Southwest Airlines flight WN 643: Multiple routes

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FLIGHT SCHEDULE
Direct Flights:
Sat 07:55 Phoenix Sky Harbor (PHX) 4 09:30 Santa Ana (SNA) WN 643 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-03-14 through 2026-04-04
Mon,Thu,Fri 08:00 Phoenix Sky Harbor (PHX) 4 09:35 Santa Ana (SNA) WN 643 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-03-09 through 2026-04-06
Tue,Wed 08:40 Phoenix Sky Harbor (PHX) 4 10:10 Santa Ana (SNA) WN 643 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Effective 2026-03-10 through 2026-04-01
Sat 08:55 Phoenix Sky Harbor (PHX) 4 09:30 Santa Ana (SNA) WN 643 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Operates only on 2026-03-07
Thu,Fri 09:00 Phoenix Sky Harbor (PHX) 4 09:35 Santa Ana (SNA) WN 643 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-03-05 through 2026-03-06
Wed,Thu 09:05 Boston Logan (BOS) B 10:45 Baltimore (BWI) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Valid until 2026-01-01
Mon,Thu,Fri 09:35 Nashville (BNA) 12:05 Savannah (SAV) WN 643 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 09:35 Nashville (BNA) 12:05 Savannah (SAV) WN 643 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Effective 2026-02-20 through 2026-03-01
Sat,Sun 09:40 Nashville (BNA) 11:50 Greenville/Spartanburg (GSP) WN 643 Non-stop Boeing 737-700 (Scimitar Winglets) 1:10 Effective 2026-04-11 through 2026-05-23
Sat,Sun 09:40 Nashville (BNA) 11:50 Greenville/Spartanburg (GSP) WN 643 Non-stop Boeing 737-700 (Scimitar Winglets) 1:10 Effective 2026-05-30 through 2026-05-31
Thu,Fri,Sun 09:45 Nashville (BNA) 12:15 Savannah (SAV) WN 643 Non-stop Boeing 737-800 (73H) 1:30 Effective 2026-01-11 through 2026-01-16
Mon,Sun 09:45 Nashville (BNA) 12:15 Savannah (SAV) WN 643 Non-stop Boeing 737-800 (73H) 1:30 Effective 2026-01-19 through 2026-01-25
Sun 09:45 Nashville (BNA) 12:15 Savannah (SAV) WN 643 Non-stop Boeing 737-800 (73H) 1:30 Operates only on 2026-02-01
Mon,Thu,Fri 09:45 Nashville (BNA) 12:15 Savannah (SAV) WN 643 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Effective 2026-02-05 through 2026-02-09
Tue,Thu,Sun 09:45 Nashville (BNA) 12:15 Savannah (SAV) WN 643 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Effective 2026-02-15 through 2026-02-19
Mon 09:45 Nashville (BNA) 12:15 Savannah (SAV) WN 643 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Effective 2026-02-23 through 2026-03-02
Mon,Thu,Fri 09:45 Nashville (BNA) 12:00 Greenville/Spartanburg (GSP) WN 643 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Effective 2026-04-09 through 2026-06-01
Tue,Wed 10:00 Nashville (BNA) 12:10 Greenville/Spartanburg (GSP) WN 643 Non-stop Boeing 737-800 (73H) 1:10 Effective 2026-04-07 through 2026-06-03
Sat 10:05 Nashville (BNA) 12:35 Savannah (SAV) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 1:30 Effective 2026-01-10 through 2026-01-31
Sat 10:10 Nashville (BNA) 12:40 Savannah (SAV) WN 643 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Effective 2026-02-14 through 2026-02-28
Sat 10:15 Nashville (BNA) 12:45 Savannah (SAV) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 1:30 Operates only on 2026-02-07
Sun 11:10 Nashville (BNA) 13:20 Greenville/Spartanburg (GSP) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 1:10 Operates only on 2026-05-24
Sun 11:20 Reno (RNO) 12:50 San Diego (SAN) 1 WN 643 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Effective 2026-03-08 through 2026-04-05
Wed,Thu 11:25 Baltimore (BWI) 13:30 Jacksonville (JAX) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 2:05 Valid until 2026-01-01
Sat 12:25 Greenville/Spartanburg (GSP) 14:00 Baltimore (BWI) WN 643 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-04-11 through 2026-05-30
Mon-Fri 12:50 Nashville (BNA) 15:20 Savannah (SAV) WN 643 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Effective 2026-01-06 through 2026-01-14
Tue-Fri,Sun 12:50 Nashville (BNA) 15:20 Savannah (SAV) WN 643 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Effective 2026-01-18 through 2026-01-23
Mon-Fri 12:50 Nashville (BNA) 15:20 Savannah (SAV) WN 643 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Effective 2026-01-26 through 2026-02-04
Tue,Wed,Sun 12:50 Nashville (BNA) 15:20 Savannah (SAV) WN 643 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Effective 2026-02-08 through 2026-02-11
Tue,Wed 12:50 Nashville (BNA) 15:20 Savannah (SAV) WN 643 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Effective 2026-02-18 through 2026-03-04
Sat 13:25 Savannah (SAV) 15:05 Baltimore (BWI) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Effective 2026-01-10 through 2026-02-07
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
Mon,Tue,Fri,Sun 16:00 Baltimore (BWI) 18:10 Jacksonville (JAX) WN 643 Non-stop Boeing 737 MAX 8 (7M8) 2:10 Valid until 2026-01-04
Tue,Wed 20:10 Detroit (DTW) E 20:45 Nashville (BNA) WN 643 Non-stop Boeing 737-800 (73H) 1:35 Effective 2026-06-09 through 2026-07-29
Tue,Wed 20:40 Nashville (BNA) 22:20 Phoenix Sky Harbor (PHX) 4 WN 643 Non-stop Boeing 737 MAX 8 (7M8) 3:40 Effective 2026-08-04 through 2026-09-30
Mon,Thu,Fri 20:40 Nashville (BNA) 22:20 Phoenix Sky Harbor (PHX) 4 WN 643 Non-stop Boeing 737-800 (73H) 3:40 Effective 2026-08-06 through 2026-09-28
Sun 20:50 Nashville (BNA) 22:30 Phoenix Sky Harbor (PHX) 4 WN 643 Non-stop Boeing 737 MAX 8 (7M8) 3:40 Effective 2026-08-09 through 2026-09-27
Tue,Wed 21:35 Nashville (BNA) 23:10 Phoenix Sky Harbor (PHX) 4 WN 643 Non-stop Boeing 737-800 (73H) 3:35 Effective 2026-06-09 through 2026-07-29
Sat 21:55 Nashville (BNA) 23:30 Phoenix Sky Harbor (PHX) 4 WN 643 Non-stop Boeing 737 MAX 8 (7M8) 3:35 Effective 2026-06-06 through 2026-08-01
Mon,Thu,Fri 22:35 Nashville (BNA) 00:10 Phoenix Sky Harbor (PHX) 4 WN 643 Non-stop Boeing 737 MAX 8 (7M8) 3:35 Effective 2026-06-04 through 2026-08-03 The flight arrives 1 day after departure.
Sun 22:40 Nashville (BNA) 00:15 Phoenix Sky Harbor (PHX) 4 WN 643 Non-stop Boeing 737 MAX 8 (7M8) 3:35 Effective 2026-06-07 through 2026-08-02 The flight arrives 1 day after departure.
Non-Direct Flights:
Wed,Thu 09:05 Boston Logan (BOS) B 13:30 Jacksonville (JAX) WN 643 1-stop Boeing 737 MAX 8 (7M8) 4:25 Valid until 2026-01-01
Sat 09:40 Nashville (BNA) 14:00 Baltimore (BWI) WN 643 1-stop Boeing 737-700 (Scimitar Winglets) 3:20 Effective 2026-04-11 through 2026-05-30
Sat 10:05 Nashville (BNA) 15:05 Baltimore (BWI) WN 643 1-stop Boeing 737 MAX 8 (7M8) 4:00 Effective 2026-01-10 through 2026-01-31
Sat 10:15 Nashville (BNA) 15:05 Baltimore (BWI) WN 643 1-stop Boeing 737 MAX 8 (7M8) 3:50 Operates only on 2026-02-07
Tue,Wed 20:10 Detroit (DTW) E 23:10 Phoenix Sky Harbor (PHX) 4 WN 643 1-stop Boeing 737-800 (73H) 6:00 Effective 2026-06-09 through 2026-07-29

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This flight number is listed as serving the following routes:

Baltimore (BWI) - Jacksonville (JAX)
Boston Logan (BOS) - Baltimore (BWI)
Boston Logan (BOS) - Jacksonville (JAX)
Detroit (DTW) - Nashville (BNA)
Detroit (DTW) - Phoenix Sky Harbor (PHX)
Greenville/Spartanburg (GSP) - Baltimore (BWI)
Nashville (BNA) - Baltimore (BWI)
Nashville (BNA) - Greenville/Spartanburg (GSP)
Nashville (BNA) - Phoenix Sky Harbor (PHX)
Nashville (BNA) - Savannah (SAV)
Phoenix Sky Harbor (PHX) - Santa Ana (SNA)
Reno (RNO) - San Diego (SAN)
Savannah (SAV) - Baltimore (BWI)

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

07:55

Phoenix Sky Harbor (PHX) 4

09:30

Santa Ana (SNA)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Direct Flights:

Southwest Airlines WN643

08:00

Phoenix Sky Harbor (PHX) 4

09:35

Santa Ana (SNA)

Effective 2026-03-09 through 2026-04-06

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN643

08:40

Phoenix Sky Harbor (PHX) 4

10:10

Santa Ana (SNA)

Effective 2026-03-10 through 2026-04-01

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN643

08:55

Phoenix Sky Harbor (PHX) 4

09:30

Santa Ana (SNA)

Operates only on 2026-03-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Direct Flights:

Southwest Airlines WN643

09:00

Phoenix Sky Harbor (PHX) 4

09:35

Santa Ana (SNA)

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN643

09:05

Boston Logan (BOS) B

10:45

Baltimore (BWI)

Valid until 2026-01-01

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN643

09:35

Nashville (BNA)

12:05

Savannah (SAV)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN643

09:35

Nashville (BNA)

12:05

Savannah (SAV)

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN643

09:40

Nashville (BNA)

11:50

Greenville/Spartanburg (GSP)

Effective 2026-04-11 through 2026-05-23

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun

Duration: 1:10, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN643

09:40

Nashville (BNA)

11:50

Greenville/Spartanburg (GSP)

Effective 2026-05-30 through 2026-05-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun

Duration: 1:10, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN643

09:45

Nashville (BNA)

12:15

Savannah (SAV)

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN643

09:45

Nashville (BNA)

12:15

Savannah (SAV)

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

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN643

09:45

Nashville (BNA)

12:15

Savannah (SAV)

Operates only on 2026-02-01

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN643

09:45

Nashville (BNA)

12:15

Savannah (SAV)

Effective 2026-02-05 through 2026-02-09

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN643

09:45

Nashville (BNA)

12:15

Savannah (SAV)

Effective 2026-02-15 through 2026-02-19

Mon
-

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN643

09:45

Nashville (BNA)

12:15

Savannah (SAV)

Effective 2026-02-23 through 2026-03-02

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN643

09:45

Nashville (BNA)

12:00

Greenville/Spartanburg (GSP)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN643

10:00

Nashville (BNA)

12:10

Greenville/Spartanburg (GSP)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:10, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN643

10:05

Nashville (BNA)

12:35

Savannah (SAV)

Effective 2026-01-10 through 2026-01-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Direct Flights:

Southwest Airlines WN643

10:10

Nashville (BNA)

12:40

Savannah (SAV)

Effective 2026-02-14 through 2026-02-28

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Direct Flights:

Southwest Airlines WN643

10:15

Nashville (BNA)

12:45

Savannah (SAV)

Operates only on 2026-02-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Direct Flights:

Southwest Airlines WN643

11:10

Nashville (BNA)

13:20

Greenville/Spartanburg (GSP)

Operates only on 2026-05-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:10, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN643

11:20

Reno (RNO)

12:50

San Diego (SAN) 1

Effective 2026-03-08 through 2026-04-05

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN643

11:25

Baltimore (BWI)

13:30

Jacksonville (JAX)

Valid until 2026-01-01

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN643

12:25

Greenville/Spartanburg (GSP)

14:00

Baltimore (BWI)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Direct Flights:

Southwest Airlines WN643

12:50

Nashville (BNA)

15:20

Savannah (SAV)

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

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN643

12:50

Nashville (BNA)

15:20

Savannah (SAV)

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

Mon
-

Tue

Wed

Thu

Fri

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN643

12:50

Nashville (BNA)

15:20

Savannah (SAV)

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

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN643

12:50

Nashville (BNA)

15:20

Savannah (SAV)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN643

12:50

Nashville (BNA)

15:20

Savannah (SAV)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN643

13:25

Savannah (SAV)

15:05

Baltimore (BWI)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Direct Flights:

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)

Direct Flights:

Southwest Airlines WN643

16:00

Baltimore (BWI)

18:10

Jacksonville (JAX)

Valid until 2026-01-04

Mon

Tue

Wed
-

Thu
-

Fri

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN643

20:10

Detroit (DTW) E

20:45

Nashville (BNA)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:35, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN643

20:40

Nashville (BNA)

22:20

Phoenix Sky Harbor (PHX) 4

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:40, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN643

20:40

Nashville (BNA)

22:20

Phoenix Sky Harbor (PHX) 4

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:40, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN643

20:50

Nashville (BNA)

22:30

Phoenix Sky Harbor (PHX) 4

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:40, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN643

21:35

Nashville (BNA)

23:10

Phoenix Sky Harbor (PHX) 4

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:35, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN643

21:55

Nashville (BNA)

23:30

Phoenix Sky Harbor (PHX) 4

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN643

22:35

Nashville (BNA)

00:10(+1)

Phoenix Sky Harbor (PHX) 4

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:35, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Direct Flights:

Southwest Airlines WN643

22:40

Nashville (BNA)

00:15(+1)

Phoenix Sky Harbor (PHX) 4

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:35, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Non-Direct Flights:

Southwest Airlines WN643

09:05

Boston Logan (BOS) B

13:30

Jacksonville (JAX)

Valid until 2026-01-01

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

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

Non-Direct Flights:

Southwest Airlines WN643

09:40

Nashville (BNA)

14:00

Baltimore (BWI)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Non-Direct Flights:

Southwest Airlines WN643

10:05

Nashville (BNA)

15:05

Baltimore (BWI)

Effective 2026-01-10 through 2026-01-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 4:00, 1-stop
Boeing 737 MAX 8 (7M8)

Non-Direct Flights:

Southwest Airlines WN643

10:15

Nashville (BNA)

15:05

Baltimore (BWI)

Operates only on 2026-02-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:50, 1-stop
Boeing 737 MAX 8 (7M8)

Non-Direct Flights:

Southwest Airlines WN643

20:10

Detroit (DTW) E

23:10

Phoenix Sky Harbor (PHX) 4

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 6:00, 1-stop
Boeing 737-800 (73H)

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This flight number is listed as serving the following routes:

Baltimore (BWI) - Jacksonville (JAX)
Boston Logan (BOS) - Baltimore (BWI)
Boston Logan (BOS) - Jacksonville (JAX)
Detroit (DTW) - Nashville (BNA)
Detroit (DTW) - Phoenix Sky Harbor (PHX)
Greenville/Spartanburg (GSP) - Baltimore (BWI)
Nashville (BNA) - Baltimore (BWI)
Nashville (BNA) - Greenville/Spartanburg (GSP)
Nashville (BNA) - Phoenix Sky Harbor (PHX)
Nashville (BNA) - Savannah (SAV)
Phoenix Sky Harbor (PHX) - Santa Ana (SNA)
Reno (RNO) - San Diego (SAN)
Savannah (SAV) - Baltimore (BWI)

All Southwest Airlines flights

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