Southwest Airlines flight WN 4378: Multiple routes

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FLIGHT SCHEDULE
Direct Flights:
Sun 07:45 Midway, Chicago (MDW) 10:35 Baltimore (BWI) WN 4378 Non-stop Boeing 737 MAX 8 (7M8) 1:50 Operates only on 2025-11-30
Sun 18:30 Baltimore (BWI) 21:05 San Diego (SAN) 1 WN 4378 Non-stop Boeing 737 MAX 8 (7M8) 5:35 Effective 2025-05-04 through 2025-05-18
Sun 18:30 Baltimore (BWI) 21:05 San Diego (SAN) 1 WN 4378 Non-stop Boeing 737 MAX 8 (7M8) 5:35 Operates only on 2025-06-01
Mon,Thu,Fri 20:35 Baltimore (BWI) 23:15 San Diego (SAN) 1 WN 4378 Non-stop Boeing 737-700 (73W) 5:40 Valid until 2025-06-02
Daily 20:55 San Diego (SAN) 1 05:00 Baltimore (BWI) WN 4378 Non-stop Boeing 737 MAX 8 (7M8) 5:05 Effective 2025-06-05 through 2025-08-04 The flight arrives 1 day after departure.
Sat 21:20 Sacramento (SMF) B 22:55 Portland (PDX) WN 4378 Non-stop Boeing 737-800 (73H) 1:35 Effective 2025-11-22 through 2025-11-29
Sat 21:20 Sacramento (SMF) B 22:55 Portland (PDX) WN 4378 Non-stop Boeing 737-800 (73H) 1:35 Effective 2025-12-20 through 2026-01-03
Sun 21:45 San Diego (SAN) 1 23:05 Phoenix Sky Harbor (PHX) 4 WN 4378 Non-stop Boeing 737 MAX 8 (7M8) 1:20 Effective 2025-05-04 through 2025-05-18
Sun 21:45 San Diego (SAN) 1 23:05 Phoenix Sky Harbor (PHX) 4 WN 4378 Non-stop Boeing 737 MAX 8 (7M8) 1:20 Operates only on 2025-06-01
Mon-Wed 21:45 Sacramento (SMF) B 23:20 Portland (PDX) WN 4378 Non-stop Boeing 737 MAX 8 (7M8) 1:35 Effective 2025-11-25 through 2025-12-01
Mon,Tue,Fri,Sun 21:45 Sacramento (SMF) B 23:20 Portland (PDX) WN 4378 Non-stop Boeing 737 MAX 8 (7M8) 1:35 Effective 2025-12-19 through 2026-01-04
Non-Direct Flights:
Sun 18:30 Baltimore (BWI) 23:05 Phoenix Sky Harbor (PHX) 4 WN 4378 1-stop Boeing 737 MAX 8 (7M8) 7:35 Effective 2025-05-04 through 2025-05-18
Sun 18:30 Baltimore (BWI) 23:05 Phoenix Sky Harbor (PHX) 4 WN 4378 1-stop Boeing 737 MAX 8 (7M8) 7:35 Operates only on 2025-06-01

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Parallax here -

This flight number is listed as serving the following routes:

Baltimore (BWI) - Phoenix Sky Harbor (PHX)
Baltimore (BWI) - San Diego (SAN)
Midway, Chicago (MDW) - Baltimore (BWI)
Sacramento (SMF) - Portland (PDX)
San Diego (SAN) - Phoenix Sky Harbor (PHX)

All Southwest Airlines flights

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Southwest Airlines flight WN 4378: Multiple routes

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FLIGHT SCHEDULE

Direct Flights:

Southwest Airlines WN4378

07:45

Midway, Chicago (MDW)

10:35

Baltimore (BWI)

Operates only on 2025-11-30

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Southwest Airlines WN4378

18:30

Baltimore (BWI)

21:05

San Diego (SAN) 1

Effective 2025-05-04 through 2025-05-18

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 5:35, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN4378

18:30

Baltimore (BWI)

21:05

San Diego (SAN) 1

Operates only on 2025-06-01

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 5:35, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN4378

20:35

Baltimore (BWI)

23:15

San Diego (SAN) 1

Valid until 2025-06-02

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 5:40, non-stop
Boeing 737-700 (73W)

Southwest Airlines WN4378

20:55

San Diego (SAN) 1

05:00(+1)

Baltimore (BWI)

Effective 2025-06-05 through 2025-08-04

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 5:05, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Southwest Airlines WN4378

21:20

Sacramento (SMF) B

22:55

Portland (PDX)

Effective 2025-11-22 through 2025-11-29

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Southwest Airlines WN4378

21:20

Sacramento (SMF) B

22:55

Portland (PDX)

Effective 2025-12-20 through 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Southwest Airlines WN4378

21:45

San Diego (SAN) 1

23:05

Phoenix Sky Harbor (PHX) 4

Effective 2025-05-04 through 2025-05-18

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Southwest Airlines WN4378

21:45

San Diego (SAN) 1

23:05

Phoenix Sky Harbor (PHX) 4

Operates only on 2025-06-01

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Southwest Airlines WN4378

21:45

Sacramento (SMF) B

23:20

Portland (PDX)

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

Mon

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:35, non-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN4378

21:45

Sacramento (SMF) B

23:20

Portland (PDX)

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

Mon

Tue

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 1:35, non-stop
Boeing 737 MAX 8 (7M8)

Non-Direct Flights:

Southwest Airlines WN4378

18:30

Baltimore (BWI)

23:05

Phoenix Sky Harbor (PHX) 4

Effective 2025-05-04 through 2025-05-18

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 7:35, 1-stop
Boeing 737 MAX 8 (7M8)

Southwest Airlines WN4378

18:30

Baltimore (BWI)

23:05

Phoenix Sky Harbor (PHX) 4

Operates only on 2025-06-01

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 7:35, 1-stop
Boeing 737 MAX 8 (7M8)

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Parallax here -

This flight number is listed as serving the following routes:

Baltimore (BWI) - Phoenix Sky Harbor (PHX)
Baltimore (BWI) - San Diego (SAN)
Midway, Chicago (MDW) - Baltimore (BWI)
Sacramento (SMF) - Portland (PDX)
San Diego (SAN) - Phoenix Sky Harbor (PHX)

All Southwest Airlines flights

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