Southwest Airlines flight WN 3857: Multiple routes

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FLIGHT SCHEDULE
Direct Flights:
Sun 05:00 Saint Louis (STL) 2 08:20 Orlando (MCO) WN 3857 Non-stop Boeing 737-800 (73H) 2:20 Effective 2026-08-09 through 2026-09-27
Sat 05:10 Saint Louis (STL) 2 08:30 Orlando (MCO) WN 3857 Non-stop Boeing 737-800 (73H) 2:20 Effective 2026-08-08 through 2026-09-26
Tue,Wed 06:25 Saint Louis (STL) 2 09:45 Orlando (MCO) WN 3857 Non-stop Boeing 737-700 (Scimitar Winglets) 2:20 Effective 2026-08-04 through 2026-09-30
Sun 11:10 Boston Logan (BOS) B 14:40 Austin (AUS) WN 3857 Non-stop Boeing 737 MAX 8 (7M8) 4:30 Operates only on 2026-05-24
Mon 11:50 Montrose (MTJ) 13:00 Denver (DEN) WN 3857 Non-stop Boeing 737-700 (Scimitar Winglets) 1:10 Operates only on 2026-01-05
Sat 12:10 Montrose (MTJ) 13:15 Denver (DEN) WN 3857 Non-stop Boeing 737-700 (Scimitar Winglets) 1:05 Operates only on 2026-01-03
Mon,Tue,Fri,Sun 12:15 Montrose (MTJ) 13:20 Denver (DEN) WN 3857 Non-stop Boeing 737 MAX 8 (7M8) 1:05 Valid until 2026-01-04
Tue,Wed 13:25 Orlando (MCO) 15:50 Las Vegas Harry Reid (LAS) 1 WN 3857 Non-stop Boeing 737-800 (73H) 5:25 Effective 2026-03-10 through 2026-04-01
Mon,Thu,Fri,Sun 13:35 Boston Logan (BOS) B 17:05 Austin (AUS) WN 3857 Non-stop Boeing 737 MAX 8 (7M8) 4:30 Effective 2026-04-09 through 2026-05-22
Mon,Thu,Fri,Sun 13:35 Boston Logan (BOS) B 17:05 Austin (AUS) WN 3857 Non-stop Boeing 737 MAX 8 (7M8) 4:30 Effective 2026-05-25 through 2026-06-01
Mon,Thu,Fri 14:25 Saint Louis (STL) 2 17:50 Orlando (MCO) WN 3857 Non-stop Boeing 737-700 (Scimitar Winglets) 2:25 Effective 2026-08-06 through 2026-09-28
Tue,Wed 14:30 Boston Logan (BOS) B 18:05 Austin (AUS) WN 3857 Non-stop Boeing 737-800 (73H) 4:35 Effective 2026-04-07 through 2026-06-03
Sun 14:35 Orlando (MCO) 16:55 Las Vegas Harry Reid (LAS) 1 WN 3857 Non-stop Boeing 737 MAX 8 (7M8) 5:20 Effective 2026-03-08 through 2026-04-05
Mon,Thu,Fri 15:40 Orlando (MCO) 18:00 Las Vegas Harry Reid (LAS) 1 WN 3857 Non-stop Boeing 737 MAX 8 (7M8) 5:20 Effective 2026-03-05 through 2026-04-06
Wed,Thu 16:45 Montrose (MTJ) 17:45 Denver (DEN) WN 3857 Non-stop Boeing 737-800 (73H) 1:00 Valid until 2026-01-01
Sun 17:35 Las Vegas Harry Reid (LAS) 1 18:55 Phoenix Sky Harbor (PHX) 4 WN 3857 Non-stop Boeing 737 MAX 8 (7M8) 1:20 Effective 2026-03-08 through 2026-04-05
Sat 19:45 Santa Ana (SNA) 21:05 Phoenix Sky Harbor (PHX) 4 WN 3857 Non-stop Boeing 737-700 (Scimitar Winglets) 1:20 Effective 2026-06-06 through 2026-08-01
Mon,Thu,Fri 20:45 Santa Ana (SNA) 22:05 Phoenix Sky Harbor (PHX) 4 WN 3857 Non-stop Boeing 737 MAX 8 (7M8) 1:20 Effective 2026-06-04 through 2026-08-03
Sun 21:10 Santa Ana (SNA) 22:30 Phoenix Sky Harbor (PHX) 4 WN 3857 Non-stop Boeing 737 MAX 8 (7M8) 1:20 Effective 2026-06-07 through 2026-08-02
Non-Direct Flights:
Sun 14:35 Orlando (MCO) 18:55 Phoenix Sky Harbor (PHX) 4 WN 3857 1-stop Boeing 737 MAX 8 (7M8) 7:20 Effective 2026-03-08 through 2026-04-05

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Parallax here

This flight number is listed as serving the following routes:

Boston Logan (BOS) - Austin (AUS)
Las Vegas Harry Reid (LAS) - Phoenix Sky Harbor (PHX)
Montrose (MTJ) - Denver (DEN)
Orlando (MCO) - Las Vegas Harry Reid (LAS)
Orlando (MCO) - Phoenix Sky Harbor (PHX)
Saint Louis (STL) - Orlando (MCO)
Santa Ana (SNA) - Phoenix Sky Harbor (PHX)

All Southwest Airlines flights

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Southwest Airlines flight WN 3857: Multiple routes

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FLIGHT SCHEDULE

Direct Flights:

Southwest Airlines WN3857

05:00

Saint Louis (STL) 2

08:20

Orlando (MCO)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:20, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3857

05:10

Saint Louis (STL) 2

08:30

Orlando (MCO)

Effective 2026-08-08 through 2026-09-26

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:20, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3857

06:25

Saint Louis (STL) 2

09:45

Orlando (MCO)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:20, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3857

11:10

Boston Logan (BOS) B

14:40

Austin (AUS)

Operates only on 2026-05-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 4:30, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3857

11:50

Montrose (MTJ)

13:00

Denver (DEN)

Operates only on 2026-01-05

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN3857

12:10

Montrose (MTJ)

13:15

Denver (DEN)

Operates only on 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Direct Flights:

Southwest Airlines WN3857

12:15

Montrose (MTJ)

13:20

Denver (DEN)

Valid until 2026-01-04

Mon

Tue

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 1:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3857

13:25

Orlando (MCO)

15:50

Las Vegas Harry Reid (LAS) 1

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 5:25, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3857

13:35

Boston Logan (BOS) B

17:05

Austin (AUS)

Effective 2026-04-09 through 2026-05-22

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 4:30, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3857

13:35

Boston Logan (BOS) B

17:05

Austin (AUS)

Effective 2026-05-25 through 2026-06-01

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 4:30, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3857

14:25

Saint Louis (STL) 2

17:50

Orlando (MCO)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 2:25, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3857

14:30

Boston Logan (BOS) B

18:05

Austin (AUS)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 4:35, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3857

14:35

Orlando (MCO)

16:55

Las Vegas Harry Reid (LAS) 1

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 5:20, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3857

15:40

Orlando (MCO)

18:00

Las Vegas Harry Reid (LAS) 1

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 5:20, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3857

16:45

Montrose (MTJ)

17:45

Denver (DEN)

Valid until 2026-01-01

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN3857

17:35

Las Vegas Harry Reid (LAS) 1

18:55

Phoenix Sky Harbor (PHX) 4

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN3857

19:45

Santa Ana (SNA)

21:05

Phoenix Sky Harbor (PHX) 4

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Direct Flights:

Southwest Airlines WN3857

20:45

Santa Ana (SNA)

22:05

Phoenix Sky Harbor (PHX) 4

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN3857

21:10

Santa Ana (SNA)

22:30

Phoenix Sky Harbor (PHX) 4

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Non-Direct Flights:

Southwest Airlines WN3857

14:35

Orlando (MCO)

18:55

Phoenix Sky Harbor (PHX) 4

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

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Parallax here

This flight number is listed as serving the following routes:

Boston Logan (BOS) - Austin (AUS)
Las Vegas Harry Reid (LAS) - Phoenix Sky Harbor (PHX)
Montrose (MTJ) - Denver (DEN)
Orlando (MCO) - Las Vegas Harry Reid (LAS)
Orlando (MCO) - Phoenix Sky Harbor (PHX)
Saint Louis (STL) - Orlando (MCO)
Santa Ana (SNA) - Phoenix Sky Harbor (PHX)

All Southwest Airlines flights

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