Southwest Airlines flight WN 4421: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Tue,Wed 06:05 San Antonio (SAT) A 08:10 Saint Louis (STL) 2
WN 4421 Non-stop Boeing 737-700 (Scimitar Winglets) 2:05 Effective 2025-10-07 through 2025-10-29
Sun 07:00 Pensacola (PNS) 08:25 Nashville (BNA)
WN 4421 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Operates only on 2025-11-30
Tue,Wed,Sat 08:35 Las Vegas Harry Reid (LAS) 1 13:05 Honolulu (HNL) 2
WN 4421 Non-stop Boeing 737 MAX 8 (7M8) 6:30 Effective 2025-11-22 through 2025-11-29
Mon 08:35 Las Vegas Harry Reid (LAS) 1 13:05 Honolulu (HNL) 2
WN 4421 Non-stop Boeing 737 MAX 8 (7M8) 6:30 Operates only on 2025-12-01
Mon,Tue,Fri-Sun 08:35 Las Vegas Harry Reid (LAS) 1 13:05 Honolulu (HNL) 2
WN 4421 Non-stop Boeing 737 MAX 8 (7M8) 6:30 Effective 2025-12-19 through 2026-01-04
Tue,Wed 08:45 Saint Louis (STL) 2 12:00 Tampa (TPA)
WN 4421 Non-stop Boeing 737-700 (Scimitar Winglets) 2:15 Effective 2025-10-07 through 2025-10-29
Sat 10:50 Baltimore (BWI) 12:00 Islip (ISP)
WN 4421 Non-stop Boeing 737 MAX 8 (7M8) 1:10 Effective 2025-08-09 through 2025-09-27
Sat 12:55 Islip (ISP) 15:50 Tampa (TPA)
WN 4421 Non-stop Boeing 737 MAX 8 (7M8) 2:55 Effective 2025-08-09 through 2025-09-27
Tue,Wed 16:45 Tampa (TPA) 18:35 Denver (DEN)
WN 4421 Non-stop Boeing 737 MAX 8 (7M8) 3:50 Effective 2025-08-05 through 2025-10-01
Sat 16:50 Tampa (TPA) 18:45 Denver (DEN)
WN 4421 Non-stop Boeing 737 MAX 8 (7M8) 3:55 Effective 2025-08-09 through 2025-09-27
Mon,Thu,Fri,Sun 17:05 San Antonio (SAT) A 19:10 Saint Louis (STL) 2
WN 4421 Non-stop Boeing 737-800 (73H) 2:05 Effective 2025-10-02 through 2025-10-31
Sun 18:40 Tampa (TPA) 20:30 Denver (DEN)
WN 4421 Non-stop Boeing 737 MAX 8 (7M8) 3:50 Operates only on 2025-08-31
Mon,Thu,Fri 18:55 Tampa (TPA) 20:45 Denver (DEN)
WN 4421 Non-stop Boeing 737 MAX 8 (7M8) 3:50 Effective 2025-08-07 through 2025-09-29
Tue,Wed 19:50 Ontario, Los Angeles (ONT) 4 21:10 Oakland (OAK) 2
WN 4421 Non-stop Boeing 737-700 (73W) 1:20 Valid until 2025-06-04
Sun 19:50 Tampa (TPA) 21:40 Denver (DEN)
WN 4421 Non-stop Boeing 737-800 (73H) 3:50 Effective 2025-08-10 through 2025-08-24
Sun 19:50 Tampa (TPA) 21:40 Denver (DEN)
WN 4421 Non-stop Boeing 737-800 (73H) 3:50 Effective 2025-09-07 through 2025-09-28
Sun 20:45 Ontario, Los Angeles (ONT) 4 22:05 Oakland (OAK) 2
WN 4421 Non-stop Boeing 737-800 (73H) 1:20 Valid until 2025-05-18
Sun 20:45 Ontario, Los Angeles (ONT) 4 22:05 Oakland (OAK) 2
WN 4421 Non-stop Boeing 737-800 (73H) 1:20 Operates only on 2025-06-01
Mon,Thu,Fri 21:05 Ontario, Los Angeles (ONT) 4 22:20 Oakland (OAK) 2
WN 4421 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Valid until 2025-06-02
Non-Direct Flights:
Tue,Wed 06:05 San Antonio (SAT) A 12:00 Tampa (TPA)
WN 4421 1-stop Boeing 737-700 (Scimitar Winglets) 4:55 Effective 2025-10-07 through 2025-10-29
Sat 10:50 Baltimore (BWI) 15:50 Tampa (TPA)
WN 4421 1-stop Boeing 737 MAX 8 (7M8) 5:00 Effective 2025-08-09 through 2025-09-27
Sat 12:55 Islip (ISP) 18:45 Denver (DEN)
WN 4421 1-stop Boeing 737 MAX 8 (7M8) 7:50 Effective 2025-08-09 through 2025-09-27
Sat 10:50 Baltimore (BWI) 18:45 Denver (DEN)
WN 4421 2-stop Boeing 737 MAX 8 (7M8) 9:55 Effective 2025-08-09 through 2025-09-27
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This flight number is listed as serving the following routes:


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Southwest Airlines flight WN 4421: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN4421
06:05
San Antonio (SAT) A

08:10
Saint Louis (STL) 2
Effective 2025-10-07 through 2025-10-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:05, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN4421
07:00
Pensacola (PNS)

08:25
Nashville (BNA)
Operates only on 2025-11-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN4421
08:35
Las Vegas Harry Reid (LAS) 1

13:05
Honolulu (HNL) 2
Effective 2025-11-22 through 2025-11-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
Sun
-
Duration: 6:30, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4421
08:35
Las Vegas Harry Reid (LAS) 1

13:05
Honolulu (HNL) 2
Operates only on 2025-12-01
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 6:30, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4421
08:35
Las Vegas Harry Reid (LAS) 1

13:05
Honolulu (HNL) 2
Effective 2025-12-19 through 2026-01-04
Mon
Tue
Wed
-
Thu
-
Fri
Sat
Sun
Duration: 6:30, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4421
08:45
Saint Louis (STL) 2

12:00
Tampa (TPA)
Effective 2025-10-07 through 2025-10-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN4421
10:50
Baltimore (BWI)

12:00
Islip (ISP)
Effective 2025-08-09 through 2025-09-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:10, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4421
12:55
Islip (ISP)

15:50
Tampa (TPA)
Effective 2025-08-09 through 2025-09-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:55, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4421
16:45
Tampa (TPA)

18:35
Denver (DEN)
Effective 2025-08-05 through 2025-10-01
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:50, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4421
16:50
Tampa (TPA)

18:45
Denver (DEN)
Effective 2025-08-09 through 2025-09-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:55, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4421
17:05
San Antonio (SAT) A

19:10
Saint Louis (STL) 2
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 2:05, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN4421
18:40
Tampa (TPA)

20:30
Denver (DEN)
Operates only on 2025-08-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:50, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4421
18:55
Tampa (TPA)

20:45
Denver (DEN)
Effective 2025-08-07 through 2025-09-29
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 3:50, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4421
19:50
Ontario, Los Angeles (ONT) 4

21:10
Oakland (OAK) 2
Valid until 2025-06-04
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:20, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN4421
19:50
Tampa (TPA)

21:40
Denver (DEN)
Effective 2025-08-10 through 2025-08-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:50, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN4421
19:50
Tampa (TPA)

21:40
Denver (DEN)
Effective 2025-09-07 through 2025-09-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:50, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN4421
20:45
Ontario, Los Angeles (ONT) 4

22:05
Oakland (OAK) 2
Valid until 2025-05-18
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:20, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN4421
20:45
Ontario, Los Angeles (ONT) 4

22:05
Oakland (OAK) 2
Operates only on 2025-06-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:20, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN4421
21:05
Ontario, Los Angeles (ONT) 4

22:20
Oakland (OAK) 2
Valid until 2025-06-02
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
Southwest Airlines WN4421
06:05
San Antonio (SAT) A

12:00
Tampa (TPA)
Effective 2025-10-07 through 2025-10-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 4:55, 1-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN4421
10:50
Baltimore (BWI)

15:50
Tampa (TPA)
Effective 2025-08-09 through 2025-09-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 5:00, 1-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4421
12:55
Islip (ISP)

18:45
Denver (DEN)
Effective 2025-08-09 through 2025-09-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 7:50, 1-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN4421
10:50
Baltimore (BWI)

18:45
Denver (DEN)
Effective 2025-08-09 through 2025-09-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 9:55, 2-stop
Boeing 737 MAX 8 (7M8)
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Parallax here
This flight number is listed as serving the following routes:
  • Baltimore (BWI) - Denver (DEN)
  • Baltimore (BWI) - Islip (ISP)
  • Baltimore (BWI) - Tampa (TPA)
  • Islip (ISP) - Denver (DEN)
  • Islip (ISP) - Tampa (TPA)
  • Las Vegas Harry Reid (LAS) - Honolulu (HNL)
  • Ontario, Los Angeles (ONT) - Oakland (OAK)
  • Pensacola (PNS) - Nashville (BNA)
  • Saint Louis (STL) - Tampa (TPA)
  • San Antonio (SAT) - Saint Louis (STL)
  • San Antonio (SAT) - Tampa (TPA)
  • Tampa (TPA) - Denver (DEN)
All Southwest Airlines flights
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