Southwest Airlines flight WN 4503: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Thu,Fri,Sun 05:00 Saint Louis (STL) 2 06:40 Las Vegas Harry Reid (LAS) 1
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 3:40 Effective 2026-01-11 through 2026-01-16
Mon,Sun 05:00 Saint Louis (STL) 2 06:40 Las Vegas Harry Reid (LAS) 1
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 3:40 Effective 2026-01-19 through 2026-01-25
Thu,Fri,Sun 05:00 Saint Louis (STL) 2 06:40 Las Vegas Harry Reid (LAS) 1
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 3:40 Effective 2026-02-01 through 2026-02-06
Mon,Sun 05:00 Saint Louis (STL) 2 06:40 Las Vegas Harry Reid (LAS) 1
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 3:40 Effective 2026-02-09 through 2026-02-15
Mon,Tue,Thu 05:00 Saint Louis (STL) 2 06:40 Las Vegas Harry Reid (LAS) 1
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 3:40 Effective 2026-02-17 through 2026-02-23
Mon 05:00 Saint Louis (STL) 2 06:40 Las Vegas Harry Reid (LAS) 1
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 3:40 Operates only on 2026-03-02
Mon,Thu,Fri 05:05 Saint Louis (STL) 2 06:50 Las Vegas Harry Reid (LAS) 1
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 3:45 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 05:05 Saint Louis (STL) 2 06:50 Las Vegas Harry Reid (LAS) 1
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 3:45 Effective 2026-02-20 through 2026-03-01
Mon-Sat 06:00 Saint Louis (STL) 2 07:45 Las Vegas Harry Reid (LAS) 1
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 3:45 Effective 2026-01-06 through 2026-01-14
Tue-Sun 06:00 Saint Louis (STL) 2 07:45 Las Vegas Harry Reid (LAS) 1
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 3:45 Effective 2026-01-17 through 2026-01-24
Mon-Sat 06:00 Saint Louis (STL) 2 07:45 Las Vegas Harry Reid (LAS) 1
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 3:45 Effective 2026-01-26 through 2026-02-04
Tue,Wed,Sat,Sun 06:00 Saint Louis (STL) 2 07:45 Las Vegas Harry Reid (LAS) 1
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 3:45 Effective 2026-02-07 through 2026-02-14
Tue,Wed,Sat 06:00 Saint Louis (STL) 2 07:45 Las Vegas Harry Reid (LAS) 1
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 3:45 Effective 2026-02-18 through 2026-03-04
Mon-Fri 08:25 Las Vegas Harry Reid (LAS) 1 10:50 Salt Lake City (SLC)
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Effective 2026-01-06 through 2026-01-14
Tue-Fri,Sun 08:25 Las Vegas Harry Reid (LAS) 1 10:50 Salt Lake City (SLC)
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Effective 2026-01-18 through 2026-01-23
Mon-Fri 08:25 Las Vegas Harry Reid (LAS) 1 10:50 Salt Lake City (SLC)
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Effective 2026-01-26 through 2026-02-04
Tue,Wed,Sun 08:25 Las Vegas Harry Reid (LAS) 1 10:50 Salt Lake City (SLC)
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Effective 2026-02-08 through 2026-02-11
Tue,Wed 08:25 Las Vegas Harry Reid (LAS) 1 10:50 Salt Lake City (SLC)
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Effective 2026-02-18 through 2026-03-04
Sat 14:30 Santa Ana (SNA) 17:45 Denver (DEN)
WN 4503 Non-stop Boeing 737-700 (Scimitar Winglets) 2:15 Effective 2026-03-07 through 2026-04-04
Mon,Thu,Fri 14:55 Santa Ana (SNA) 18:10 Denver (DEN)
WN 4503 Non-stop Boeing 737-700 (Scimitar Winglets) 2:15 Effective 2026-03-05 through 2026-04-06
Sat 16:50 Louisville (SDF) 17:10 Chicago Midway (MDW)
WN 4503 Non-stop Boeing 737-700 (Scimitar Winglets) 1:20 Effective 2026-08-08 through 2026-09-26
Sat 18:10 Savannah (SAV) 19:30 Chicago Midway (MDW)
WN 4503 Non-stop Boeing 737-700 (Scimitar Winglets) 2:20 Operates only on 2026-01-03
Sat 18:25 Denver (DEN) 19:15 Colorado Springs (COS)
WN 4503 Non-stop Boeing 737-700 (Scimitar Winglets) 0:50 Effective 2026-03-07 through 2026-04-04
Tue,Wed 18:50 Louisville (SDF) 19:05 Chicago Midway (MDW)
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Effective 2026-08-04 through 2026-09-30
Mon,Thu,Fri 19:10 Louisville (SDF) 19:25 Chicago Midway (MDW)
WN 4503 Non-stop Boeing 737-800 (73H) 1:15 Effective 2026-08-06 through 2026-09-28
Sun 19:25 Louisville (SDF) 19:40 Chicago Midway (MDW)
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Effective 2026-08-09 through 2026-09-27
Tue,Wed 19:55 Oakland (OAK) 2 21:30 Las Vegas Harry Reid (LAS) 1
WN 4503 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-06-09 through 2026-07-29
Sat 20:15 Chicago Midway (MDW) 21:30 Saint Louis (STL) 2
WN 4503 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Operates only on 2026-01-03
Sat 20:35 Oakland (OAK) 2 22:10 Las Vegas Harry Reid (LAS) 1
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 1:35 Effective 2026-06-06 through 2026-08-01
Sun 20:40 Oakland (OAK) 2 22:15 Las Vegas Harry Reid (LAS) 1
WN 4503 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-06-07 through 2026-08-02
Tue,Wed 20:45 Dallas Love Field (DAL) 1 22:15 Kansas City (MCI)
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 1:30 Effective 2026-04-07 through 2026-06-03
Mon,Thu,Fri 21:05 Oakland (OAK) 2 22:40 Las Vegas Harry Reid (LAS) 1
WN 4503 Non-stop Boeing 737-800 (73H) 1:35 Effective 2026-06-04 through 2026-08-03
Mon,Tue,Fri,Sun 22:50 Chicago Midway (MDW) 00:05 Saint Louis (STL) 2
WN 4503 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Valid until 2026-01-04
The flight arrives 1 day after departure.
Sun 22:55 Dallas Love Field (DAL) 1 00:25 Kansas City (MCI)
WN 4503 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Effective 2026-04-12 through 2026-05-17
The flight arrives 1 day after departure.
Sun 22:55 Dallas Love Field (DAL) 1 00:25 Kansas City (MCI)
WN 4503 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Operates only on 2026-05-31
The flight arrives 1 day after departure.
Non-Direct Flights:
Mon-Fri 06:00 Saint Louis (STL) 2 10:50 Salt Lake City (SLC)
WN 4503 1-stop Boeing 737 MAX 8 (7M8) 5:50 Effective 2026-01-06 through 2026-01-14
Tue-Fri,Sun 06:00 Saint Louis (STL) 2 10:50 Salt Lake City (SLC)
WN 4503 1-stop Boeing 737 MAX 8 (7M8) 5:50 Effective 2026-01-18 through 2026-01-23
Mon-Fri 06:00 Saint Louis (STL) 2 10:50 Salt Lake City (SLC)
WN 4503 1-stop Boeing 737 MAX 8 (7M8) 5:50 Effective 2026-01-26 through 2026-02-04
Tue,Wed,Sun 06:00 Saint Louis (STL) 2 10:50 Salt Lake City (SLC)
WN 4503 1-stop Boeing 737 MAX 8 (7M8) 5:50 Effective 2026-02-08 through 2026-02-11
Tue,Wed 06:00 Saint Louis (STL) 2 10:50 Salt Lake City (SLC)
WN 4503 1-stop Boeing 737 MAX 8 (7M8) 5:50 Effective 2026-02-18 through 2026-03-04
Sat 14:30 Santa Ana (SNA) 19:15 Colorado Springs (COS)
WN 4503 1-stop Boeing 737-700 (Scimitar Winglets) 3:45 Effective 2026-03-07 through 2026-04-04
Sat 18:10 Savannah (SAV) 21:30 Saint Louis (STL) 2
WN 4503 1-stop Boeing 737-700 (Scimitar Winglets) 4:20 Operates only on 2026-01-03
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This flight number is listed as serving the following routes:
Southwest Airlines flight WN 4503: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:

Southwest Airlines WN4503
Effective 2026-01-11 through 2026-01-16
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 3:40, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-01-19 through 2026-01-25
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:40, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-02-01 through 2026-02-06
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 3:40, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-02-09 through 2026-02-15
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:40, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-02-17 through 2026-02-23
Mon
Tue
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 3:40, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4503
Operates only on 2026-03-02
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:40, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-02-12 through 2026-02-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 3:45, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-02-20 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 3:45, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-01-06 through 2026-01-14
Mon
Tue
Wed
Thu
Fri
Sat
Sun
-
Duration: 3:45, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-01-17 through 2026-01-24
Mon
-
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 3:45, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-01-26 through 2026-02-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
-
Duration: 3:45, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-02-07 through 2026-02-14
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
Sun
Duration: 3:45, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-02-18 through 2026-03-04
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:45, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-01-06 through 2026-01-14
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-01-18 through 2026-01-23
Mon
-
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-01-26 through 2026-02-04
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-02-08 through 2026-02-11
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-02-18 through 2026-03-04
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-03-07 through 2026-04-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:15, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-03-05 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 WN4503
Effective 2026-08-08 through 2026-09-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:20, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4503
Operates only on 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:20, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-03-07 through 2026-04-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 0:50, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-08-04 through 2026-09-30
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-08-06 through 2026-09-28
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:15, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-08-09 through 2026-09-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-06-09 through 2026-07-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4503
Operates only on 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-06-06 through 2026-08-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4503
Effective 2026-06-07 through 2026-08-02
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4503
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 WN4503
Effective 2026-06-04 through 2026-08-03
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:35, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN4503
Valid until 2026-01-04
Mon
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Direct Flights:

Southwest Airlines WN4503
Effective 2026-04-12 through 2026-05-17
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:30, non-stop
Boeing 737-700 (Scimitar Winglets)
The flight arrives 1 day after departure.

Direct Flights:

Southwest Airlines WN4503
Operates only on 2026-05-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:30, non-stop
Boeing 737-700 (Scimitar Winglets)
The flight arrives 1 day after departure.

Non-Direct Flights:

Southwest Airlines WN4503
Effective 2026-01-06 through 2026-01-14
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 5:50, 1-stop
Boeing 737 MAX 8 (7M8)

Non-Direct Flights:

Southwest Airlines WN4503
Effective 2026-01-18 through 2026-01-23
Mon
-
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 5:50, 1-stop
Boeing 737 MAX 8 (7M8)

Non-Direct Flights:

Southwest Airlines WN4503
Effective 2026-01-26 through 2026-02-04
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 5:50, 1-stop
Boeing 737 MAX 8 (7M8)

Non-Direct Flights:

Southwest Airlines WN4503
Effective 2026-02-08 through 2026-02-11
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
Duration: 5:50, 1-stop
Boeing 737 MAX 8 (7M8)

Non-Direct Flights:

Southwest Airlines WN4503
Effective 2026-02-18 through 2026-03-04
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 5:50, 1-stop
Boeing 737 MAX 8 (7M8)

Non-Direct Flights:

Southwest Airlines WN4503
Effective 2026-03-07 through 2026-04-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:45, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN4503
Operates only on 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 4:20, 1-stop
Boeing 737-700 (Scimitar Winglets)
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This flight number is listed as serving the following routes:
  • Chicago Midway (MDW) - Saint Louis (STL)
  • Dallas Love Field (DAL) - Kansas City (MCI)
  • Denver (DEN) - Colorado Springs (COS)
  • Las Vegas Harry Reid (LAS) - Salt Lake City (SLC)
  • Louisville (SDF) - Chicago Midway (MDW)
  • Oakland (OAK) - Las Vegas Harry Reid (LAS)
  • Saint Louis (STL) - Las Vegas Harry Reid (LAS)
  • Saint Louis (STL) - Salt Lake City (SLC)
  • Santa Ana (SNA) - Colorado Springs (COS)
  • Santa Ana (SNA) - Denver (DEN)
  • Savannah (SAV) - Chicago Midway (MDW)
  • Savannah (SAV) - Saint Louis (STL)