Southwest Airlines flight WN 643: Multiple routes

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FLIGHT SCHEDULE
Direct Flights:
Sat 05:45 Tampa (TPA) 07:10 Austin (AUS) WN 643 Non-stop Boeing 737-800 (73H) 2:25 Effective 2025-06-07 through 2025-08-02
Mon,Thu,Fri 06:05 Tampa (TPA) 07:30 Austin (AUS) WN 643 Non-stop Boeing 737-800 (73H) 2:25 Effective 2025-06-05 through 2025-07-03
Mon,Thu,Fri 06:05 Tampa (TPA) 07:30 Austin (AUS) WN 643 Non-stop Boeing 737-800 (73H) 2:25 Effective 2025-07-07 through 2025-08-04
Sun 06:10 Tampa (TPA) 07:35 Austin (AUS) WN 643 Non-stop Boeing 737-700 (73W) 2:25 Effective 2025-06-08 through 2025-08-03
Fri 06:45 Tampa (TPA) 08:10 Austin (AUS) WN 643 Non-stop Boeing 737-700 (73W) 2:25 Operates only on 2025-07-04
Mon,Thu,Fri 07:10 Phoenix Sky Harbor (PHX) 4 11:25 Austin (AUS) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 2:15 Effective 2025-10-02 through 2025-10-31
Sun 07:30 Phoenix Sky Harbor (PHX) 4 11:45 Austin (AUS) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 2:15 Effective 2025-10-05 through 2025-10-26
Sat 07:45 Phoenix Sky Harbor (PHX) 4 12:00 Austin (AUS) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 2:15 Effective 2025-10-04 through 2025-11-01
Fri 08:45 Austin (AUS) 09:55 Los Angeles (LAX) 1 WN 643 Non-stop Boeing 737-700 (73W) 3:10 Operates only on 2025-07-04
Tue,Wed 09:05 Boston Logan (BOS) B 10:45 Baltimore (BWI) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Effective 2025-11-04 through 2025-11-12
Mon-Thu 09:05 Boston Logan (BOS) B 10:45 Baltimore (BWI) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Effective 2025-11-17 through 2025-11-20
Mon-Fri 09:05 Boston Logan (BOS) B 10:45 Baltimore (BWI) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Effective 2025-12-02 through 2025-12-11
Mon-Wed 09:05 Boston Logan (BOS) B 10:45 Baltimore (BWI) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Effective 2025-12-15 through 2025-12-17
Wed,Thu 09:05 Boston Logan (BOS) B 10:45 Baltimore (BWI) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Effective 2025-12-24 through 2026-01-01
Thu 09:35 Midway, Chicago (MDW) 12:00 Pittsburgh (PIT) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Operates only on 2025-11-27
Fri 10:35 Los Angeles (LAX) 1 11:55 Las Vegas Harry Reid (LAS) 1 WN 643 Non-stop Boeing 737-700 (73W) 1:20 Operates only on 2025-07-04
Sun 11:15 Ontario, Los Angeles (ONT) 4 17:05 Midway, Chicago (MDW) WN 643 Non-stop Boeing 737-800 (73H) 3:50 Operates only on 2025-08-31
Tue,Wed 11:25 Baltimore (BWI) 13:30 Jacksonville (JAX) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 2:05 Effective 2025-11-04 through 2025-11-12
Mon-Thu 11:25 Baltimore (BWI) 13:30 Jacksonville (JAX) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 2:05 Effective 2025-11-17 through 2025-11-20
Mon-Fri 11:25 Baltimore (BWI) 13:30 Jacksonville (JAX) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 2:05 Effective 2025-12-02 through 2025-12-11
Mon-Wed 11:25 Baltimore (BWI) 13:30 Jacksonville (JAX) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 2:05 Effective 2025-12-15 through 2025-12-17
Wed,Thu 11:25 Baltimore (BWI) 13:30 Jacksonville (JAX) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 2:05 Effective 2025-12-24 through 2026-01-01
Tue,Wed 12:35 Tampa (TPA) 14:05 Austin (AUS) WN 643 Non-stop Boeing 737-800 (73H) 2:30 Effective 2025-06-10 through 2025-07-30
Mon,Thu,Fri,Sun 14:15 Baltimore (BWI) 16:20 Jacksonville (JAX) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 2:05 Effective 2025-11-02 through 2025-11-16
Mon,Fri,Sun 14:15 Baltimore (BWI) 16:20 Jacksonville (JAX) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 2:05 Effective 2025-11-21 through 2025-11-28
Fri,Sun 14:15 Baltimore (BWI) 16:20 Jacksonville (JAX) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 2:05 Effective 2025-12-07 through 2025-12-14
Thu 14:15 Baltimore (BWI) 16:20 Jacksonville (JAX) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 2:05 Operates only on 2025-12-18
Mon 14:15 Baltimore (BWI) 16:20 Jacksonville (JAX) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 2:05 Operates only on 2026-01-05
Sat 14:35 Baltimore (BWI) 16:40 Jacksonville (JAX) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 2:05 Effective 2025-11-08 through 2025-11-15
Sat 14:35 Baltimore (BWI) 16:40 Jacksonville (JAX) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 2:05 Effective 2025-12-06 through 2025-12-13
Tue,Wed 14:50 Chicago O'Hare (ORD) 5 16:40 Phoenix Sky Harbor (PHX) 4 WN 643 Non-stop Boeing 737-800 (73H) 3:50 Valid until 2025-06-04
Sat 14:55 Chicago O'Hare (ORD) 5 16:50 Phoenix Sky Harbor (PHX) 4 WN 643 Non-stop Boeing 737-800 (73H) 3:55 Valid until 2025-05-31
Mon,Thu,Fri,Sun 14:55 Chicago O'Hare (ORD) 5 16:50 Phoenix Sky Harbor (PHX) 4 WN 643 Non-stop Boeing 737-700 (73W) 3:55 Valid until 2025-06-02
Mon-Wed 16:00 Baltimore (BWI) 18:10 Jacksonville (JAX) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 2:10 Effective 2025-11-25 through 2025-12-01
Mon,Tue,Fri,Sun 16:00 Baltimore (BWI) 18:10 Jacksonville (JAX) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 2:10 Effective 2025-12-19 through 2026-01-04
Mon,Thu,Fri 17:30 Phoenix Sky Harbor (PHX) 4 18:40 San Diego (SAN) 1 WN 643 Non-stop Boeing 737-700 (73W) 1:10 Valid until 2025-06-02
Sun 17:45 Nashville (BNA) 20:15 Austin (AUS) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 2:30 Operates only on 2025-11-30
Tue,Wed 18:30 Phoenix Sky Harbor (PHX) 4 22:40 Austin (AUS) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 2:10 Effective 2025-10-07 through 2025-10-29
Mon,Thu,Fri 18:50 Las Vegas Harry Reid (LAS) 1 20:00 Burbank (BUR) WN 643 Non-stop Boeing 737-700 (73W) 1:10 Effective 2025-08-07 through 2025-09-29
Sat,Sun 19:00 Las Vegas Harry Reid (LAS) 1 20:10 Burbank (BUR) WN 643 Non-stop Boeing 737-700 (73W) 1:10 Effective 2025-08-09 through 2025-08-30
Sat,Sun 19:00 Las Vegas Harry Reid (LAS) 1 20:10 Burbank (BUR) WN 643 Non-stop Boeing 737-700 (73W) 1:10 Effective 2025-09-06 through 2025-09-28
Mon,Thu,Fri 19:20 San Diego (SAN) 1 00:05 San Antonio (SAT) A WN 643 Non-stop Boeing 737-700 (73W) 2:45 Valid until 2025-06-02 The flight arrives 1 day after departure.
Tue,Wed 19:55 Las Vegas Harry Reid (LAS) 1 21:05 Burbank (BUR) WN 643 Non-stop Boeing 737-700 (73W) 1:10 Effective 2025-08-05 through 2025-10-01
Non-Direct Flights:
Fri 06:45 Tampa (TPA) 09:55 Los Angeles (LAX) 1 WN 643 1-stop Boeing 737-700 (73W) 6:10 Operates only on 2025-07-04
Fri 08:45 Austin (AUS) 11:55 Las Vegas Harry Reid (LAS) 1 WN 643 1-stop Boeing 737-700 (73W) 5:10 Operates only on 2025-07-04
Tue,Wed 09:05 Boston Logan (BOS) B 13:30 Jacksonville (JAX) WN 643 1-stop Boeing 737 MAX 8 (7M8) 4:25 Effective 2025-11-04 through 2025-11-12
Mon-Thu 09:05 Boston Logan (BOS) B 13:30 Jacksonville (JAX) WN 643 1-stop Boeing 737 MAX 8 (7M8) 4:25 Effective 2025-11-17 through 2025-11-20
Mon-Fri 09:05 Boston Logan (BOS) B 13:30 Jacksonville (JAX) WN 643 1-stop Boeing 737 MAX 8 (7M8) 4:25 Effective 2025-12-02 through 2025-12-11
Mon-Wed 09:05 Boston Logan (BOS) B 13:30 Jacksonville (JAX) WN 643 1-stop Boeing 737 MAX 8 (7M8) 4:25 Effective 2025-12-15 through 2025-12-17
Wed,Thu 09:05 Boston Logan (BOS) B 13:30 Jacksonville (JAX) WN 643 1-stop Boeing 737 MAX 8 (7M8) 4:25 Effective 2025-12-24 through 2026-01-01
Mon,Thu,Fri 14:55 Chicago O'Hare (ORD) 5 18:40 San Diego (SAN) 1 WN 643 1-stop Boeing 737-700 (73W) 5:45 Valid until 2025-06-02
Mon,Thu,Fri 17:30 Phoenix Sky Harbor (PHX) 4 00:05 San Antonio (SAT) A WN 643 1-stop Boeing 737-700 (73W) 4:35 Valid until 2025-06-02 The flight arrives 1 day after departure.
Fri 06:45 Tampa (TPA) 11:55 Las Vegas Harry Reid (LAS) 1 WN 643 2-stop Boeing 737-700 (73W) 8:10 Operates only on 2025-07-04
Mon,Thu,Fri 14:55 Chicago O'Hare (ORD) 5 00:05 San Antonio (SAT) A WN 643 2-stop Boeing 737-700 (73W) 9:10 Valid until 2025-06-02 The flight arrives 1 day after departure.

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This flight number is listed as serving the following routes:

Austin (AUS) - Las Vegas Harry Reid (LAS)
Austin (AUS) - Los Angeles (LAX)
Baltimore (BWI) - Jacksonville (JAX)
Boston Logan (BOS) - Baltimore (BWI)
Boston Logan (BOS) - Jacksonville (JAX)
Chicago O'Hare (ORD) - Phoenix Sky Harbor (PHX)
Chicago O'Hare (ORD) - San Antonio (SAT)
Chicago O'Hare (ORD) - San Diego (SAN)
Las Vegas Harry Reid (LAS) - Burbank (BUR)
Los Angeles (LAX) - Las Vegas Harry Reid (LAS)
Midway, Chicago (MDW) - Pittsburgh (PIT)
Nashville (BNA) - Austin (AUS)
Ontario, Los Angeles (ONT) - Midway, Chicago (MDW)
Phoenix Sky Harbor (PHX) - Austin (AUS)
Phoenix Sky Harbor (PHX) - San Antonio (SAT)
Phoenix Sky Harbor (PHX) - San Diego (SAN)
San Diego (SAN) - San Antonio (SAT)
Tampa (TPA) - Austin (AUS)
Tampa (TPA) - Las Vegas Harry Reid (LAS)
Tampa (TPA) - Los Angeles (LAX)

All Southwest Airlines flights

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Southwest Airlines flight WN 643: Multiple routes

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FLIGHT SCHEDULE

Direct Flights:

Southwest Airlines WN643

05:45

Tampa (TPA)

07:10

Austin (AUS)

Effective 2025-06-07 through 2025-08-02

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:25, non-stop
Boeing 737-800 (73H)

Southwest Airlines WN643

06:05

Tampa (TPA)

07:30

Austin (AUS)

Effective 2025-06-05 through 2025-07-03

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 2:25, non-stop
Boeing 737-800 (73H)

Southwest Airlines WN643

06:05

Tampa (TPA)

07:30

Austin (AUS)

Effective 2025-07-07 through 2025-08-04

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 2:25, non-stop
Boeing 737-800 (73H)

Southwest Airlines WN643

06:10

Tampa (TPA)

07:35

Austin (AUS)

Effective 2025-06-08 through 2025-08-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Southwest Airlines WN643

06:45

Tampa (TPA)

08:10

Austin (AUS)

Operates only on 2025-07-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

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

Southwest Airlines WN643

07:10

Phoenix Sky Harbor (PHX) 4

11:25

Austin (AUS)

Effective 2025-10-02 through 2025-10-31

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 2:15, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

07:30

Phoenix Sky Harbor (PHX) 4

11:45

Austin (AUS)

Effective 2025-10-05 through 2025-10-26

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:15, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

07:45

Phoenix Sky Harbor (PHX) 4

12:00

Austin (AUS)

Effective 2025-10-04 through 2025-11-01

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:15, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

08:45

Austin (AUS)

09:55

Los Angeles (LAX) 1

Operates only on 2025-07-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Duration: 3:10, non-stop
Boeing 737-700 (73W)

Southwest Airlines WN643

09:05

Boston Logan (BOS) B

10:45

Baltimore (BWI)

Effective 2025-11-04 through 2025-11-12

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:40, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

09:05

Boston Logan (BOS) B

10:45

Baltimore (BWI)

Effective 2025-11-17 through 2025-11-20

Mon

Tue

Wed

Thu

Fri
-

Sat
-

Sun
-

Duration: 1:40, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

09:05

Boston Logan (BOS) B

10:45

Baltimore (BWI)

Effective 2025-12-02 through 2025-12-11

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 1:40, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

09:05

Boston Logan (BOS) B

10:45

Baltimore (BWI)

Effective 2025-12-15 through 2025-12-17

Mon

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:40, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

09:05

Boston Logan (BOS) B

10:45

Baltimore (BWI)

Effective 2025-12-24 through 2026-01-01

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

Duration: 1:40, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

09:35

Midway, Chicago (MDW)

12:00

Pittsburgh (PIT)

Operates only on 2025-11-27

Mon
-

Tue
-

Wed
-

Thu

Fri
-

Sat
-

Sun
-

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

Southwest Airlines WN643

10:35

Los Angeles (LAX) 1

11:55

Las Vegas Harry Reid (LAS) 1

Operates only on 2025-07-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Duration: 1:20, non-stop
Boeing 737-700 (73W)

Southwest Airlines WN643

11:15

Ontario, Los Angeles (ONT) 4

17:05

Midway, Chicago (MDW)

Operates only on 2025-08-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:50, non-stop
Boeing 737-800 (73H)

Southwest Airlines WN643

11:25

Baltimore (BWI)

13:30

Jacksonville (JAX)

Effective 2025-11-04 through 2025-11-12

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:05, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

11:25

Baltimore (BWI)

13:30

Jacksonville (JAX)

Effective 2025-11-17 through 2025-11-20

Mon

Tue

Wed

Thu

Fri
-

Sat
-

Sun
-

Duration: 2:05, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

11:25

Baltimore (BWI)

13:30

Jacksonville (JAX)

Effective 2025-12-02 through 2025-12-11

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 2:05, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

11:25

Baltimore (BWI)

13:30

Jacksonville (JAX)

Effective 2025-12-15 through 2025-12-17

Mon

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:05, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

11:25

Baltimore (BWI)

13:30

Jacksonville (JAX)

Effective 2025-12-24 through 2026-01-01

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

Duration: 2:05, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

12:35

Tampa (TPA)

14:05

Austin (AUS)

Effective 2025-06-10 through 2025-07-30

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

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

Southwest Airlines WN643

14:15

Baltimore (BWI)

16:20

Jacksonville (JAX)

Effective 2025-11-02 through 2025-11-16

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 2:05, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

14:15

Baltimore (BWI)

16:20

Jacksonville (JAX)

Effective 2025-11-21 through 2025-11-28

Mon

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 2:05, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

14:15

Baltimore (BWI)

16:20

Jacksonville (JAX)

Effective 2025-12-07 through 2025-12-14

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 2:05, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

14:15

Baltimore (BWI)

16:20

Jacksonville (JAX)

Operates only on 2025-12-18

Mon
-

Tue
-

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 2:05, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

14:15

Baltimore (BWI)

16:20

Jacksonville (JAX)

Operates only on 2026-01-05

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:05, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

14:35

Baltimore (BWI)

16:40

Jacksonville (JAX)

Effective 2025-11-08 through 2025-11-15

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:05, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

14:35

Baltimore (BWI)

16:40

Jacksonville (JAX)

Effective 2025-12-06 through 2025-12-13

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:05, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

14:50

Chicago O'Hare (ORD) 5

16:40

Phoenix Sky Harbor (PHX) 4

Valid until 2025-06-04

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:50, non-stop
Boeing 737-800 (73H)

Southwest Airlines WN643

14:55

Chicago O'Hare (ORD) 5

16:50

Phoenix Sky Harbor (PHX) 4

Valid until 2025-05-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:55, non-stop
Boeing 737-800 (73H)

Southwest Airlines WN643

14:55

Chicago O'Hare (ORD) 5

16:50

Phoenix Sky Harbor (PHX) 4

Valid until 2025-06-02

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:55, non-stop
Boeing 737-700 (73W)

Southwest Airlines WN643

16:00

Baltimore (BWI)

18:10

Jacksonville (JAX)

Effective 2025-11-25 through 2025-12-01

Mon

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:10, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

16:00

Baltimore (BWI)

18:10

Jacksonville (JAX)

Effective 2025-12-19 through 2026-01-04

Mon

Tue

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 2:10, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

17:30

Phoenix Sky Harbor (PHX) 4

18:40

San Diego (SAN) 1

Valid until 2025-06-02

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 1:10, non-stop
Boeing 737-700 (73W)

Southwest Airlines WN643

17:45

Nashville (BNA)

20:15

Austin (AUS)

Operates only on 2025-11-30

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:30, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

18:30

Phoenix Sky Harbor (PHX) 4

22:40

Austin (AUS)

Effective 2025-10-07 through 2025-10-29

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:10, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

18:50

Las Vegas Harry Reid (LAS) 1

20:00

Burbank (BUR)

Effective 2025-08-07 through 2025-09-29

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 1:10, non-stop
Boeing 737-700 (73W)

Southwest Airlines WN643

19:00

Las Vegas Harry Reid (LAS) 1

20:10

Burbank (BUR)

Effective 2025-08-09 through 2025-08-30

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun

Duration: 1:10, non-stop
Boeing 737-700 (73W)

Southwest Airlines WN643

19:00

Las Vegas Harry Reid (LAS) 1

20:10

Burbank (BUR)

Effective 2025-09-06 through 2025-09-28

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun

Duration: 1:10, non-stop
Boeing 737-700 (73W)

Southwest Airlines WN643

19:20

San Diego (SAN) 1

00:05(+1)

San Antonio (SAT) A

Valid until 2025-06-02

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 2:45, non-stop
Boeing 737-700 (73W)
The flight arrives 1 day after departure.

Southwest Airlines WN643

19:55

Las Vegas Harry Reid (LAS) 1

21:05

Burbank (BUR)

Effective 2025-08-05 through 2025-10-01

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:10, non-stop
Boeing 737-700 (73W)

Non-Direct Flights:

Southwest Airlines WN643

06:45

Tampa (TPA)

09:55

Los Angeles (LAX) 1

Operates only on 2025-07-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Duration: 6:10, 1-stop
Boeing 737-700 (73W)

Southwest Airlines WN643

08:45

Austin (AUS)

11:55

Las Vegas Harry Reid (LAS) 1

Operates only on 2025-07-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Duration: 5:10, 1-stop
Boeing 737-700 (73W)

Southwest Airlines WN643

09:05

Boston Logan (BOS) B

13:30

Jacksonville (JAX)

Effective 2025-11-04 through 2025-11-12

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 4:25, 1-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

09:05

Boston Logan (BOS) B

13:30

Jacksonville (JAX)

Effective 2025-11-17 through 2025-11-20

Mon

Tue

Wed

Thu

Fri
-

Sat
-

Sun
-

Duration: 4:25, 1-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

09:05

Boston Logan (BOS) B

13:30

Jacksonville (JAX)

Effective 2025-12-02 through 2025-12-11

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 4:25, 1-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

09:05

Boston Logan (BOS) B

13:30

Jacksonville (JAX)

Effective 2025-12-15 through 2025-12-17

Mon

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 4:25, 1-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

09:05

Boston Logan (BOS) B

13:30

Jacksonville (JAX)

Effective 2025-12-24 through 2026-01-01

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

Duration: 4:25, 1-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN643

14:55

Chicago O'Hare (ORD) 5

18:40

San Diego (SAN) 1

Valid until 2025-06-02

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 5:45, 1-stop
Boeing 737-700 (73W)

Southwest Airlines WN643

17:30

Phoenix Sky Harbor (PHX) 4

00:05(+1)

San Antonio (SAT) A

Valid until 2025-06-02

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 4:35, 1-stop
Boeing 737-700 (73W)
The flight arrives 1 day after departure.

Southwest Airlines WN643

06:45

Tampa (TPA)

11:55

Las Vegas Harry Reid (LAS) 1

Operates only on 2025-07-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Duration: 8:10, 2-stop
Boeing 737-700 (73W)

Southwest Airlines WN643

14:55

Chicago O'Hare (ORD) 5

00:05(+1)

San Antonio (SAT) A

Valid until 2025-06-02

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 9:10, 2-stop
Boeing 737-700 (73W)
The flight arrives 1 day after departure.

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This flight number is listed as serving the following routes:

Austin (AUS) - Las Vegas Harry Reid (LAS)
Austin (AUS) - Los Angeles (LAX)
Baltimore (BWI) - Jacksonville (JAX)
Boston Logan (BOS) - Baltimore (BWI)
Boston Logan (BOS) - Jacksonville (JAX)
Chicago O'Hare (ORD) - Phoenix Sky Harbor (PHX)
Chicago O'Hare (ORD) - San Antonio (SAT)
Chicago O'Hare (ORD) - San Diego (SAN)
Las Vegas Harry Reid (LAS) - Burbank (BUR)
Los Angeles (LAX) - Las Vegas Harry Reid (LAS)
Midway, Chicago (MDW) - Pittsburgh (PIT)
Nashville (BNA) - Austin (AUS)
Ontario, Los Angeles (ONT) - Midway, Chicago (MDW)
Phoenix Sky Harbor (PHX) - Austin (AUS)
Phoenix Sky Harbor (PHX) - San Antonio (SAT)
Phoenix Sky Harbor (PHX) - San Diego (SAN)
San Diego (SAN) - San Antonio (SAT)
Tampa (TPA) - Austin (AUS)
Tampa (TPA) - Las Vegas Harry Reid (LAS)
Tampa (TPA) - Los Angeles (LAX)

All Southwest Airlines flights

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