Southwest Airlines flight WN 3640: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Sun 05:35 San Francisco (SFO) 2 09:00 Denver (DEN)
WN 3640 Non-stop Boeing 737 MAX 8 (7M8) 2:25 Effective 2026-06-07 through 2026-08-02
Tue,Wed 13:55 Omaha (OMA) 14:40 Phoenix Sky Harbor (PHX) 4
WN 3640 Non-stop Boeing 737-800 (73H) 2:45 Effective 2026-04-07 through 2026-06-03
Mon,Thu,Fri 15:35 Omaha (OMA) 16:20 Phoenix Sky Harbor (PHX) 4
WN 3640 Non-stop Boeing 737-700 (Scimitar Winglets) 2:45 Effective 2026-04-09 through 2026-06-01
Thu,Fri,Sun 16:30 Sacramento (SMF) B 17:55 Las Vegas Harry Reid (LAS) 1
WN 3640 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Effective 2026-01-11 through 2026-01-16
Mon,Sun 16:30 Sacramento (SMF) B 17:55 Las Vegas Harry Reid (LAS) 1
WN 3640 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Effective 2026-01-19 through 2026-01-25
Thu,Fri,Sun 16:30 Sacramento (SMF) B 17:55 Las Vegas Harry Reid (LAS) 1
WN 3640 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Effective 2026-02-01 through 2026-02-06
Mon,Sun 16:30 Sacramento (SMF) B 17:55 Las Vegas Harry Reid (LAS) 1
WN 3640 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Effective 2026-02-09 through 2026-02-15
Mon,Tue,Thu 16:30 Sacramento (SMF) B 17:55 Las Vegas Harry Reid (LAS) 1
WN 3640 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Effective 2026-02-17 through 2026-02-23
Mon 16:30 Sacramento (SMF) B 17:55 Las Vegas Harry Reid (LAS) 1
WN 3640 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Operates only on 2026-03-02
Mon,Thu,Fri 16:40 Sacramento (SMF) B 18:05 Las Vegas Harry Reid (LAS) 1
WN 3640 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Effective 2026-02-12 through 2026-02-16
Sat 16:40 Sacramento (SMF) B 18:05 Las Vegas Harry Reid (LAS) 1
WN 3640 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Effective 2026-02-14 through 2026-02-28
Thu,Fri,Sun 16:40 Sacramento (SMF) B 18:05 Las Vegas Harry Reid (LAS) 1
WN 3640 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Effective 2026-02-20 through 2026-03-01
Sat 17:30 Omaha (OMA) 18:15 Phoenix Sky Harbor (PHX) 4
WN 3640 Non-stop Boeing 737 MAX 8 (7M8) 2:45 Effective 2026-04-11 through 2026-05-30
Mon,Thu,Fri 18:30 San Jose (SJC) B 19:50 Santa Ana (SNA)
WN 3640 Non-stop Boeing 737 MAX 8 (7M8) 1:20 Effective 2026-08-06 through 2026-09-28
Thu,Fri,Sun 18:40 Las Vegas Harry Reid (LAS) 1 23:45 Saint Louis (STL) 2
WN 3640 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Effective 2026-01-11 through 2026-01-16
Mon,Sun 18:40 Las Vegas Harry Reid (LAS) 1 23:45 Saint Louis (STL) 2
WN 3640 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Effective 2026-01-19 through 2026-01-25
Thu,Fri,Sun 18:40 Las Vegas Harry Reid (LAS) 1 23:45 Saint Louis (STL) 2
WN 3640 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Effective 2026-02-01 through 2026-02-06
Mon 18:40 Las Vegas Harry Reid (LAS) 1 23:45 Saint Louis (STL) 2
WN 3640 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Operates only on 2026-02-09
Mon,Tue,Thu 18:40 Las Vegas Harry Reid (LAS) 1 23:45 Saint Louis (STL) 2
WN 3640 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Effective 2026-02-17 through 2026-02-23
Mon 18:40 Las Vegas Harry Reid (LAS) 1 23:45 Saint Louis (STL) 2
WN 3640 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Operates only on 2026-03-02
Tue,Wed 19:45 San Jose (SJC) B 21:05 Santa Ana (SNA)
WN 3640 Non-stop Boeing 737 MAX 8 (7M8) 1:20 Effective 2026-08-04 through 2026-09-30
Fri,Sun 20:40 Orlando (MCO) 23:20 Providence (PVD)
WN 3640 Non-stop Boeing 737-700 (Scimitar Winglets) 2:40 Effective 2026-01-02 through 2026-01-04
Sun 20:45 San Jose (SJC) B 22:05 Santa Ana (SNA)
WN 3640 Non-stop Boeing 737 MAX 8 (7M8) 1:20 Effective 2026-08-09 through 2026-09-27
Tue,Wed 21:20 Chicago Midway (MDW) 23:55 Seattle-Tacoma (SEA)
WN 3640 Non-stop Boeing 737 MAX 8 (7M8) 4:35 Effective 2026-03-10 through 2026-04-01
Sat 21:40 Chicago Midway (MDW) 00:15 Seattle-Tacoma (SEA)
WN 3640 Non-stop Boeing 737 MAX 8 (7M8) 4:35 Effective 2026-03-14 through 2026-04-04
The flight arrives 1 day after departure.
Sun 21:45 Chicago Midway (MDW) 00:20 Seattle-Tacoma (SEA)
WN 3640 Non-stop Boeing 737 MAX 8 (7M8) 4:35 Effective 2026-03-08 through 2026-04-05
The flight arrives 1 day after departure.
Sat 21:55 Orlando (MCO) 00:35 Providence (PVD)
WN 3640 Non-stop Boeing 737-800 (73H) 2:40 Valid until 2026-01-03
The flight arrives 1 day after departure.
Mon,Thu,Fri 21:55 Chicago Midway (MDW) 00:30 Seattle-Tacoma (SEA)
WN 3640 Non-stop Boeing 737 MAX 8 (7M8) 4:35 Effective 2026-03-05 through 2026-04-06
The flight arrives 1 day after departure.
Non-Direct Flights:
Thu,Fri,Sun 16:30 Sacramento (SMF) B 23:45 Saint Louis (STL) 2
WN 3640 1-stop Boeing 737 MAX 8 (7M8) 5:15 Effective 2026-01-11 through 2026-01-16
Mon,Sun 16:30 Sacramento (SMF) B 23:45 Saint Louis (STL) 2
WN 3640 1-stop Boeing 737 MAX 8 (7M8) 5:15 Effective 2026-01-19 through 2026-01-25
Thu,Fri,Sun 16:30 Sacramento (SMF) B 23:45 Saint Louis (STL) 2
WN 3640 1-stop Boeing 737 MAX 8 (7M8) 5:15 Effective 2026-02-01 through 2026-02-06
Mon 16:30 Sacramento (SMF) B 23:45 Saint Louis (STL) 2
WN 3640 1-stop Boeing 737 MAX 8 (7M8) 5:15 Operates only on 2026-02-09
Mon,Tue,Thu 16:30 Sacramento (SMF) B 23:45 Saint Louis (STL) 2
WN 3640 1-stop Boeing 737 MAX 8 (7M8) 5:15 Effective 2026-02-17 through 2026-02-23
Mon 16:30 Sacramento (SMF) B 23:45 Saint Louis (STL) 2
WN 3640 1-stop Boeing 737 MAX 8 (7M8) 5:15 Operates only on 2026-03-02
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This flight number is listed as serving the following routes:


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Southwest Airlines flight WN 3640: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN3640
05:35
San Francisco (SFO) 2

09:00
Denver (DEN)
Effective 2026-06-07 through 2026-08-02
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:25, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3640
13:55
Omaha (OMA)

14:40
Phoenix Sky Harbor (PHX) 4
Effective 2026-04-07 through 2026-06-03
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:45, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN3640
15:35
Omaha (OMA)

16:20
Phoenix Sky Harbor (PHX) 4
Effective 2026-04-09 through 2026-06-01
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 2:45, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN3640
16:30
Sacramento (SMF) B

17:55
Las Vegas Harry Reid (LAS) 1
Effective 2026-01-11 through 2026-01-16
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3640
16:30
Sacramento (SMF) B

17:55
Las Vegas Harry Reid (LAS) 1
Effective 2026-01-19 through 2026-01-25
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3640
16:30
Sacramento (SMF) B

17:55
Las Vegas Harry Reid (LAS) 1
Effective 2026-02-01 through 2026-02-06
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3640
16:30
Sacramento (SMF) B

17:55
Las Vegas Harry Reid (LAS) 1
Effective 2026-02-09 through 2026-02-15
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3640
16:30
Sacramento (SMF) B

17:55
Las Vegas Harry Reid (LAS) 1
Effective 2026-02-17 through 2026-02-23
Mon
Tue
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3640
16:30
Sacramento (SMF) B

17:55
Las Vegas Harry Reid (LAS) 1
Operates only on 2026-03-02
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3640
16:40
Sacramento (SMF) B

18:05
Las Vegas Harry Reid (LAS) 1
Effective 2026-02-12 through 2026-02-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN3640
16:40
Sacramento (SMF) B

18:05
Las Vegas Harry Reid (LAS) 1
Effective 2026-02-14 through 2026-02-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3640
16:40
Sacramento (SMF) B

18:05
Las Vegas Harry Reid (LAS) 1
Effective 2026-02-20 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN3640
17:30
Omaha (OMA)

18:15
Phoenix Sky Harbor (PHX) 4
Effective 2026-04-11 through 2026-05-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:45, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3640
18:30
San Jose (SJC) B

19:50
Santa Ana (SNA)
Effective 2026-08-06 through 2026-09-28
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:20, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3640
18:40
Las Vegas Harry Reid (LAS) 1

23:45
Saint Louis (STL) 2
Effective 2026-01-11 through 2026-01-16
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3640
18:40
Las Vegas Harry Reid (LAS) 1

23:45
Saint Louis (STL) 2
Effective 2026-01-19 through 2026-01-25
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3640
18:40
Las Vegas Harry Reid (LAS) 1

23:45
Saint Louis (STL) 2
Effective 2026-02-01 through 2026-02-06
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3640
18:40
Las Vegas Harry Reid (LAS) 1

23:45
Saint Louis (STL) 2
Operates only on 2026-02-09
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3640
18:40
Las Vegas Harry Reid (LAS) 1

23:45
Saint Louis (STL) 2
Effective 2026-02-17 through 2026-02-23
Mon
Tue
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3640
18:40
Las Vegas Harry Reid (LAS) 1

23:45
Saint Louis (STL) 2
Operates only on 2026-03-02
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3640
19:45
San Jose (SJC) B

21:05
Santa Ana (SNA)
Effective 2026-08-04 through 2026-09-30
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:20, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3640
20:40
Orlando (MCO)

23:20
Providence (PVD)
Effective 2026-01-02 through 2026-01-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 2:40, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN3640
20:45
San Jose (SJC) B

22:05
Santa Ana (SNA)
Effective 2026-08-09 through 2026-09-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:20, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3640
21:20
Chicago Midway (MDW)

23:55
Seattle-Tacoma (SEA)
Effective 2026-03-10 through 2026-04-01
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 4:35, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3640
21:40
Chicago Midway (MDW)

00:15(+1)
Seattle-Tacoma (SEA)
Effective 2026-03-14 through 2026-04-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 4:35, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
Direct Flights:
Southwest Airlines WN3640
21:45
Chicago Midway (MDW)

00:20(+1)
Seattle-Tacoma (SEA)
Effective 2026-03-08 through 2026-04-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 4:35, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
Direct Flights:
Southwest Airlines WN3640
21:55
Orlando (MCO)

00:35(+1)
Providence (PVD)
Valid until 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:40, non-stop
Boeing 737-800 (73H)
The flight arrives 1 day after departure.
Direct Flights:
Southwest Airlines WN3640
21:55
Chicago Midway (MDW)

00:30(+1)
Seattle-Tacoma (SEA)
Effective 2026-03-05 through 2026-04-06
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 4:35, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
Non-Direct Flights:
Southwest Airlines WN3640
16:30
Sacramento (SMF) B

23:45
Saint Louis (STL) 2
Effective 2026-01-11 through 2026-01-16
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 5:15, 1-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
Southwest Airlines WN3640
16:30
Sacramento (SMF) B

23:45
Saint Louis (STL) 2
Effective 2026-01-19 through 2026-01-25
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 5:15, 1-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
Southwest Airlines WN3640
16:30
Sacramento (SMF) B

23:45
Saint Louis (STL) 2
Effective 2026-02-01 through 2026-02-06
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 5:15, 1-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
Southwest Airlines WN3640
16:30
Sacramento (SMF) B

23:45
Saint Louis (STL) 2
Operates only on 2026-02-09
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 5:15, 1-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
Southwest Airlines WN3640
16:30
Sacramento (SMF) B

23:45
Saint Louis (STL) 2
Effective 2026-02-17 through 2026-02-23
Mon
Tue
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 5:15, 1-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
Southwest Airlines WN3640
16:30
Sacramento (SMF) B

23:45
Saint Louis (STL) 2
Operates only on 2026-03-02
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 5:15, 1-stop
Boeing 737 MAX 8 (7M8)
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Parallax here
This flight number is listed as serving the following routes:
  • Chicago Midway (MDW) - Seattle-Tacoma (SEA)
  • Las Vegas Harry Reid (LAS) - Saint Louis (STL)
  • Omaha (OMA) - Phoenix Sky Harbor (PHX)
  • Orlando (MCO) - Providence (PVD)
  • Sacramento (SMF) - Las Vegas Harry Reid (LAS)
  • Sacramento (SMF) - Saint Louis (STL)
  • San Francisco (SFO) - Denver (DEN)
  • San Jose (SJC) - Santa Ana (SNA)
All Southwest Airlines flights
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