Southwest Airlines
flug
WN 4021:
Multiple routes
FLUGPLAN
Direktflüge:
Southwest Airlines WN4021
Effective 2026-01-06 through 2026-01-14
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Duration: 1:55, non-stop
Boeing 737-800 (73H)
Boeing 737-800 (73H)
Direktflüge:
Southwest Airlines WN4021
Effective 2026-01-18 through 2026-01-23
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Duration: 1:55, non-stop
Boeing 737-800 (73H)
Boeing 737-800 (73H)
Direktflüge:
Southwest Airlines WN4021
Effective 2026-01-26 through 2026-02-04
Mo
Di
Mi
Do
Fr
Sa
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So
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Duration: 1:55, non-stop
Boeing 737-800 (73H)
Boeing 737-800 (73H)
Direktflüge:
Southwest Airlines WN4021
Effective 2026-02-08 through 2026-02-11
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Duration: 1:55, non-stop
Boeing 737-800 (73H)
Boeing 737-800 (73H)
Direktflüge:
Southwest Airlines WN4021
Effective 2026-02-18 through 2026-03-04
Mo
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Mi
Do
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Fr
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Duration: 1:55, non-stop
Boeing 737-800 (73H)
Boeing 737-800 (73H)
Direktflüge:
Southwest Airlines WN4021
Effective 2026-06-09 through 2026-07-29
Mo
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Mi
Do
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Fr
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Duration: 2:30, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Direktflüge:
Southwest Airlines WN4021
Effective 2026-03-05 through 2026-04-06
Mo
Di
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Mi
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Fr
Sa
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Duration: 2:35, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Direktflüge:
Southwest Airlines WN4021
Effective 2026-03-10 through 2026-04-01
Mo
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Di
Mi
Do
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Fr
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Sa
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Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Direktflüge:
Southwest Airlines WN4021
Effective 2026-06-06 through 2026-08-01
Mo
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Di
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Mi
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Do
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Fr
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Sa
So
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Duration: 2:15, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Direktflüge:
Southwest Airlines WN4021
Effective 2026-02-14 through 2026-02-28
Mo
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Di
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Mi
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Do
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Fr
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Sa
So
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Duration: 1:55, non-stop
Boeing 737-800 (73H)
Boeing 737-800 (73H)
Direktflüge:
Southwest Airlines WN4021
Effective 2026-04-12 through 2026-05-17
Mo
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Di
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Mi
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Do
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Fr
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Sa
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Duration: 1:50, non-stop
Boeing 737-800 (73H)
Boeing 737-800 (73H)
Direktflüge:
Southwest Airlines WN4021
Operates only on 2026-05-31
Mo
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Duration: 1:50, non-stop
Boeing 737-800 (73H)
Boeing 737-800 (73H)
Direktflüge:
Southwest Airlines WN4021
Effective 2026-02-12 through 2026-02-16
Mo
Di
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Mi
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Do
Fr
Sa
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So
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Duration: 1:55, non-stop
Boeing 737-800 (73H)
Boeing 737-800 (73H)
Direktflüge:
Southwest Airlines WN4021
Effective 2026-02-20 through 2026-02-22
Mo
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Di
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Mi
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Do
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Sa
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Duration: 1:55, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Direktflüge:
Southwest Airlines WN4021
Effective 2026-02-26 through 2026-03-01
Mo
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Di
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Mi
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Do
Fr
Sa
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Duration: 1:55, non-stop
Boeing 737-800 (73H)
Boeing 737-800 (73H)
Direktflüge:
Southwest Airlines WN4021
Effective 2026-01-10 through 2026-02-07
Mo
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Di
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Mi
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Do
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Fr
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Sa
So
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Duration: 1:55, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Direktflüge:
Southwest Airlines WN4021
Effective 2026-08-09 through 2026-09-27
Mo
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Di
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Mi
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Do
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Fr
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Sa
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So
Duration: 2:35, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Direktflüge:
Southwest Airlines WN4021
Effective 2026-04-07 through 2026-06-03
Mo
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Di
Mi
Do
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Fr
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Sa
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So
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Duration: 1:45, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Direktflüge:
Southwest Airlines WN4021
Effective 2026-04-09 through 2026-06-01
Mo
Di
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Mi
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Do
Fr
Sa
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So
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Duration: 1:45, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Direktflüge:
Southwest Airlines WN4021
Effective 2026-08-04 through 2026-09-30
Mo
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Di
Mi
Do
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Fr
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Sa
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So
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Duration: 2:30, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Direktflüge:
Southwest Airlines WN4021
Effective 2026-08-08 through 2026-09-26
Mo
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Di
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Mi
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Do
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Fr
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Sa
So
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Duration: 2:30, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Direktflüge:
Southwest Airlines WN4021
Effective 2026-08-06 through 2026-09-28
Mo
Di
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Mi
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Do
Fr
Sa
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So
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Duration: 2:35, non-stop
Boeing 737-800 (73H)
Boeing 737-800 (73H)
Direktflüge:
Southwest Airlines WN4021
Effective 2026-06-07 through 2026-08-02
Mo
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Di
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Mi
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Do
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Fr
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Sa
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Duration: 2:20, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
This flight number is listed as serving the following routes:
- Denver (DEN) - Birmingham (BHM)
- Denver (DEN) - Houston Hobby (HOU)
- Denver (DEN) - Milwaukee (MKE)
- Fort Lauderdale (FLL) - Nashville (BNA)
- Manchester (MHT) - Chicago Midway (MDW)
- Reno (RNO) - Phoenix Sky Harbor (PHX)
- San Francisco (SFO) - Phoenix Sky Harbor (PHX)