Southwest Airlines flight WN 21: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Sat 05:10 Ontario, Los Angeles (ONT) 4 07:20 Phoenix Sky Harbor (PHX) 4
WN 21 Non-stop Boeing 737 MAX 8 (7M8) 1:10 Valid until 2026-01-03
Sun 06:00 Sacramento (SMF) B 11:20 Dallas Love Field (DAL) 1
WN 21 Non-stop Boeing 737 MAX 8 (7M8) 3:20 Effective 2026-03-08 through 2026-04-05
Sat 06:45 Santa Ana (SNA) 11:50 Dallas Love Field (DAL) 1
WN 21 Non-stop Boeing 737-700 (Scimitar Winglets) 3:05 Effective 2026-04-11 through 2026-05-30
Sat 08:00 Phoenix Sky Harbor (PHX) 4 11:20 Dallas Love Field (DAL) 1
WN 21 Non-stop Boeing 737 MAX 8 (7M8) 2:20 Valid until 2026-01-03
Sat 12:00 Dallas Love Field (DAL) 1 13:15 Houston Hobby (HOU)
WN 21 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Valid until 2026-01-03
Sun 12:00 Dallas Love Field (DAL) 1 13:15 Houston Hobby (HOU)
WN 21 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Effective 2026-03-08 through 2026-04-05
Sat 12:25 Dallas Love Field (DAL) 1 13:40 Houston Hobby (HOU)
WN 21 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Effective 2026-04-11 through 2026-05-30
Sun 12:50 Dallas Love Field (DAL) 1 14:05 Houston Hobby (HOU)
WN 21 Non-stop Boeing 737-800 (73H) 1:15 Effective 2026-04-12 through 2026-05-17
Sun 12:50 Dallas Love Field (DAL) 1 14:05 Houston Hobby (HOU)
WN 21 Non-stop Boeing 737-800 (73H) 1:15 Operates only on 2026-05-31
Sun 14:00 Houston Hobby (HOU) 15:25 Las Vegas Harry Reid (LAS) 1
WN 21 Non-stop Boeing 737 MAX 8 (7M8) 3:25 Effective 2026-03-08 through 2026-04-05
Sun 16:05 Las Vegas Harry Reid (LAS) 1 17:20 Phoenix Sky Harbor (PHX) 4
WN 21 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Effective 2026-03-08 through 2026-04-05
Non-Direct Flights:
Sat 05:10 Ontario, Los Angeles (ONT) 4 11:20 Dallas Love Field (DAL) 1
WN 21 1-stop Boeing 737 MAX 8 (7M8) 4:10 Valid until 2026-01-03
Sun 06:00 Sacramento (SMF) B 13:15 Houston Hobby (HOU)
WN 21 1-stop Boeing 737 MAX 8 (7M8) 5:15 Effective 2026-03-08 through 2026-04-05
Sat 06:45 Santa Ana (SNA) 13:40 Houston Hobby (HOU)
WN 21 1-stop Boeing 737-700 (Scimitar Winglets) 4:55 Effective 2026-04-11 through 2026-05-30
Sat 08:00 Phoenix Sky Harbor (PHX) 4 13:15 Houston Hobby (HOU)
WN 21 1-stop Boeing 737 MAX 8 (7M8) 4:15 Valid until 2026-01-03
Sun 12:00 Dallas Love Field (DAL) 1 15:25 Las Vegas Harry Reid (LAS) 1
WN 21 1-stop Boeing 737 MAX 8 (7M8) 5:25 Effective 2026-03-08 through 2026-04-05
Sun 14:00 Houston Hobby (HOU) 17:20 Phoenix Sky Harbor (PHX) 4
WN 21 1-stop Boeing 737 MAX 8 (7M8) 5:20 Effective 2026-03-08 through 2026-04-05
Sat 05:10 Ontario, Los Angeles (ONT) 4 13:15 Houston Hobby (HOU)
WN 21 2-stop Boeing 737 MAX 8 (7M8) 6:05 Valid until 2026-01-03
Sun 06:00 Sacramento (SMF) B 15:25 Las Vegas Harry Reid (LAS) 1
WN 21 2-stop Boeing 737 MAX 8 (7M8) 9:25 Effective 2026-03-08 through 2026-04-05
Sun 12:00 Dallas Love Field (DAL) 1 17:20 Phoenix Sky Harbor (PHX) 4
WN 21 2-stop Boeing 737 MAX 8 (7M8) 7:20 Effective 2026-03-08 through 2026-04-05
Sun 06:00 Sacramento (SMF) B 17:20 Phoenix Sky Harbor (PHX) 4
WN 21 3-stop Boeing 737 MAX 8 (7M8) 11:20 Effective 2026-03-08 through 2026-04-05
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This flight number is listed as serving the following routes:


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Southwest Airlines flight WN 21: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN21
05:10
Ontario, Los Angeles (ONT) 4

07:20
Phoenix Sky Harbor (PHX) 4
Valid until 2026-01-03
Mon
-
Tue
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Wed
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Thu
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Fri
-
Sat
Sun
-
Duration: 1:10, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN21
06:00
Sacramento (SMF) B

11:20
Dallas Love Field (DAL) 1
Effective 2026-03-08 through 2026-04-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:20, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN21
06:45
Santa Ana (SNA)

11:50
Dallas Love Field (DAL) 1
Effective 2026-04-11 through 2026-05-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:05, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN21
08:00
Phoenix Sky Harbor (PHX) 4

11:20
Dallas Love Field (DAL) 1
Valid until 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:20, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN21
12:00
Dallas Love Field (DAL) 1

13:15
Houston Hobby (HOU)
Valid until 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN21
12:00
Dallas Love Field (DAL) 1

13:15
Houston Hobby (HOU)
Effective 2026-03-08 through 2026-04-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN21
12:25
Dallas Love Field (DAL) 1

13:40
Houston Hobby (HOU)
Effective 2026-04-11 through 2026-05-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN21
12:50
Dallas Love Field (DAL) 1

14:05
Houston Hobby (HOU)
Effective 2026-04-12 through 2026-05-17
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:15, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN21
12:50
Dallas Love Field (DAL) 1

14:05
Houston Hobby (HOU)
Operates only on 2026-05-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:15, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN21
14:00
Houston Hobby (HOU)

15:25
Las Vegas Harry Reid (LAS) 1
Effective 2026-03-08 through 2026-04-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:25, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN21
16:05
Las Vegas Harry Reid (LAS) 1

17:20
Phoenix Sky Harbor (PHX) 4
Effective 2026-03-08 through 2026-04-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
Southwest Airlines WN21
05:10
Ontario, Los Angeles (ONT) 4

11:20
Dallas Love Field (DAL) 1
Valid until 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 4:10, 1-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
Southwest Airlines WN21
06:00
Sacramento (SMF) B

13:15
Houston Hobby (HOU)
Effective 2026-03-08 through 2026-04-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 5:15, 1-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
Southwest Airlines WN21
06:45
Santa Ana (SNA)

13:40
Houston Hobby (HOU)
Effective 2026-04-11 through 2026-05-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 4:55, 1-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN21
08:00
Phoenix Sky Harbor (PHX) 4

13:15
Houston Hobby (HOU)
Valid until 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 4:15, 1-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
Southwest Airlines WN21
12:00
Dallas Love Field (DAL) 1

15:25
Las Vegas Harry Reid (LAS) 1
Effective 2026-03-08 through 2026-04-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 5:25, 1-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
Southwest Airlines WN21
14:00
Houston Hobby (HOU)

17:20
Phoenix Sky Harbor (PHX) 4
Effective 2026-03-08 through 2026-04-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 5:20, 1-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
Southwest Airlines WN21
05:10
Ontario, Los Angeles (ONT) 4

13:15
Houston Hobby (HOU)
Valid until 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 6:05, 2-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
Southwest Airlines WN21
06:00
Sacramento (SMF) B

15:25
Las Vegas Harry Reid (LAS) 1
Effective 2026-03-08 through 2026-04-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 9:25, 2-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
Southwest Airlines WN21
12:00
Dallas Love Field (DAL) 1

17:20
Phoenix Sky Harbor (PHX) 4
Effective 2026-03-08 through 2026-04-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 7:20, 2-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
Southwest Airlines WN21
06:00
Sacramento (SMF) B

17:20
Phoenix Sky Harbor (PHX) 4
Effective 2026-03-08 through 2026-04-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 11:20, 3-stop
Boeing 737 MAX 8 (7M8)
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This flight number is listed as serving the following routes:
  • Dallas Love Field (DAL) - Houston Hobby (HOU)
  • Dallas Love Field (DAL) - Las Vegas Harry Reid (LAS)
  • Houston Hobby (HOU) - Las Vegas Harry Reid (LAS)
  • Houston Hobby (HOU) - Phoenix Sky Harbor (PHX)
  • Las Vegas Harry Reid (LAS) - Phoenix Sky Harbor (PHX)
  • Ontario, Los Angeles (ONT) - Dallas Love Field (DAL)
  • Ontario, Los Angeles (ONT) - Houston Hobby (HOU)
  • Ontario, Los Angeles (ONT) - Phoenix Sky Harbor (PHX)
  • Phoenix Sky Harbor (PHX) - Dallas Love Field (DAL)
  • Sacramento (SMF) - Dallas Love Field (DAL)
  • Sacramento (SMF) - Houston Hobby (HOU)
  • Sacramento (SMF) - Las Vegas Harry Reid (LAS)
  • Sacramento (SMF) - Phoenix Sky Harbor (PHX)
  • Santa Ana (SNA) - Dallas Love Field (DAL)
  • Santa Ana (SNA) - Houston Hobby (HOU)
All Southwest Airlines flights
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