Southwest Airlines
flight
WN 421:
Multiple routes
FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN421
Valid until 2024-01-02
Mon
-
-
Tue
Wed
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 4:15, non-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN421
Effective 2024-01-08 through 2024-03-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 0:40, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-06-04 through 2024-07-31
Mon
-
-
Tue
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 2:40, non-stop
Boeing 737-800 (73H)
Boeing 737-800 (73H)
Southwest Airlines WN421
Effective 2024-06-06 through 2024-07-04
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-06-08 through 2024-08-03
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
Sun
-
-
Duration: 2:30, non-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN421
Effective 2024-07-08 through 2024-08-02
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Valid until 2024-01-02
Mon
-
-
Tue
Wed
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 1:35, non-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN421
Valid until 2024-01-01
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 2:00, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-01-03 through 2024-01-05
Mon
-
-
Tue
-
-
Wed
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 2:00, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Operates only on 2024-01-07
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 2:00, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Operates only on 2024-07-05
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
Sat
-
-
Sun
-
-
Duration: 1:15, non-stop
Boeing 737-800 (73H)
Boeing 737-800 (73H)
Southwest Airlines WN421
Operates only on 2024-05-26
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 1:55, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-04-11 through 2024-06-03
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 1:55, non-stop
Boeing 737-800 (73H)
Boeing 737-800 (73H)
Southwest Airlines WN421
Effective 2024-04-13 through 2024-06-01
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
Sun
-
-
Duration: 1:55, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-04-14 through 2024-05-19
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 2:00, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Operates only on 2024-06-02
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 2:00, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-08-06 through 2024-10-02
Mon
-
-
Tue
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 3:55, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-08-05 through 2024-09-30
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 3:55, non-stop
Boeing 737-800 (73H)
Boeing 737-800 (73H)
Southwest Airlines WN421
Valid until 2024-01-01
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 1:50, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-01-03 through 2024-01-05
Mon
-
-
Tue
-
-
Wed
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 1:50, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Operates only on 2024-01-07
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 1:50, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-08-10 through 2024-09-28
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
Sun
-
-
Duration: 1:50, non-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN421
Valid until 2024-01-01
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-01-03 through 2024-01-07
Mon
-
-
Tue
-
-
Wed
Thu
Fri
Sat
-
-
Sun
Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-06-09 through 2024-08-04
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 2:35, non-stop
Boeing 737-800 (73H)
Boeing 737-800 (73H)
Southwest Airlines WN421
Valid until 2024-01-01
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 1:20, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-01-03 through 2024-01-07
Mon
-
-
Tue
-
-
Wed
Thu
Fri
Sat
-
-
Sun
Duration: 1:20, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Operates only on 2024-01-06
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
Sun
-
-
Duration: 3:20, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-03-12 through 2024-04-03
Mon
-
-
Tue
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 2:25, non-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN421
Valid until 2024-01-01
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 3:15, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-01-03 through 2024-01-07
Mon
-
-
Tue
-
-
Wed
Thu
Fri
Sat
-
-
Sun
Duration: 3:15, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Operates only on 2024-09-01
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 1:50, non-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN421
Effective 2024-08-11 through 2024-08-25
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 1:50, non-stop
Boeing 737-800 (73H)
Boeing 737-800 (73H)
Southwest Airlines WN421
Effective 2024-09-08 through 2024-09-29
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 1:50, non-stop
Boeing 737-800 (73H)
Boeing 737-800 (73H)
Southwest Airlines WN421
Effective 2024-03-07 through 2024-04-08
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 2:20, non-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN421
Effective 2024-03-12 through 2024-04-03
Mon
-
-
Tue
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 2:25, non-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN421
Effective 2024-03-09 through 2024-04-06
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
Sun
-
-
Duration: 2:25, non-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN421
Effective 2024-03-10 through 2024-04-07
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 2:15, non-stop
Boeing 737-700 (73W)
The flight arrives 1 day after departure.
Boeing 737-700 (73W)
The flight arrives 1 day after departure.
Non-Direct Flights:
Southwest Airlines WN421
Valid until 2024-01-02
Mon
-
-
Tue
Wed
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 6:30, 1-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN421
Valid until 2024-01-01
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 4:35, 1-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-01-03 through 2024-01-05
Mon
-
-
Tue
-
-
Wed
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 4:35, 1-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Operates only on 2024-01-07
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 4:35, 1-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Valid until 2024-01-01
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 4:15, 1-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-01-03 through 2024-01-05
Mon
-
-
Tue
-
-
Wed
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 4:15, 1-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Operates only on 2024-01-07
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 4:10, 1-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Valid until 2024-01-01
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 3:30, 1-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-01-03 through 2024-01-07
Mon
-
-
Tue
-
-
Wed
Thu
Fri
Sat
-
-
Sun
Duration: 3:30, 1-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Valid until 2024-01-01
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 5:30, 1-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-01-03 through 2024-01-07
Mon
-
-
Tue
-
-
Wed
Thu
Fri
Sat
-
-
Sun
Duration: 5:30, 1-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-03-12 through 2024-04-03
Mon
-
-
Tue
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 5:25, 1-stop
Boeing 737-700 (73W)
Boeing 737-700 (73W)
Southwest Airlines WN421
Valid until 2024-01-01
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 7:00, 2-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-01-03 through 2024-01-05
Mon
-
-
Tue
-
-
Wed
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 7:00, 2-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Operates only on 2024-01-07
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 6:55, 2-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Valid until 2024-01-01
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 6:20, 2-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-01-03 through 2024-01-05
Mon
-
-
Tue
-
-
Wed
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 6:20, 2-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Operates only on 2024-01-07
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 6:15, 2-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Valid until 2024-01-01
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 7:40, 2-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-01-03 through 2024-01-07
Mon
-
-
Tue
-
-
Wed
Thu
Fri
Sat
-
-
Sun
Duration: 7:40, 2-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Valid until 2024-01-01
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 9:05, 3-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-01-03 through 2024-01-05
Mon
-
-
Tue
-
-
Wed
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 9:05, 3-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Operates only on 2024-01-07
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 9:00, 3-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Valid until 2024-01-01
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 10:30, 3-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-01-03 through 2024-01-05
Mon
-
-
Tue
-
-
Wed
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 10:30, 3-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Operates only on 2024-01-07
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 10:25, 3-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Valid until 2024-01-01
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 13:15, 4-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Effective 2024-01-03 through 2024-01-05
Mon
-
-
Tue
-
-
Wed
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 13:15, 4-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN421
Operates only on 2024-01-07
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 13:10, 4-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
This flight number is listed as serving the following routes:
- Austin (AUS) - Orlando (MCO)
- Austin (AUS) - Pittsburgh (PIT)
- Boise (BOI) - HARRY REID INTL AIRPORT, Las Vegas (LAS)
- Boise (BOI) - New Orleans (MSY)
- Boise (BOI) - San Diego (SAN)
- Boise (BOI) - San Jose (SJC)
- Denver (DEN) - Boise (BOI)
- Denver (DEN) - HARRY REID INTL AIRPORT, Las Vegas (LAS)
- Denver (DEN) - New Orleans (MSY)
- Denver (DEN) - San Diego (SAN)
- Denver (DEN) - San Jose (SJC)
- HARRY REID INTL AIRPORT, Las Vegas (LAS) - New Orleans (MSY)
- Lihue (LIH) - Honolulu (HNL)
- Long Beach (LGB) - Midway, Chicago (MDW)
- Long Beach (LGB) - Oakland (OAK)
- Midway, Chicago (MDW) - Denver (DEN)
- Norfolk (ORF) - Nashville (BNA)
- Oakland (OAK) - Boise (BOI)
- Orlando (MCO) - Pittsburgh (PIT)
- San Diego (SAN) - HARRY REID INTL AIRPORT, Las Vegas (LAS)
- San Diego (SAN) - New Orleans (MSY)
- San Jose (SJC) - HARRY REID INTL AIRPORT, Las Vegas (LAS)
- San Jose (SJC) - New Orleans (MSY)
- San Jose (SJC) - San Diego (SAN)
- William P. Hobby, Houston (HOU) - Boise (BOI)
- William P. Hobby, Houston (HOU) - Oakland (OAK)