Southwest Airlines flight WN 3855: Multiple routes

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Sat 05:15 Tucson (TUS) 06:35 Las Vegas Harry Reid (LAS) 1
WN 3855 Non-stop Boeing 737-800 (73H) 1:20 Effective 2025-10-04 through 2025-11-01
Sat 06:15 Midway, Chicago (MDW) 09:10 Philadelphia (PHL) E
WN 3855 Non-stop Boeing 737-700 (Scimitar Winglets) 1:55 Effective 2025-11-22 through 2025-11-29
Mon-Wed 06:15 Midway, Chicago (MDW) 09:10 Philadelphia (PHL) E
WN 3855 Non-stop Boeing 737-800 (73H) 1:55 Effective 2025-11-25 through 2025-12-01
Mon,Tue,Fri,Sun 06:15 Midway, Chicago (MDW) 09:10 Philadelphia (PHL) E
WN 3855 Non-stop Boeing 737-800 (73H) 1:55 Effective 2025-12-19 through 2026-01-04
Sat 06:15 Midway, Chicago (MDW) 09:10 Philadelphia (PHL) E
WN 3855 Non-stop Boeing 737-700 (Scimitar Winglets) 1:55 Effective 2025-12-20 through 2026-01-03
Mon,Thu,Fri 07:05 Tucson (TUS) 08:30 Las Vegas Harry Reid (LAS) 1
WN 3855 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Effective 2025-10-02 through 2025-10-31
Sun 07:35 Tucson (TUS) 09:00 Las Vegas Harry Reid (LAS) 1
WN 3855 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Effective 2025-10-05 through 2025-10-26
Mon,Thu,Fri 09:20 Oakland (OAK) 2 10:45 Long Beach (LGB)
WN 3855 Non-stop Boeing 737-700 (73W) 1:25 Effective 2025-08-07 through 2025-09-29
Sun 09:40 Las Vegas Harry Reid (LAS) 1 11:20 San Francisco (SFO) 2
WN 3855 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Effective 2025-10-05 through 2025-10-26
Sun 10:25 Oakland (OAK) 2 11:50 Long Beach (LGB)
WN 3855 Non-stop Boeing 737-700 (73W) 1:25 Effective 2025-08-10 through 2025-08-24
Sun 10:25 Oakland (OAK) 2 11:50 Long Beach (LGB)
WN 3855 Non-stop Boeing 737-700 (73W) 1:25 Effective 2025-09-07 through 2025-09-28
Sat 11:00 Oakland (OAK) 2 12:25 Long Beach (LGB)
WN 3855 Non-stop Boeing 737-800 (73H) 1:25 Effective 2025-08-09 through 2025-09-27
Tue,Wed 12:25 Tucson (TUS) 13:55 Las Vegas Harry Reid (LAS) 1
WN 3855 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Effective 2025-10-07 through 2025-10-29
Sun 12:30 Long Beach (LGB) 15:20 Albuquerque (ABQ)
WN 3855 Non-stop Boeing 737-700 (73W) 1:50 Effective 2025-08-10 through 2025-08-24
Sun 12:30 Long Beach (LGB) 15:20 Albuquerque (ABQ)
WN 3855 Non-stop Boeing 737-700 (73W) 1:50 Effective 2025-09-07 through 2025-09-28
Tue,Wed 14:30 Las Vegas Harry Reid (LAS) 1 15:40 San Diego (SAN) 1
WN 3855 Non-stop Boeing 737-700 (Scimitar Winglets) 1:10 Effective 2025-10-07 through 2025-10-29
Sun 15:55 Albuquerque (ABQ) 19:40 Midway, Chicago (MDW)
WN 3855 Non-stop Boeing 737-700 (73W) 2:45 Effective 2025-08-10 through 2025-08-24
Sun 15:55 Albuquerque (ABQ) 19:40 Midway, Chicago (MDW)
WN 3855 Non-stop Boeing 737-700 (73W) 2:45 Effective 2025-09-07 through 2025-09-28
Tue,Wed 16:30 San Diego (SAN) 1 17:55 San Jose (SJC) B
WN 3855 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Effective 2025-10-07 through 2025-10-29
Tue,Wed 18:25 Oakland (OAK) 2 19:50 Long Beach (LGB)
WN 3855 Non-stop Boeing 737-700 (73W) 1:25 Effective 2025-08-05 through 2025-10-01
Tue,Wed 18:30 San Jose (SJC) B 20:45 Seattle-Tacoma (SEA)
WN 3855 Non-stop Boeing 737-700 (Scimitar Winglets) 2:15 Effective 2025-10-07 through 2025-10-29
Sat 18:45 Saint Louis (STL) 2 22:15 Boston Logan (BOS) B
WN 3855 Non-stop Boeing 737-700 (73W) 2:30 Valid until 2025-05-31
Tue,Wed 19:00 Saint Louis (STL) 2 22:30 Boston Logan (BOS) B
WN 3855 Non-stop Boeing 737 MAX 8 (7M8) 2:30 Valid until 2025-06-04
Sun 19:00 Saint Louis (STL) 2 22:30 Boston Logan (BOS) B
WN 3855 Non-stop Boeing 737-700 (73W) 2:30 Operates only on 2025-05-25
Mon,Thu,Fri 19:40 Saint Louis (STL) 2 23:15 Boston Logan (BOS) B
WN 3855 Non-stop Boeing 737-700 (73W) 2:35 Valid until 2025-06-02
Sun 20:40 Saint Louis (STL) 2 00:10 Boston Logan (BOS) B
WN 3855 Non-stop Boeing 737-800 (73H) 2:30 Valid until 2025-05-18
The flight arrives 1 day after departure.
Sun 20:40 Saint Louis (STL) 2 00:10 Boston Logan (BOS) B
WN 3855 Non-stop Boeing 737-800 (73H) 2:30 Operates only on 2025-06-01
The flight arrives 1 day after departure.
Non-Direct Flights:
Sun 07:35 Tucson (TUS) 11:20 San Francisco (SFO) 2
WN 3855 1-stop Boeing 737-700 (Scimitar Winglets) 3:45 Effective 2025-10-05 through 2025-10-26
Sun 10:25 Oakland (OAK) 2 15:20 Albuquerque (ABQ)
WN 3855 1-stop Boeing 737-700 (73W) 3:55 Effective 2025-08-10 through 2025-08-24
Sun 10:25 Oakland (OAK) 2 15:20 Albuquerque (ABQ)
WN 3855 1-stop Boeing 737-700 (73W) 3:55 Effective 2025-09-07 through 2025-09-28
Tue,Wed 12:25 Tucson (TUS) 15:40 San Diego (SAN) 1
WN 3855 1-stop Boeing 737-700 (Scimitar Winglets) 3:15 Effective 2025-10-07 through 2025-10-29
Sun 12:30 Long Beach (LGB) 19:40 Midway, Chicago (MDW)
WN 3855 1-stop Boeing 737-700 (73W) 5:10 Effective 2025-08-10 through 2025-08-24
Sun 12:30 Long Beach (LGB) 19:40 Midway, Chicago (MDW)
WN 3855 1-stop Boeing 737-700 (73W) 5:10 Effective 2025-09-07 through 2025-09-28
Tue,Wed 14:30 Las Vegas Harry Reid (LAS) 1 17:55 San Jose (SJC) B
WN 3855 1-stop Boeing 737-700 (Scimitar Winglets) 3:25 Effective 2025-10-07 through 2025-10-29
Tue,Wed 16:30 San Diego (SAN) 1 20:45 Seattle-Tacoma (SEA)
WN 3855 1-stop Boeing 737-700 (Scimitar Winglets) 4:15 Effective 2025-10-07 through 2025-10-29
Sun 10:25 Oakland (OAK) 2 19:40 Midway, Chicago (MDW)
WN 3855 2-stop Boeing 737-700 (73W) 7:15 Effective 2025-08-10 through 2025-08-24
Sun 10:25 Oakland (OAK) 2 19:40 Midway, Chicago (MDW)
WN 3855 2-stop Boeing 737-700 (73W) 7:15 Effective 2025-09-07 through 2025-09-28
Tue,Wed 12:25 Tucson (TUS) 17:55 San Jose (SJC) B
WN 3855 2-stop Boeing 737-700 (Scimitar Winglets) 5:30 Effective 2025-10-07 through 2025-10-29
Tue,Wed 14:30 Las Vegas Harry Reid (LAS) 1 20:45 Seattle-Tacoma (SEA)
WN 3855 2-stop Boeing 737-700 (Scimitar Winglets) 6:15 Effective 2025-10-07 through 2025-10-29
Tue,Wed 12:25 Tucson (TUS) 20:45 Seattle-Tacoma (SEA)
WN 3855 3-stop Boeing 737-700 (Scimitar Winglets) 8:20 Effective 2025-10-07 through 2025-10-29
This flight number is listed as serving the following routes:


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Southwest Airlines flight WN 3855: Multiple routes
Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN3855
05:15
Tucson (TUS)

06:35
Las Vegas Harry Reid (LAS) 1
Effective 2025-10-04 through 2025-11-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:20, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3855
06:15
Midway, Chicago (MDW)

09:10
Philadelphia (PHL) E
Effective 2025-11-22 through 2025-11-29
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:55, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3855
06:15
Midway, Chicago (MDW)

09:10
Philadelphia (PHL) E
Effective 2025-11-25 through 2025-12-01
Mon
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:55, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3855
06:15
Midway, Chicago (MDW)

09:10
Philadelphia (PHL) E
Effective 2025-12-19 through 2026-01-04
Mon
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 1:55, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3855
06:15
Midway, Chicago (MDW)

09:10
Philadelphia (PHL) E
Effective 2025-12-20 through 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:55, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3855
07:05
Tucson (TUS)

08:30
Las Vegas Harry Reid (LAS) 1
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3855
07:35
Tucson (TUS)

09:00
Las Vegas Harry Reid (LAS) 1
Effective 2025-10-05 through 2025-10-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3855
09:20
Oakland (OAK) 2

10:45
Long Beach (LGB)
Effective 2025-08-07 through 2025-09-29
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:25, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3855
09:40
Las Vegas Harry Reid (LAS) 1

11:20
San Francisco (SFO) 2
Effective 2025-10-05 through 2025-10-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:40, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3855
10:25
Oakland (OAK) 2

11:50
Long Beach (LGB)
Effective 2025-08-10 through 2025-08-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:25, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3855
10:25
Oakland (OAK) 2

11:50
Long Beach (LGB)
Effective 2025-09-07 through 2025-09-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:25, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3855
11:00
Oakland (OAK) 2

12:25
Long Beach (LGB)
Effective 2025-08-09 through 2025-09-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:25, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3855
12:25
Tucson (TUS)

13:55
Las Vegas Harry Reid (LAS) 1
Effective 2025-10-07 through 2025-10-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:30, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3855
12:30
Long Beach (LGB)

15:20
Albuquerque (ABQ)
Effective 2025-08-10 through 2025-08-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:50, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3855
12:30
Long Beach (LGB)

15:20
Albuquerque (ABQ)
Effective 2025-09-07 through 2025-09-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:50, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3855
14:30
Las Vegas Harry Reid (LAS) 1

15:40
San Diego (SAN) 1
Effective 2025-10-07 through 2025-10-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:10, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3855
15:55
Albuquerque (ABQ)

19:40
Midway, Chicago (MDW)
Effective 2025-08-10 through 2025-08-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:45, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3855
15:55
Albuquerque (ABQ)

19:40
Midway, Chicago (MDW)
Effective 2025-09-07 through 2025-09-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:45, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3855
16:30
San Diego (SAN) 1

17:55
San Jose (SJC) B
Effective 2025-10-07 through 2025-10-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3855
18:25
Oakland (OAK) 2

19:50
Long Beach (LGB)
Effective 2025-08-05 through 2025-10-01
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:25, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3855
18:30
San Jose (SJC) B

20:45
Seattle-Tacoma (SEA)
Effective 2025-10-07 through 2025-10-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3855
18:45
Saint Louis (STL) 2

22:15
Boston Logan (BOS) B
Valid until 2025-05-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:30, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3855
19:00
Saint Louis (STL) 2

22:30
Boston Logan (BOS) B
Valid until 2025-06-04
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:30, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3855
19:00
Saint Louis (STL) 2

22:30
Boston Logan (BOS) B
Operates only on 2025-05-25
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:30, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3855
19:40
Saint Louis (STL) 2

23:15
Boston Logan (BOS) B
Valid until 2025-06-02
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 2:35, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3855
20:40
Saint Louis (STL) 2

00:10(+1)
Boston Logan (BOS) B
Valid until 2025-05-18
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:30, non-stop
Boeing 737-800 (73H)
The flight arrives 1 day after departure.
Southwest Airlines WN3855
20:40
Saint Louis (STL) 2

00:10(+1)
Boston Logan (BOS) B
Operates only on 2025-06-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:30, non-stop
Boeing 737-800 (73H)
The flight arrives 1 day after departure.
Non-Direct Flights:
Southwest Airlines WN3855
07:35
Tucson (TUS)

11:20
San Francisco (SFO) 2
Effective 2025-10-05 through 2025-10-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:45, 1-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3855
10:25
Oakland (OAK) 2

15:20
Albuquerque (ABQ)
Effective 2025-08-10 through 2025-08-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:55, 1-stop
Boeing 737-700 (73W)
Southwest Airlines WN3855
10:25
Oakland (OAK) 2

15:20
Albuquerque (ABQ)
Effective 2025-09-07 through 2025-09-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:55, 1-stop
Boeing 737-700 (73W)
Southwest Airlines WN3855
12:25
Tucson (TUS)

15:40
San Diego (SAN) 1
Effective 2025-10-07 through 2025-10-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:15, 1-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3855
12:30
Long Beach (LGB)

19:40
Midway, Chicago (MDW)
Effective 2025-08-10 through 2025-08-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 5:10, 1-stop
Boeing 737-700 (73W)
Southwest Airlines WN3855
12:30
Long Beach (LGB)

19:40
Midway, Chicago (MDW)
Effective 2025-09-07 through 2025-09-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 5:10, 1-stop
Boeing 737-700 (73W)
Southwest Airlines WN3855
14:30
Las Vegas Harry Reid (LAS) 1

17:55
San Jose (SJC) B
Effective 2025-10-07 through 2025-10-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:25, 1-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3855
16:30
San Diego (SAN) 1

20:45
Seattle-Tacoma (SEA)
Effective 2025-10-07 through 2025-10-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 4:15, 1-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3855
10:25
Oakland (OAK) 2

19:40
Midway, Chicago (MDW)
Effective 2025-08-10 through 2025-08-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 7:15, 2-stop
Boeing 737-700 (73W)
Southwest Airlines WN3855
10:25
Oakland (OAK) 2

19:40
Midway, Chicago (MDW)
Effective 2025-09-07 through 2025-09-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 7:15, 2-stop
Boeing 737-700 (73W)
Southwest Airlines WN3855
12:25
Tucson (TUS)

17:55
San Jose (SJC) B
Effective 2025-10-07 through 2025-10-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 5:30, 2-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3855
14:30
Las Vegas Harry Reid (LAS) 1

20:45
Seattle-Tacoma (SEA)
Effective 2025-10-07 through 2025-10-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 6:15, 2-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3855
12:25
Tucson (TUS)

20:45
Seattle-Tacoma (SEA)
Effective 2025-10-07 through 2025-10-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 8:20, 3-stop
Boeing 737-700 (Scimitar Winglets)
This flight number is listed as serving the following routes:
  • Albuquerque (ABQ) - Midway, Chicago (MDW)
  • Las Vegas Harry Reid (LAS) - San Diego (SAN)
  • Las Vegas Harry Reid (LAS) - San Francisco (SFO)
  • Las Vegas Harry Reid (LAS) - San Jose (SJC)
  • Las Vegas Harry Reid (LAS) - Seattle-Tacoma (SEA)
  • Long Beach (LGB) - Albuquerque (ABQ)
  • Long Beach (LGB) - Midway, Chicago (MDW)
  • Midway, Chicago (MDW) - Philadelphia (PHL)
  • Oakland (OAK) - Albuquerque (ABQ)
  • Oakland (OAK) - Long Beach (LGB)
  • Oakland (OAK) - Midway, Chicago (MDW)
  • Saint Louis (STL) - Boston Logan (BOS)
  • San Diego (SAN) - San Jose (SJC)
  • San Diego (SAN) - Seattle-Tacoma (SEA)
  • San Jose (SJC) - Seattle-Tacoma (SEA)
  • Tucson (TUS) - Las Vegas Harry Reid (LAS)
  • Tucson (TUS) - San Diego (SAN)
  • Tucson (TUS) - San Francisco (SFO)
  • Tucson (TUS) - San Jose (SJC)
  • Tucson (TUS) - Seattle-Tacoma (SEA)
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