Southwest Airlines flight WN 3857: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Sat 08:25 Midway, Chicago (MDW) 10:40 Ontario, Los Angeles (ONT) 4
WN 3857 Non-stop Boeing 737-700 (Scimitar Winglets) 4:15 Effective 2025-10-04 through 2025-11-01
Sat 11:05 Montrose (MTJ) 12:15 Denver (DEN)
WN 3857 Non-stop Boeing 737-700 (Scimitar Winglets) 1:10 Effective 2025-11-08 through 2025-11-15
Sat 11:05 Montrose (MTJ) 12:15 Denver (DEN)
WN 3857 Non-stop Boeing 737-700 (Scimitar Winglets) 1:10 Effective 2025-12-06 through 2025-12-13
Sat 11:10 El Paso (ELP) 13:35 San Antonio (SAT) A
WN 3857 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Valid until 2025-05-31
Tue,Wed 11:15 Midway, Chicago (MDW) 13:30 Ontario, Los Angeles (ONT) 4
WN 3857 Non-stop Boeing 737 MAX 8 (7M8) 4:15 Effective 2025-10-07 through 2025-10-29
Mon,Thu,Fri,Sun 11:50 Montrose (MTJ) 13:00 Denver (DEN)
WN 3857 Non-stop Boeing 737-700 (Scimitar Winglets) 1:10 Effective 2025-11-02 through 2025-11-16
Mon,Fri,Sun 11:50 Montrose (MTJ) 13:00 Denver (DEN)
WN 3857 Non-stop Boeing 737-700 (Scimitar Winglets) 1:10 Effective 2025-11-21 through 2025-11-28
Fri,Sun 11:50 Montrose (MTJ) 13:00 Denver (DEN)
WN 3857 Non-stop Boeing 737-700 (Scimitar Winglets) 1:10 Effective 2025-12-07 through 2025-12-14
Thu 11:50 Montrose (MTJ) 13:00 Denver (DEN)
WN 3857 Non-stop Boeing 737-700 (Scimitar Winglets) 1:10 Operates only on 2025-12-18
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 Effective 2025-11-22 through 2025-11-29
Sat 12:10 Montrose (MTJ) 13:15 Denver (DEN)
WN 3857 Non-stop Boeing 737-700 (Scimitar Winglets) 1:05 Effective 2025-12-20 through 2026-01-03
Mon-Wed 12:15 Montrose (MTJ) 13:20 Denver (DEN)
WN 3857 Non-stop Boeing 737 MAX 8 (7M8) 1:05 Effective 2025-11-25 through 2025-12-01
Mon,Tue,Fri,Sun 12:15 Montrose (MTJ) 13:20 Denver (DEN)
WN 3857 Non-stop Boeing 737 MAX 8 (7M8) 1:05 Effective 2025-12-19 through 2026-01-04
Tue,Wed 12:30 Tampa (TPA) 14:25 Denver (DEN)
WN 3857 Non-stop Boeing 737-700 (73W) 3:55 Effective 2025-06-10 through 2025-07-30
Fri 12:55 San Antonio (SAT) A 14:15 Denver (DEN)
WN 3857 Non-stop Boeing 737-700 (73W) 2:20 Operates only on 2025-07-04
Mon,Thu,Fri 13:20 Midway, Chicago (MDW) 15:35 Ontario, Los Angeles (ONT) 4
WN 3857 Non-stop Boeing 737-800 (73H) 4:15 Effective 2025-10-02 through 2025-10-31
Sun 13:35 Montrose (MTJ) 14:45 Denver (DEN)
WN 3857 Non-stop Boeing 737-700 (Scimitar Winglets) 1:10 Operates only on 2025-11-30
Sat 14:20 San Antonio (SAT) A 17:55 Orlando (MCO)
WN 3857 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Valid until 2025-05-31
Mon,Thu,Fri 15:45 Tampa (TPA) 17:40 Denver (DEN)
WN 3857 Non-stop Boeing 737 MAX 8 (7M8) 3:55 Effective 2025-06-05 through 2025-07-03
Mon,Thu,Fri 15:45 Tampa (TPA) 17:40 Denver (DEN)
WN 3857 Non-stop Boeing 737 MAX 8 (7M8) 3:55 Effective 2025-07-07 through 2025-08-04
Tue,Wed 16:05 San Antonio (SAT) A 19:40 Orlando (MCO)
WN 3857 Non-stop Boeing 737-700 (73W) 2:35 Valid until 2025-06-04
Sun 16:05 Tampa (TPA) 18:05 Denver (DEN)
WN 3857 Non-stop Boeing 737 MAX 8 (7M8) 4:00 Effective 2025-06-08 through 2025-08-03
Sun 16:15 Midway, Chicago (MDW) 18:30 Ontario, Los Angeles (ONT) 4
WN 3857 Non-stop Boeing 737-800 (73H) 4:15 Effective 2025-10-05 through 2025-10-26
Wed,Thu 16:45 Montrose (MTJ) 17:45 Denver (DEN)
WN 3857 Non-stop Boeing 737-800 (73H) 1:00 Effective 2025-12-24 through 2026-01-01
Sat 16:55 Tampa (TPA) 19:00 Denver (DEN)
WN 3857 Non-stop Boeing 737-800 (73H) 4:05 Effective 2025-06-07 through 2025-08-02
Mon,Thu,Fri 17:20 San Antonio (SAT) A 21:00 Orlando (MCO)
WN 3857 Non-stop Boeing 737 MAX 8 (7M8) 2:40 Valid until 2025-06-02
Sun 18:30 El Paso (ELP) 20:55 San Antonio (SAT) A
WN 3857 Non-stop Boeing 737-700 (73W) 1:25 Operates only on 2025-05-25
Sun 20:10 El Paso (ELP) 22:35 San Antonio (SAT) A
WN 3857 Non-stop Boeing 737-700 (73W) 1:25 Valid until 2025-05-18
Sun 20:10 El Paso (ELP) 22:35 San Antonio (SAT) A
WN 3857 Non-stop Boeing 737-700 (73W) 1:25 Operates only on 2025-06-01
Non-Direct Flights:
Sat 11:10 El Paso (ELP) 17:55 Orlando (MCO)
WN 3857 1-stop Boeing 737 MAX 8 (7M8) 4:45 Valid until 2025-05-31
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This flight number is listed as serving the following routes:


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Southwest Airlines flight WN 3857: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN3857
08:25
Midway, Chicago (MDW)

10:40
Ontario, Los Angeles (ONT) 4
Effective 2025-10-04 through 2025-11-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 4:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3857
11:05
Montrose (MTJ)

12:15
Denver (DEN)
Effective 2025-11-08 through 2025-11-15
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:10, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3857
11:05
Montrose (MTJ)

12:15
Denver (DEN)
Effective 2025-12-06 through 2025-12-13
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:10, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3857
11:10
El Paso (ELP)

13:35
San Antonio (SAT) A
Valid until 2025-05-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3857
11:15
Midway, Chicago (MDW)

13:30
Ontario, Los Angeles (ONT) 4
Effective 2025-10-07 through 2025-10-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 4:15, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3857
11:50
Montrose (MTJ)

13:00
Denver (DEN)
Effective 2025-11-02 through 2025-11-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 1:10, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3857
11:50
Montrose (MTJ)

13:00
Denver (DEN)
Effective 2025-11-21 through 2025-11-28
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 1:10, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3857
11:50
Montrose (MTJ)

13:00
Denver (DEN)
Effective 2025-12-07 through 2025-12-14
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 1:10, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3857
11:50
Montrose (MTJ)

13:00
Denver (DEN)
Operates only on 2025-12-18
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:10, non-stop
Boeing 737-700 (Scimitar Winglets)
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)
Southwest Airlines WN3857
12:10
Montrose (MTJ)

13:15
Denver (DEN)
Effective 2025-11-22 through 2025-11-29
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:05, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3857
12:10
Montrose (MTJ)

13:15
Denver (DEN)
Effective 2025-12-20 through 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:05, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3857
12:15
Montrose (MTJ)

13:20
Denver (DEN)
Effective 2025-11-25 through 2025-12-01
Mon
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:05, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3857
12:15
Montrose (MTJ)

13:20
Denver (DEN)
Effective 2025-12-19 through 2026-01-04
Mon
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 1:05, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3857
12:30
Tampa (TPA)

14:25
Denver (DEN)
Effective 2025-06-10 through 2025-07-30
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:55, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3857
12:55
San Antonio (SAT) A

14:15
Denver (DEN)
Operates only on 2025-07-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 2:20, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3857
13:20
Midway, Chicago (MDW)

15:35
Ontario, Los Angeles (ONT) 4
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 4:15, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3857
13:35
Montrose (MTJ)

14:45
Denver (DEN)
Operates only on 2025-11-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:10, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3857
14:20
San Antonio (SAT) A

17:55
Orlando (MCO)
Valid until 2025-05-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3857
15:45
Tampa (TPA)

17:40
Denver (DEN)
Effective 2025-06-05 through 2025-07-03
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 3:55, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3857
15:45
Tampa (TPA)

17:40
Denver (DEN)
Effective 2025-07-07 through 2025-08-04
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 3:55, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3857
16:05
San Antonio (SAT) A

19:40
Orlando (MCO)
Valid until 2025-06-04
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:35, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3857
16:05
Tampa (TPA)

18:05
Denver (DEN)
Effective 2025-06-08 through 2025-08-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 4:00, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3857
16:15
Midway, Chicago (MDW)

18:30
Ontario, Los Angeles (ONT) 4
Effective 2025-10-05 through 2025-10-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 4:15, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3857
16:45
Montrose (MTJ)

17:45
Denver (DEN)
Effective 2025-12-24 through 2026-01-01
Mon
-
Tue
-
Wed
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:00, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3857
16:55
Tampa (TPA)

19:00
Denver (DEN)
Effective 2025-06-07 through 2025-08-02
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 4:05, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3857
17:20
San Antonio (SAT) A

21:00
Orlando (MCO)
Valid until 2025-06-02
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 2:40, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3857
18:30
El Paso (ELP)

20:55
San Antonio (SAT) A
Operates only on 2025-05-25
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:25, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3857
20:10
El Paso (ELP)

22:35
San Antonio (SAT) A
Valid until 2025-05-18
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:25, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3857
20:10
El Paso (ELP)

22:35
San Antonio (SAT) A
Operates only on 2025-06-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:25, non-stop
Boeing 737-700 (73W)
Non-Direct Flights:
Southwest Airlines WN3857
11:10
El Paso (ELP)

17:55
Orlando (MCO)
Valid until 2025-05-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 4:45, 1-stop
Boeing 737 MAX 8 (7M8)
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This flight number is listed as serving the following routes:
  • El Paso (ELP) - Orlando (MCO)
  • El Paso (ELP) - San Antonio (SAT)
  • Midway, Chicago (MDW) - Ontario, Los Angeles (ONT)
  • Montrose (MTJ) - Denver (DEN)
  • San Antonio (SAT) - Denver (DEN)
  • San Antonio (SAT) - Orlando (MCO)
  • Tampa (TPA) - Denver (DEN)
All Southwest Airlines flights
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