Southwest Airlines flight WN 2421: Multiple routes

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FLIGHT SCHEDULE
Direct Flights:
Thu,Fri,Sun 05:20 Little Rock (LIT) 06:35 Saint Louis (STL) 2 WN 2421 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Effective 2026-01-11 through 2026-01-16
Mon,Sun 05:20 Little Rock (LIT) 06:35 Saint Louis (STL) 2 WN 2421 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Effective 2026-01-19 through 2026-01-25
Thu,Fri,Sun 05:20 Little Rock (LIT) 06:35 Saint Louis (STL) 2 WN 2421 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Effective 2026-02-01 through 2026-02-06
Mon,Sat,Sun 05:20 Little Rock (LIT) 06:35 Saint Louis (STL) 2 WN 2421 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Effective 2026-02-09 through 2026-02-15
Mon,Tue,Thu,Sat 05:20 Little Rock (LIT) 06:35 Saint Louis (STL) 2 WN 2421 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Effective 2026-02-17 through 2026-02-23
Mon,Sat 05:20 Little Rock (LIT) 06:35 Saint Louis (STL) 2 WN 2421 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Effective 2026-02-28 through 2026-03-02
Mon,Thu,Fri 05:45 Little Rock (LIT) 07:05 Saint Louis (STL) 2 WN 2421 Non-stop Boeing 737 MAX 8 (7M8) 1:20 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 05:45 Little Rock (LIT) 07:05 Saint Louis (STL) 2 WN 2421 Non-stop Boeing 737 MAX 8 (7M8) 1:20 Effective 2026-02-20 through 2026-03-01
Mon-Fri 06:15 Little Rock (LIT) 07:30 Saint Louis (STL) 2 WN 2421 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Effective 2026-01-06 through 2026-01-14
Tue-Fri,Sun 06:15 Little Rock (LIT) 07:30 Saint Louis (STL) 2 WN 2421 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Effective 2026-01-18 through 2026-01-23
Mon-Fri 06:15 Little Rock (LIT) 07:30 Saint Louis (STL) 2 WN 2421 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Effective 2026-01-26 through 2026-02-04
Tue,Wed,Sun 06:15 Little Rock (LIT) 07:30 Saint Louis (STL) 2 WN 2421 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Effective 2026-02-08 through 2026-02-11
Tue,Wed 06:15 Little Rock (LIT) 07:30 Saint Louis (STL) 2 WN 2421 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Effective 2026-02-18 through 2026-03-04
Sat 06:35 Little Rock (LIT) 08:00 Saint Louis (STL) 2 WN 2421 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Effective 2026-01-10 through 2026-02-07
Mon,Thu,Fri 10:50 Los Angeles (LAX) 1 12:15 Phoenix Sky Harbor (PHX) 4 WN 2421 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Effective 2026-06-04 through 2026-08-03
Sat 10:50 Houston Hobby (HOU) 11:50 San Antonio (SAT) A WN 2421 Non-stop Boeing 737-800 (73H) 1:00 Effective 2026-06-06 through 2026-08-01
Sun 10:50 Oakland (OAK) 2 12:15 Los Angeles (LAX) 1 WN 2421 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Effective 2026-06-07 through 2026-08-02
Tue,Wed 10:50 Austin (AUS) 11:50 Ontario, Los Angeles (ONT) 4 WN 2421 Non-stop Boeing 737-800 (73H) 3:00 Effective 2026-08-04 through 2026-09-30
Tue,Wed 12:20 Phoenix Sky Harbor (PHX) 4 17:20 New Orleans (MSY) WN 2421 Non-stop Boeing 737 MAX 8 (7M8) 3:00 Effective 2026-06-09 through 2026-07-29
Mon,Thu,Fri 12:40 Boston Logan (BOS) B 14:10 Chicago Midway (MDW) WN 2421 Non-stop Boeing 737-800 (73H) 2:30 Effective 2026-08-06 through 2026-09-28
Mon,Thu,Fri 12:55 Phoenix Sky Harbor (PHX) 4 17:55 New Orleans (MSY) WN 2421 Non-stop Boeing 737-700 (Scimitar Winglets) 3:00 Effective 2026-06-04 through 2026-08-03
Sun 12:55 Los Angeles (LAX) 1 14:25 Phoenix Sky Harbor (PHX) 4 WN 2421 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Effective 2026-06-07 through 2026-08-02
Sun 14:10 Kansas City (MCI) 18:10 Fort Lauderdale (FLL) 1 WN 2421 Non-stop Boeing 737-800 (73H) 3:00 Effective 2026-08-09 through 2026-09-27
Sat 14:55 Houston Hobby (HOU) 17:00 Sacramento (SMF) B WN 2421 Non-stop Boeing 737-700 (Scimitar Winglets) 4:05 Effective 2026-04-11 through 2026-05-30
Sat 16:30 Luis Munoz Marin, San Juan (SJU) B 19:50 Orlando (MCO) WN 2421 Non-stop Boeing 737-800 (73H) 3:20 Effective 2026-03-14 through 2026-04-04
Sun 16:35 Luis Munoz Marin, San Juan (SJU) B 19:55 Orlando (MCO) WN 2421 Non-stop Boeing 737 MAX 8 (7M8) 3:20 Effective 2026-03-08 through 2026-04-05
Wed,Thu 17:05 Denver (DEN) 20:30 Birmingham (BHM) WN 2421 Non-stop Boeing 737-700 (73W) 2:25 Valid until 2026-01-01
Sat 17:30 Luis Munoz Marin, San Juan (SJU) B 19:50 Orlando (MCO) WN 2421 Non-stop Boeing 737-800 (73H) 3:20 Operates only on 2026-03-07
Mon,Thu,Fri 17:35 Miami (MIA) 19:40 Saint Louis (STL) 2 WN 2421 Non-stop Boeing 737-800 (73H) 3:05 Effective 2026-03-05 through 2026-04-06
Tue,Wed 18:05 Houston Hobby (HOU) 20:10 Sacramento (SMF) B WN 2421 Non-stop Boeing 737-800 (73H) 4:05 Effective 2026-04-07 through 2026-06-03
Mon,Tue,Fri,Sun 20:55 Denver (DEN) 00:25 Birmingham (BHM) WN 2421 Non-stop Boeing 737-800 (73H) 2:30 Valid until 2026-01-04 The flight arrives 1 day after departure.
Mon,Thu,Fri 21:00 Houston Hobby (HOU) 23:05 Sacramento (SMF) B WN 2421 Non-stop Boeing 737 MAX 8 (7M8) 4:05 Effective 2026-04-09 through 2026-06-01
Mon 21:20 Denver (DEN) 00:50 Birmingham (BHM) WN 2421 Non-stop Boeing 737-800 (73H) 2:30 Operates only on 2026-01-05 The flight arrives 1 day after departure.
Sat 21:25 Denver (DEN) 00:55 Birmingham (BHM) WN 2421 Non-stop Boeing 737-800 (73H) 2:30 Valid until 2026-01-03 The flight arrives 1 day after departure.
Non-Direct Flights:
Mon,Thu,Fri 10:50 Los Angeles (LAX) 1 17:55 New Orleans (MSY) WN 2421 1-stop Boeing 737-700 (Scimitar Winglets) 5:05 Effective 2026-06-04 through 2026-08-03
Sun 10:50 Oakland (OAK) 2 14:25 Phoenix Sky Harbor (PHX) 4 WN 2421 1-stop Boeing 737-700 (Scimitar Winglets) 3:35 Effective 2026-06-07 through 2026-08-02

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This flight number is listed as serving the following routes:

Austin (AUS) - Ontario, Los Angeles (ONT)
Boston Logan (BOS) - Chicago Midway (MDW)
Denver (DEN) - Birmingham (BHM)
Houston Hobby (HOU) - Sacramento (SMF)
Houston Hobby (HOU) - San Antonio (SAT)
Kansas City (MCI) - Fort Lauderdale (FLL)
Little Rock (LIT) - Saint Louis (STL)
Los Angeles (LAX) - New Orleans (MSY)
Los Angeles (LAX) - Phoenix Sky Harbor (PHX)
Luis Munoz Marin, San Juan (SJU) - Orlando (MCO)
Miami (MIA) - Saint Louis (STL)
Oakland (OAK) - Los Angeles (LAX)
Oakland (OAK) - Phoenix Sky Harbor (PHX)
Phoenix Sky Harbor (PHX) - New Orleans (MSY)

All Southwest Airlines flights

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Southwest Airlines flight WN 2421: Multiple routes

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FLIGHT SCHEDULE

Direct Flights:

Southwest Airlines WN2421

05:20

Little Rock (LIT)

06:35

Saint Louis (STL) 2

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2421

05:20

Little Rock (LIT)

06:35

Saint Louis (STL) 2

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

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2421

05:20

Little Rock (LIT)

06:35

Saint Louis (STL) 2

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2421

05:20

Little Rock (LIT)

06:35

Saint Louis (STL) 2

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

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun

Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2421

05:20

Little Rock (LIT)

06:35

Saint Louis (STL) 2

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

Mon

Tue

Wed
-

Thu

Fri
-

Sat

Sun
-

Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2421

05:20

Little Rock (LIT)

06:35

Saint Louis (STL) 2

Effective 2026-02-28 through 2026-03-02

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2421

05:45

Little Rock (LIT)

07:05

Saint Louis (STL) 2

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 1:20, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2421

05:45

Little Rock (LIT)

07:05

Saint Louis (STL) 2

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 1:20, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2421

06:15

Little Rock (LIT)

07:30

Saint Louis (STL) 2

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

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2421

06:15

Little Rock (LIT)

07:30

Saint Louis (STL) 2

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

Mon
-

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2421

06:15

Little Rock (LIT)

07:30

Saint Louis (STL) 2

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

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2421

06:15

Little Rock (LIT)

07:30

Saint Louis (STL) 2

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2421

06:15

Little Rock (LIT)

07:30

Saint Louis (STL) 2

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2421

06:35

Little Rock (LIT)

08:00

Saint Louis (STL) 2

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2421

10:50

Los Angeles (LAX) 1

12:15

Phoenix Sky Harbor (PHX) 4

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN2421

10:50

Houston Hobby (HOU)

11:50

San Antonio (SAT) A

Effective 2026-06-06 through 2026-08-01

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 1:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2421

10:50

Oakland (OAK) 2

12:15

Los Angeles (LAX) 1

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN2421

10:50

Austin (AUS)

11:50

Ontario, Los Angeles (ONT) 4

Effective 2026-08-04 through 2026-09-30

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2421

12:20

Phoenix Sky Harbor (PHX) 4

17:20

New Orleans (MSY)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:00, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2421

12:40

Boston Logan (BOS) B

14:10

Chicago Midway (MDW)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 2:30, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2421

12:55

Phoenix Sky Harbor (PHX) 4

17:55

New Orleans (MSY)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:00, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN2421

12:55

Los Angeles (LAX) 1

14:25

Phoenix Sky Harbor (PHX) 4

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:30, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN2421

14:10

Kansas City (MCI)

18:10

Fort Lauderdale (FLL) 1

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2421

14:55

Houston Hobby (HOU)

17:00

Sacramento (SMF) B

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 4:05, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN2421

16:30

Luis Munoz Marin, San Juan (SJU) B

19:50

Orlando (MCO)

Effective 2026-03-14 through 2026-04-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:20, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2421

16:35

Luis Munoz Marin, San Juan (SJU) B

19:55

Orlando (MCO)

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 WN2421

17:05

Denver (DEN)

20:30

Birmingham (BHM)

Valid until 2026-01-01

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

Duration: 2:25, non-stop
Boeing 737-700 (73W)

Direct Flights:

Southwest Airlines WN2421

17:30

Luis Munoz Marin, San Juan (SJU) B

19:50

Orlando (MCO)

Operates only on 2026-03-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:20, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2421

17:35

Miami (MIA)

19:40

Saint Louis (STL) 2

Effective 2026-03-05 through 2026-04-06

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:05, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2421

18:05

Houston Hobby (HOU)

20:10

Sacramento (SMF) B

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 4:05, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2421

20:55

Denver (DEN)

00:25(+1)

Birmingham (BHM)

Valid until 2026-01-04

Mon

Tue

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 2:30, non-stop
Boeing 737-800 (73H)
The flight arrives 1 day after departure.

Direct Flights:

Southwest Airlines WN2421

21:00

Houston Hobby (HOU)

23:05

Sacramento (SMF) B

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 4:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2421

21:20

Denver (DEN)

00:50(+1)

Birmingham (BHM)

Operates only on 2026-01-05

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:30, non-stop
Boeing 737-800 (73H)
The flight arrives 1 day after departure.

Direct Flights:

Southwest Airlines WN2421

21:25

Denver (DEN)

00:55(+1)

Birmingham (BHM)

Valid until 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:30, non-stop
Boeing 737-800 (73H)
The flight arrives 1 day after departure.

Non-Direct Flights:

Southwest Airlines WN2421

10:50

Los Angeles (LAX) 1

17:55

New Orleans (MSY)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 5:05, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN2421

10:50

Oakland (OAK) 2

14:25

Phoenix Sky Harbor (PHX) 4

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:35, 1-stop
Boeing 737-700 (Scimitar Winglets)

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Parallax here

This flight number is listed as serving the following routes:

Austin (AUS) - Ontario, Los Angeles (ONT)
Boston Logan (BOS) - Chicago Midway (MDW)
Denver (DEN) - Birmingham (BHM)
Houston Hobby (HOU) - Sacramento (SMF)
Houston Hobby (HOU) - San Antonio (SAT)
Kansas City (MCI) - Fort Lauderdale (FLL)
Little Rock (LIT) - Saint Louis (STL)
Los Angeles (LAX) - New Orleans (MSY)
Los Angeles (LAX) - Phoenix Sky Harbor (PHX)
Luis Munoz Marin, San Juan (SJU) - Orlando (MCO)
Miami (MIA) - Saint Louis (STL)
Oakland (OAK) - Los Angeles (LAX)
Oakland (OAK) - Phoenix Sky Harbor (PHX)
Phoenix Sky Harbor (PHX) - New Orleans (MSY)

All Southwest Airlines flights

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