Southwest Airlines
flight
WN 1921:
Multiple routes
FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN1921
Valid until 2025-06-04
Mon
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Tue
Wed
Thu
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Fri
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Sat
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-
Sun
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-
Duration: 2:40, non-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN1921
Effective 2025-11-04 through 2025-11-12
Mon
-
-
Tue
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 2:05, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-11-17 through 2025-11-20
Mon
Tue
Wed
Thu
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 2:05, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-12-02 through 2025-12-11
Mon
Tue
Wed
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 2:05, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-12-15 through 2025-12-17
Mon
Tue
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 2:05, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-12-24 through 2026-01-01
Mon
-
-
Tue
-
-
Wed
Thu
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 2:05, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Valid until 2025-05-18
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 2:40, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN1921
Operates only on 2025-06-01
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 2:40, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN1921
Valid until 2025-06-02
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 2:40, non-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN1921
Effective 2025-11-25 through 2025-12-01
Mon
Tue
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 1:25, non-stop
Boeing 737-800 (73H)
Boeing 737-800 (73H)
Southwest Airlines WN1921
Effective 2025-12-19 through 2026-01-04
Mon
Tue
Wed
-
-
Thu
-
-
Fri
Sat
-
-
Sun
Duration: 1:25, non-stop
Boeing 737-800 (73H)
Boeing 737-800 (73H)
Southwest Airlines WN1921
Operates only on 2025-05-25
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 2:40, non-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN1921
Effective 2025-11-22 through 2025-11-29
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
Sun
-
-
Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-12-20 through 2026-01-03
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
Sun
-
-
Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Valid until 2025-05-31
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
Sun
-
-
Duration: 2:40, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN1921
Effective 2025-08-07 through 2025-09-29
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 3:35, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN1921
Valid until 2025-06-04
Mon
-
-
Tue
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 1:55, non-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN1921
Effective 2025-06-08 through 2025-08-03
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 3:15, non-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN1921
Valid until 2025-06-02
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 1:10, non-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN1921
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 1:00, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Valid until 2025-06-04
Mon
-
-
Tue
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 2:30, non-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN1921
Effective 2025-10-07 through 2025-10-29
Mon
-
-
Tue
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 1:00, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-06-07 through 2025-08-02
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
Sun
-
-
Duration: 2:25, non-stop
Boeing 737-800 (73H)
Boeing 737-800 (73H)
Southwest Airlines WN1921
Effective 2025-08-05 through 2025-10-01
Mon
-
-
Tue
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 3:30, non-stop
Boeing 737-800 (73H)
Boeing 737-800 (73H)
Southwest Airlines WN1921
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 1:55, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-06-05 through 2025-07-03
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 2:25, non-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN1921
Effective 2025-07-07 through 2025-08-04
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 2:25, non-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN1921
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 1:20, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-10-05 through 2025-10-26
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Operates only on 2025-11-27
Mon
-
-
Tue
-
-
Wed
-
-
Thu
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN1921
Effective 2025-06-10 through 2025-07-30
Mon
-
-
Tue
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 2:30, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN1921
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-11-02 through 2025-11-16
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
Duration: 2:05, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-11-21 through 2025-11-28
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
Sat
-
-
Sun
Duration: 2:05, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-12-07 through 2025-12-14
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
Sat
-
-
Sun
Duration: 2:05, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Operates only on 2025-12-18
Mon
-
-
Tue
-
-
Wed
-
-
Thu
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 2:05, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Operates only on 2026-01-05
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 2:05, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-10-04 through 2025-11-01
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
Sun
-
-
Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN1921
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 1:50, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 1:05, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Operates only on 2025-11-30
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN1921
Valid until 2025-06-04
Mon
-
-
Tue
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 5:10, 1-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN1921
Valid until 2025-06-02
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 4:25, 1-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN1921
Valid until 2025-06-04
Mon
-
-
Tue
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 5:00, 1-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN1921
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 3:30, 1-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 3:50, 1-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 3:25, 1-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 3:50, 1-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 3:30, 1-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Valid until 2025-06-04
Mon
-
-
Tue
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 8:15, 2-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN1921
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 5:25, 2-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 5:55, 2-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 5:50, 2-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 5:30, 2-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 7:30, 3-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 8:20, 3-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 7:30, 3-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 9:55, 4-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 10:00, 4-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1921
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 11:35, 5-stop
Boeing 737-700 (Scimitar Winglets)
Boeing 737-700 (Scimitar Winglets)
This flight number is listed as serving the following routes:
- Albuquerque (ABQ) - Houston Hobby (HOU)
- Albuquerque (ABQ) - Oakland (OAK)
- Austin (AUS) - Albuquerque (ABQ)
- Austin (AUS) - Baltimore (BWI)
- Austin (AUS) - Harlingen (HRL)
- Austin (AUS) - Oakland (OAK)
- Baltimore (BWI) - San Antonio (SAT)
- Denver (DEN) - Albuquerque (ABQ)
- Denver (DEN) - Houston Hobby (HOU)
- Houston Hobby (HOU) - Fort Lauderdale (FLL)
- Houston Hobby (HOU) - Kansas City (MCI)
- Houston Hobby (HOU) - Midway, Chicago (MDW)
- Houston Hobby (HOU) - Nashville (BNA)
- Houston Hobby (HOU) - San Antonio (SAT)
- Houston Hobby (HOU) - Tampa (TPA)
- Kansas City (MCI) - Fort Lauderdale (FLL)
- Kansas City (MCI) - Midway, Chicago (MDW)
- Kansas City (MCI) - Nashville (BNA)
- Kansas City (MCI) - Tampa (TPA)
- Midway, Chicago (MDW) - Fort Lauderdale (FLL)
- Midway, Chicago (MDW) - Nashville (BNA)
- Midway, Chicago (MDW) - Saint Louis (STL)
- Midway, Chicago (MDW) - Tampa (TPA)
- Nashville (BNA) - Fort Lauderdale (FLL)
- Nashville (BNA) - Tampa (TPA)
- Phoenix Sky Harbor (PHX) - Los Angeles (LAX)
- San Antonio (SAT) - Fort Lauderdale (FLL)
- San Antonio (SAT) - Kansas City (MCI)
- San Antonio (SAT) - Midway, Chicago (MDW)
- San Antonio (SAT) - Nashville (BNA)
- San Antonio (SAT) - Tampa (TPA)
- Tampa (TPA) - Albuquerque (ABQ)
- Tampa (TPA) - Austin (AUS)
- Tampa (TPA) - Fort Lauderdale (FLL)
- Tampa (TPA) - Harlingen (HRL)
- Tampa (TPA) - Oakland (OAK)