fort Myers (RSW)

18:50
Buffalo (BUF)
Effective 2026-02-14 through 2026-02-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:55, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN3143
16:30
Las Vegas Harry Reid (LAS) 1

17:35
Ontario, Los Angeles (ONT) 4
Operates only on 2026-05-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:05, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN3143
18:10
Ontario, Los Angeles (ONT) 4

19:30
Oakland (OAK) 2
Operates only on 2026-05-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:20, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN3143
20:15
Ronald Reagan Washington (DCA) 1

22:00
Kansas City (MCI)
Effective 2026-08-06 through 2026-09-28
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 2:45, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN3143
21:15
Ontario, Los Angeles (ONT) 4

22:35
Oakland (OAK) 2
Effective 2026-04-12 through 2026-05-17
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:20, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN3143
21:15
Ontario, Los Angeles (ONT) 4

22:35
Oakland (OAK) 2
Operates only on 2026-05-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:20, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN3143
21:30
Las Vegas Harry Reid (LAS) 1

00:15(+1)
Colorado Springs (COS)
Valid until 2026-01-04
Mon
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 1:45, non-stop
Boeing 737-800 (73H)
The flight arrives 1 day after departure.
Direct Flights:
Southwest Airlines WN3143
21:40
Ontario, Los Angeles (ONT) 4

05:30(+1)
Baltimore (BWI)
Effective 2026-06-04 through 2026-08-03
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:50, non-stop
Boeing 737-700 (Scimitar Winglets)
The flight arrives 1 day after departure.
Non-Direct Flights:
Southwest Airlines WN3143
16:30
Las Vegas Harry Reid (LAS) 1

19:30
Oakland (OAK) 2
Operates only on 2026-05-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:00, 1-stop
Boeing 737-700 (Scimitar Winglets)
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This flight number is listed as serving the following routes:
  • Fort Myers (RSW) - Buffalo (BUF)
  • Las Vegas Harry Reid (LAS) - Colorado Springs (COS)
  • Las Vegas Harry Reid (LAS) - Oakland (OAK)
  • Las Vegas Harry Reid (LAS) - Ontario, Los Angeles (ONT)
  • Ontario, Los Angeles (ONT) - Baltimore (BWI)
  • Ontario, Los Angeles (ONT) - Oakland (OAK)
  • Ronald Reagan Washington (DCA) - Kansas City (MCI)
  • Ronald Reagan Washington (DCA) - Saint Louis (STL)
All Southwest Airlines flights
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