Southwest Airlines flight WN 3991: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Tue,Wed 06:00 Oakland (OAK) 2 09:30 Denver (DEN)
WN 3991 Non-stop Boeing 737 MAX 8 (7M8) 2:30 Effective 2025-10-07 through 2025-10-29
Mon,Thu,Fri 08:25 Oakland (OAK) 2 11:55 Denver (DEN)
WN 3991 Non-stop Boeing 737-700 (Scimitar Winglets) 2:30 Effective 2025-10-02 through 2025-10-31
Sat 13:00 Santa Ana (SNA) 14:15 Las Vegas Harry Reid (LAS) 1
WN 3991 Non-stop Boeing 737-700 (73W) 1:15 Effective 2025-06-07 through 2025-08-02
Sat 13:25 Orlando (MCO) 15:50 Indianapolis (IND)
WN 3991 Non-stop Boeing 737-700 (73W) 2:25 Valid until 2025-05-31
Sat 14:55 Las Vegas Harry Reid (LAS) 1 22:55 Albany (ALB)
WN 3991 Non-stop Boeing 737-700 (73W) 5:00 Effective 2025-06-07 through 2025-08-02
Sun 15:05 Midway, Chicago (MDW) 16:35 Minneapolis/Saint Paul (MSP) 2
WN 3991 Non-stop Boeing 737-800 (73H) 1:30 Operates only on 2025-08-31
Sun 16:15 Midway, Chicago (MDW) 18:50 Seattle-Tacoma (SEA)
WN 3991 Non-stop Boeing 737-700 (Scimitar Winglets) 4:35 Effective 2025-10-05 through 2025-10-26
Mon,Thu,Fri 18:05 Tucson (TUS) 19:25 San Diego (SAN) 1
WN 3991 Non-stop Boeing 737-700 (73W) 1:20 Valid until 2025-06-02
Tue,Wed 20:40 Santa Ana (SNA) 21:50 Las Vegas Harry Reid (LAS) 1
WN 3991 Non-stop Boeing 737-700 (73W) 1:10 Effective 2025-06-10 through 2025-07-30
Sun 21:05 Santa Ana (SNA) 22:15 Las Vegas Harry Reid (LAS) 1
WN 3991 Non-stop Boeing 737-700 (73W) 1:10 Effective 2025-06-08 through 2025-08-03
Mon,Thu,Fri 21:10 Santa Ana (SNA) 22:20 Las Vegas Harry Reid (LAS) 1
WN 3991 Non-stop Boeing 737-700 (73W) 1:10 Effective 2025-06-05 through 2025-07-03
Mon,Thu,Fri 21:10 Santa Ana (SNA) 22:20 Las Vegas Harry Reid (LAS) 1
WN 3991 Non-stop Boeing 737-700 (73W) 1:10 Effective 2025-07-07 through 2025-08-04
Sat 21:15 Fort Lauderdale (FLL) 1 23:25 Austin (AUS)
WN 3991 Non-stop Boeing 737 MAX 8 (7M8) 3:10 Effective 2025-11-22 through 2025-11-29
Sat 21:15 Fort Lauderdale (FLL) 1 23:25 Austin (AUS)
WN 3991 Non-stop Boeing 737 MAX 8 (7M8) 3:10 Effective 2025-12-20 through 2026-01-03
Sun 22:25 Midway, Chicago (MDW) 23:55 Minneapolis/Saint Paul (MSP) 2
WN 3991 Non-stop Boeing 737-700 (73W) 1:30 Effective 2025-08-10 through 2025-08-24
Sun 22:25 Midway, Chicago (MDW) 23:55 Minneapolis/Saint Paul (MSP) 2
WN 3991 Non-stop Boeing 737-700 (73W) 1:30 Effective 2025-09-07 through 2025-09-28
Non-Direct Flights:
Sat 13:00 Santa Ana (SNA) 22:55 Albany (ALB)
WN 3991 1-stop Boeing 737-700 (73W) 6:55 Effective 2025-06-07 through 2025-08-02
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This flight number is listed as serving the following routes:


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Southwest Airlines flight WN 3991: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN3991
06:00
Oakland (OAK) 2

09:30
Denver (DEN)
Effective 2025-10-07 through 2025-10-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:30, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3991
08:25
Oakland (OAK) 2

11:55
Denver (DEN)
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 2:30, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3991
13:00
Santa Ana (SNA)

14:15
Las Vegas Harry Reid (LAS) 1
Effective 2025-06-07 through 2025-08-02
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:15, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3991
13:25
Orlando (MCO)

15:50
Indianapolis (IND)
Valid until 2025-05-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:25, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3991
14:55
Las Vegas Harry Reid (LAS) 1

22:55
Albany (ALB)
Effective 2025-06-07 through 2025-08-02
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 5:00, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3991
15:05
Midway, Chicago (MDW)

16:35
Minneapolis/Saint Paul (MSP) 2
Operates only on 2025-08-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:30, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3991
16:15
Midway, Chicago (MDW)

18:50
Seattle-Tacoma (SEA)
Effective 2025-10-05 through 2025-10-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 4:35, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3991
18:05
Tucson (TUS)

19:25
San Diego (SAN) 1
Valid until 2025-06-02
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:20, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3991
20:40
Santa Ana (SNA)

21:50
Las Vegas Harry Reid (LAS) 1
Effective 2025-06-10 through 2025-07-30
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:10, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3991
21:05
Santa Ana (SNA)

22:15
Las Vegas Harry Reid (LAS) 1
Effective 2025-06-08 through 2025-08-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:10, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3991
21:10
Santa Ana (SNA)

22:20
Las Vegas Harry Reid (LAS) 1
Effective 2025-06-05 through 2025-07-03
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:10, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3991
21:10
Santa Ana (SNA)

22:20
Las Vegas Harry Reid (LAS) 1
Effective 2025-07-07 through 2025-08-04
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:10, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3991
21:15
Fort Lauderdale (FLL) 1

23:25
Austin (AUS)
Effective 2025-11-22 through 2025-11-29
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:10, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3991
21:15
Fort Lauderdale (FLL) 1

23:25
Austin (AUS)
Effective 2025-12-20 through 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:10, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3991
22:25
Midway, Chicago (MDW)

23:55
Minneapolis/Saint Paul (MSP) 2
Effective 2025-08-10 through 2025-08-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:30, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3991
22:25
Midway, Chicago (MDW)

23:55
Minneapolis/Saint Paul (MSP) 2
Effective 2025-09-07 through 2025-09-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:30, non-stop
Boeing 737-700 (73W)
Non-Direct Flights:
Southwest Airlines WN3991
13:00
Santa Ana (SNA)

22:55
Albany (ALB)
Effective 2025-06-07 through 2025-08-02
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 6:55, 1-stop
Boeing 737-700 (73W)
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Parallax here
This flight number is listed as serving the following routes:
  • Fort Lauderdale (FLL) - Austin (AUS)
  • Las Vegas Harry Reid (LAS) - Albany (ALB)
  • Midway, Chicago (MDW) - Minneapolis/Saint Paul (MSP)
  • Midway, Chicago (MDW) - Seattle-Tacoma (SEA)
  • Oakland (OAK) - Denver (DEN)
  • Orlando (MCO) - Indianapolis (IND)
  • Santa Ana (SNA) - Albany (ALB)
  • Santa Ana (SNA) - Las Vegas Harry Reid (LAS)
  • Tucson (TUS) - San Diego (SAN)
All Southwest Airlines flights
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