Southwest Airlines flight WN 3421: Multiple routes

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FLIGHT SCHEDULE
Direct Flights:
Sun 08:50 Denver (DEN) 10:15 Sacramento (SMF) B WN 3421 Non-stop Boeing 737 MAX 8 (7M8) 2:25 Effective 2026-08-09 through 2026-09-27
Wed,Thu 09:05 Milwaukee (MKE) 10:40 Kansas City (MCI) WN 3421 Non-stop Boeing 737-700 (73W) 1:35 Valid until 2026-01-01
Sat 15:20 Orlando (MCO) 17:55 San Diego (SAN) 1 WN 3421 Non-stop Boeing 737-800 (73H) 5:35 Effective 2026-01-10 through 2026-02-07
Sat 16:35 Portland (PDX) 18:25 San Jose (SJC) B WN 3421 Non-stop Boeing 737-700 (Scimitar Winglets) 1:50 Operates only on 2026-01-03
Sun 16:55 Dallas Love Field (DAL) 1 20:30 Orlando (MCO) WN 3421 Non-stop Boeing 737-800 (73H) 2:35 Operates only on 2026-05-24
Thu,Fri,Sun 17:10 San Diego (SAN) 1 18:50 San Francisco (SFO) 2 WN 3421 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Effective 2026-01-11 through 2026-01-16
Mon,Sun 17:10 San Diego (SAN) 1 18:50 San Francisco (SFO) 2 WN 3421 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Effective 2026-01-19 through 2026-01-25
Thu,Fri,Sun 17:10 San Diego (SAN) 1 18:50 San Francisco (SFO) 2 WN 3421 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Effective 2026-02-01 through 2026-02-06
Mon,Sun 17:10 San Diego (SAN) 1 18:50 San Francisco (SFO) 2 WN 3421 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Effective 2026-02-09 through 2026-02-15
Mon,Tue,Thu 17:10 San Diego (SAN) 1 18:50 San Francisco (SFO) 2 WN 3421 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Effective 2026-02-17 through 2026-02-23
Mon 17:10 San Diego (SAN) 1 18:50 San Francisco (SFO) 2 WN 3421 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Operates only on 2026-03-02
Mon,Thu,Fri 17:40 Dallas Love Field (DAL) 1 21:15 Orlando (MCO) WN 3421 Non-stop Boeing 737-800 (73H) 2:35 Effective 2026-04-09 through 2026-06-01
Sun 18:10 Dallas Love Field (DAL) 1 21:45 Orlando (MCO) WN 3421 Non-stop Boeing 737-700 (Scimitar Winglets) 2:35 Effective 2026-04-12 through 2026-05-17
Sun 18:10 Dallas Love Field (DAL) 1 21:45 Orlando (MCO) WN 3421 Non-stop Boeing 737-700 (Scimitar Winglets) 2:35 Operates only on 2026-05-31
Mon,Thu,Fri 18:20 San Diego (SAN) 1 20:05 San Francisco (SFO) 2 WN 3421 Non-stop Boeing 737-800 (73H) 1:45 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 18:20 San Diego (SAN) 1 20:05 San Francisco (SFO) 2 WN 3421 Non-stop Boeing 737-800 (73H) 1:45 Effective 2026-02-20 through 2026-03-01
Sat 18:35 Dallas Love Field (DAL) 1 22:10 Orlando (MCO) WN 3421 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-04-11 through 2026-05-30
Sat 18:45 San Diego (SAN) 1 20:25 San Francisco (SFO) 2 WN 3421 Non-stop Boeing 737-800 (73H) 1:40 Effective 2026-01-10 through 2026-02-07
Sat 19:00 San Jose (SJC) B 20:20 Los Angeles (LAX) 1 WN 3421 Non-stop Boeing 737-700 (Scimitar Winglets) 1:20 Operates only on 2026-01-03
Tue,Wed 19:05 Dallas Love Field (DAL) 1 22:40 Orlando (MCO) WN 3421 Non-stop Boeing 737-800 (73H) 2:35 Effective 2026-04-07 through 2026-06-03
Mon,Thu,Fri 19:25 Denver (DEN) 20:55 Sacramento (SMF) B WN 3421 Non-stop Boeing 737-700 (Scimitar Winglets) 2:30 Effective 2026-08-06 through 2026-09-28
Mon-Fri 19:30 San Diego (SAN) 1 21:15 San Francisco (SFO) 2 WN 3421 Non-stop Boeing 737-800 (73H) 1:45 Effective 2026-01-06 through 2026-01-14
Tue-Fri,Sun 19:30 San Diego (SAN) 1 21:15 San Francisco (SFO) 2 WN 3421 Non-stop Boeing 737-800 (73H) 1:45 Effective 2026-01-18 through 2026-01-23
Mon-Fri 19:30 San Diego (SAN) 1 21:15 San Francisco (SFO) 2 WN 3421 Non-stop Boeing 737-800 (73H) 1:45 Effective 2026-01-26 through 2026-02-04
Tue,Wed,Sun 19:30 San Diego (SAN) 1 21:15 San Francisco (SFO) 2 WN 3421 Non-stop Boeing 737-800 (73H) 1:45 Effective 2026-02-08 through 2026-02-11
Tue,Wed 19:30 San Diego (SAN) 1 21:15 San Francisco (SFO) 2 WN 3421 Non-stop Boeing 737-800 (73H) 1:45 Effective 2026-02-18 through 2026-03-04
Mon 19:55 Los Angeles (LAX) 1 22:20 Tucson (TUS) WN 3421 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Operates only on 2026-01-05
Tue,Wed 20:20 Raleigh/Durham (RDU) 1 20:50 Nashville (BNA) WN 3421 Non-stop Boeing 737 MAX 8 (7M8) 1:30 Effective 2026-06-09 through 2026-07-29
Fri,Sun 20:50 Los Angeles (LAX) 1 23:15 Tucson (TUS) WN 3421 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Effective 2026-01-02 through 2026-01-04
Sat 20:55 Los Angeles (LAX) 1 23:20 Tucson (TUS) WN 3421 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Operates only on 2026-01-03
Mon,Thu,Fri 21:15 Raleigh/Durham (RDU) 1 21:45 Nashville (BNA) WN 3421 Non-stop Boeing 737-800 (73H) 1:30 Effective 2026-06-04 through 2026-08-03
Sun 21:15 Raleigh/Durham (RDU) 1 21:45 Nashville (BNA) WN 3421 Non-stop Boeing 737 MAX 8 (7M8) 1:30 Effective 2026-06-07 through 2026-08-02
Non-Direct Flights:
Sat 15:20 Orlando (MCO) 20:25 San Francisco (SFO) 2 WN 3421 1-stop Boeing 737-800 (73H) 8:05 Effective 2026-01-10 through 2026-02-07
Sat 16:35 Portland (PDX) 20:20 Los Angeles (LAX) 1 WN 3421 1-stop Boeing 737-700 (Scimitar Winglets) 3:45 Operates only on 2026-01-03
Sat 19:00 San Jose (SJC) B 23:20 Tucson (TUS) WN 3421 1-stop Boeing 737-700 (Scimitar Winglets) 3:20 Operates only on 2026-01-03
Sat 16:35 Portland (PDX) 23:20 Tucson (TUS) WN 3421 2-stop Boeing 737-700 (Scimitar Winglets) 5:45 Operates only on 2026-01-03

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This flight number is listed as serving the following routes:

Dallas Love Field (DAL) - Orlando (MCO)
Denver (DEN) - Sacramento (SMF)
Los Angeles (LAX) - Tucson (TUS)
Milwaukee (MKE) - Kansas City (MCI)
Orlando (MCO) - San Diego (SAN)
Orlando (MCO) - San Francisco (SFO)
Portland (PDX) - Los Angeles (LAX)
Portland (PDX) - San Jose (SJC)
Portland (PDX) - Tucson (TUS)
Raleigh/Durham (RDU) - Nashville (BNA)
San Diego (SAN) - San Francisco (SFO)
San Jose (SJC) - Los Angeles (LAX)
San Jose (SJC) - Tucson (TUS)

All Southwest Airlines flights

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Southwest Airlines flight WN 3421: Multiple routes

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FLIGHT SCHEDULE

Direct Flights:

Southwest Airlines WN3421

08:50

Denver (DEN)

10:15

Sacramento (SMF) B

Effective 2026-08-09 through 2026-09-27

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:25, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3421

09:05

Milwaukee (MKE)

10:40

Kansas City (MCI)

Valid until 2026-01-01

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

Duration: 1:35, non-stop
Boeing 737-700 (73W)

Direct Flights:

Southwest Airlines WN3421

15:20

Orlando (MCO)

17:55

San Diego (SAN) 1

Effective 2026-01-10 through 2026-02-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 5:35, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3421

16:35

Portland (PDX)

18:25

San Jose (SJC) B

Operates only on 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 1:50, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3421

16:55

Dallas Love Field (DAL) 1

20:30

Orlando (MCO)

Operates only on 2026-05-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:35, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3421

17:10

San Diego (SAN) 1

18:50

San Francisco (SFO) 2

Effective 2026-01-11 through 2026-01-16

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 1:40, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3421

17:10

San Diego (SAN) 1

18:50

San Francisco (SFO) 2

Effective 2026-01-19 through 2026-01-25

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:40, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3421

17:10

San Diego (SAN) 1

18:50

San Francisco (SFO) 2

Effective 2026-02-01 through 2026-02-06

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 1:40, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3421

17:10

San Diego (SAN) 1

18:50

San Francisco (SFO) 2

Effective 2026-02-09 through 2026-02-15

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:40, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3421

17:10

San Diego (SAN) 1

18:50

San Francisco (SFO) 2

Effective 2026-02-17 through 2026-02-23

Mon

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 1:40, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3421

17:10

San Diego (SAN) 1

18:50

San Francisco (SFO) 2

Operates only on 2026-03-02

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:40, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3421

17:40

Dallas Love Field (DAL) 1

21:15

Orlando (MCO)

Effective 2026-04-09 through 2026-06-01

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 2:35, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3421

18:10

Dallas Love Field (DAL) 1

21:45

Orlando (MCO)

Effective 2026-04-12 through 2026-05-17

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3421

18:10

Dallas Love Field (DAL) 1

21:45

Orlando (MCO)

Operates only on 2026-05-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3421

18:20

San Diego (SAN) 1

20:05

San Francisco (SFO) 2

Effective 2026-02-12 through 2026-02-16

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 1:45, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3421

18:20

San Diego (SAN) 1

20:05

San Francisco (SFO) 2

Effective 2026-02-20 through 2026-03-01

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 1:45, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3421

18:35

Dallas Love Field (DAL) 1

22:10

Orlando (MCO)

Effective 2026-04-11 through 2026-05-30

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3421

18:45

San Diego (SAN) 1

20:25

San Francisco (SFO) 2

Effective 2026-01-10 through 2026-02-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 1:40, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3421

19:00

San Jose (SJC) B

20:20

Los Angeles (LAX) 1

Operates only on 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 1:20, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3421

19:05

Dallas Love Field (DAL) 1

22:40

Orlando (MCO)

Effective 2026-04-07 through 2026-06-03

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:35, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3421

19:25

Denver (DEN)

20:55

Sacramento (SMF) B

Effective 2026-08-06 through 2026-09-28

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 2:30, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3421

19:30

San Diego (SAN) 1

21:15

San Francisco (SFO) 2

Effective 2026-01-06 through 2026-01-14

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 1:45, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3421

19:30

San Diego (SAN) 1

21:15

San Francisco (SFO) 2

Effective 2026-01-18 through 2026-01-23

Mon
-

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 1:45, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3421

19:30

San Diego (SAN) 1

21:15

San Francisco (SFO) 2

Effective 2026-01-26 through 2026-02-04

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 1:45, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3421

19:30

San Diego (SAN) 1

21:15

San Francisco (SFO) 2

Effective 2026-02-08 through 2026-02-11

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:45, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3421

19:30

San Diego (SAN) 1

21:15

San Francisco (SFO) 2

Effective 2026-02-18 through 2026-03-04

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:45, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3421

19:55

Los Angeles (LAX) 1

22:20

Tucson (TUS)

Operates only on 2026-01-05

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3421

20:20

Raleigh/Durham (RDU) 1

20:50

Nashville (BNA)

Effective 2026-06-09 through 2026-07-29

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:30, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3421

20:50

Los Angeles (LAX) 1

23:15

Tucson (TUS)

Effective 2026-01-02 through 2026-01-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3421

20:55

Los Angeles (LAX) 1

23:20

Tucson (TUS)

Operates only on 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3421

21:15

Raleigh/Durham (RDU) 1

21:45

Nashville (BNA)

Effective 2026-06-04 through 2026-08-03

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 1:30, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3421

21:15

Raleigh/Durham (RDU) 1

21:45

Nashville (BNA)

Effective 2026-06-07 through 2026-08-02

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:30, non-stop
Boeing 737 MAX 8 (7M8)

Non-Direct Flights:

Southwest Airlines WN3421

15:20

Orlando (MCO)

20:25

San Francisco (SFO) 2

Effective 2026-01-10 through 2026-02-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 8:05, 1-stop
Boeing 737-800 (73H)

Non-Direct Flights:

Southwest Airlines WN3421

16:35

Portland (PDX)

20:20

Los Angeles (LAX) 1

Operates only on 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:45, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN3421

19:00

San Jose (SJC) B

23:20

Tucson (TUS)

Operates only on 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:20, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN3421

16:35

Portland (PDX)

23:20

Tucson (TUS)

Operates only on 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 5:45, 2-stop
Boeing 737-700 (Scimitar Winglets)

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Parallax here

This flight number is listed as serving the following routes:

Dallas Love Field (DAL) - Orlando (MCO)
Denver (DEN) - Sacramento (SMF)
Los Angeles (LAX) - Tucson (TUS)
Milwaukee (MKE) - Kansas City (MCI)
Orlando (MCO) - San Diego (SAN)
Orlando (MCO) - San Francisco (SFO)
Portland (PDX) - Los Angeles (LAX)
Portland (PDX) - San Jose (SJC)
Portland (PDX) - Tucson (TUS)
Raleigh/Durham (RDU) - Nashville (BNA)
San Diego (SAN) - San Francisco (SFO)
San Jose (SJC) - Los Angeles (LAX)
San Jose (SJC) - Tucson (TUS)

All Southwest Airlines flights

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