Southwest Airlines flight WN 3645: Multiple routes

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FLIGHT SCHEDULE
Direct Flights:
Tue,Wed 05:55 Denver (DEN) 09:20 Midway, Chicago (MDW)
WN 3645 Non-stop Boeing 737-700 (73W) 2:25 Valid until 2025-06-04
Fri 08:35 Phoenix Sky Harbor (PHX) 4 13:55 Birmingham (BHM)
WN 3645 Non-stop Boeing 737-700 (73W) 3:20 Operates only on 2025-07-04
Sun 08:50 Luis Munoz Marin, San Juan (SJU) B 11:50 Orlando (MCO)
WN 3645 Non-stop Boeing 737 MAX 8 (7M8) 3:00 Operates only on 2025-08-31
Sun 09:05 Denver (DEN) 12:25 Midway, Chicago (MDW)
WN 3645 Non-stop Boeing 737-800 (73H) 2:20 Operates only on 2025-05-25
Sun 09:45 Phoenix Sky Harbor (PHX) 4 15:00 Birmingham (BHM)
WN 3645 Non-stop Boeing 737 MAX 8 (7M8) 3:15 Effective 2025-06-08 through 2025-08-03
Tue,Wed 13:00 Midway, Chicago (MDW) 15:55 Atlanta (ATL) N
WN 3645 Non-stop Boeing 737 MAX 8 (7M8) 1:55 Effective 2025-08-05 through 2025-10-01
Mon,Thu,Fri 13:30 Phoenix Sky Harbor (PHX) 4 18:45 Birmingham (BHM)
WN 3645 Non-stop Boeing 737-800 (73H) 3:15 Effective 2025-06-05 through 2025-07-03
Mon,Thu,Fri 13:30 Phoenix Sky Harbor (PHX) 4 18:45 Birmingham (BHM)
WN 3645 Non-stop Boeing 737-800 (73H) 3:15 Effective 2025-07-07 through 2025-08-04
Mon,Thu,Fri 17:30 Manchester (MHT) 18:55 Midway, Chicago (MDW)
WN 3645 Non-stop Boeing 737-700 (73W) 2:25 Effective 2025-08-07 through 2025-09-29
Sat 17:35 Midway, Chicago (MDW) 20:30 Atlanta (ATL) N
WN 3645 Non-stop Boeing 737-800 (73H) 1:55 Effective 2025-08-09 through 2025-09-27
Sat 18:40 Phoenix Sky Harbor (PHX) 4 21:50 Wichita (ICT)
WN 3645 Non-stop Boeing 737-800 (73H) 2:10 Effective 2025-11-08 through 2025-11-15
Sat 18:40 Phoenix Sky Harbor (PHX) 4 21:50 Wichita (ICT)
WN 3645 Non-stop Boeing 737-800 (73H) 2:10 Effective 2025-12-06 through 2025-12-13
Mon-Wed 19:20 Miami (MIA) 21:20 Saint Louis (STL) 2
WN 3645 Non-stop Boeing 737-800 (73H) 3:00 Effective 2025-11-25 through 2025-12-01
Mon,Tue,Fri,Sun 19:20 Miami (MIA) 21:20 Saint Louis (STL) 2
WN 3645 Non-stop Boeing 737-800 (73H) 3:00 Effective 2025-12-19 through 2026-01-04
Mon,Thu,Fri 19:30 Midway, Chicago (MDW) 22:20 Atlanta (ATL) N
WN 3645 Non-stop Boeing 737-700 (73W) 1:50 Effective 2025-08-07 through 2025-09-29
Sat 19:50 Miami (MIA) 22:00 Saint Louis (STL) 2
WN 3645 Non-stop Boeing 737-800 (73H) 3:10 Effective 2025-11-22 through 2025-11-29
Sat 19:50 Miami (MIA) 22:00 Saint Louis (STL) 2
WN 3645 Non-stop Boeing 737-800 (73H) 3:10 Effective 2025-12-20 through 2026-01-03
Sun 20:05 Midway, Chicago (MDW) 22:55 Richmond (RIC)
WN 3645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:50 Effective 2025-10-05 through 2025-10-26
Sun 21:50 San Antonio (SAT) A 23:45 Kansas City (MCI)
WN 3645 Non-stop Boeing 737-800 (73H) 1:55 Operates only on 2025-11-30
Non-Direct Flights:
Mon,Thu,Fri 17:30 Manchester (MHT) 22:20 Atlanta (ATL) N
WN 3645 1-stop Boeing 737-700 (73W) 4:50 Effective 2025-08-07 through 2025-09-29
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This flight number is listed as serving the following routes:


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Southwest Airlines flight WN 3645: Multiple routes
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FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN3645
05:55
Denver (DEN)

09:20
Midway, Chicago (MDW)
Valid until 2025-06-04
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:25, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3645
08:35
Phoenix Sky Harbor (PHX) 4

13:55
Birmingham (BHM)
Operates only on 2025-07-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 3:20, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3645
08:50
Luis Munoz Marin, San Juan (SJU) B

11:50
Orlando (MCO)
Operates only on 2025-08-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:00, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3645
09:05
Denver (DEN)

12:25
Midway, Chicago (MDW)
Operates only on 2025-05-25
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:20, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3645
09:45
Phoenix Sky Harbor (PHX) 4

15:00
Birmingham (BHM)
Effective 2025-06-08 through 2025-08-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:15, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3645
13:00
Midway, Chicago (MDW)

15:55
Atlanta (ATL) N
Effective 2025-08-05 through 2025-10-01
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:55, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3645
13:30
Phoenix Sky Harbor (PHX) 4

18:45
Birmingham (BHM)
Effective 2025-06-05 through 2025-07-03
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 3:15, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3645
13:30
Phoenix Sky Harbor (PHX) 4

18:45
Birmingham (BHM)
Effective 2025-07-07 through 2025-08-04
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 3:15, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3645
17:30
Manchester (MHT)

18:55
Midway, Chicago (MDW)
Effective 2025-08-07 through 2025-09-29
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 2:25, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3645
17:35
Midway, Chicago (MDW)

20:30
Atlanta (ATL) N
Effective 2025-08-09 through 2025-09-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:55, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3645
18:40
Phoenix Sky Harbor (PHX) 4

21:50
Wichita (ICT)
Effective 2025-11-08 through 2025-11-15
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:10, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3645
18:40
Phoenix Sky Harbor (PHX) 4

21:50
Wichita (ICT)
Effective 2025-12-06 through 2025-12-13
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:10, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3645
19:20
Miami (MIA)

21:20
Saint Louis (STL) 2
Effective 2025-11-25 through 2025-12-01
Mon
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:00, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3645
19:20
Miami (MIA)

21:20
Saint Louis (STL) 2
Effective 2025-12-19 through 2026-01-04
Mon
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 3:00, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3645
19:30
Midway, Chicago (MDW)

22:20
Atlanta (ATL) N
Effective 2025-08-07 through 2025-09-29
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:50, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3645
19:50
Miami (MIA)

22:00
Saint Louis (STL) 2
Effective 2025-11-22 through 2025-11-29
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:10, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3645
19:50
Miami (MIA)

22:00
Saint Louis (STL) 2
Effective 2025-12-20 through 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:10, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3645
20:05
Midway, Chicago (MDW)

22:55
Richmond (RIC)
Effective 2025-10-05 through 2025-10-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:50, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3645
21:50
San Antonio (SAT) A

23:45
Kansas City (MCI)
Operates only on 2025-11-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:55, non-stop
Boeing 737-800 (73H)
Non-Direct Flights:
Southwest Airlines WN3645
17:30
Manchester (MHT)

22:20
Atlanta (ATL) N
Effective 2025-08-07 through 2025-09-29
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 4:50, 1-stop
Boeing 737-700 (73W)
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This flight number is listed as serving the following routes:
  • Denver (DEN) - Midway, Chicago (MDW)
  • Luis Munoz Marin, San Juan (SJU) - Orlando (MCO)
  • Manchester (MHT) - Atlanta (ATL)
  • Manchester (MHT) - Midway, Chicago (MDW)
  • Miami (MIA) - Saint Louis (STL)
  • Midway, Chicago (MDW) - Atlanta (ATL)
  • Midway, Chicago (MDW) - Richmond (RIC)
  • Phoenix Sky Harbor (PHX) - Birmingham (BHM)
  • Phoenix Sky Harbor (PHX) - Wichita (ICT)
  • San Antonio (SAT) - Kansas City (MCI)
All Southwest Airlines flights
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