Southwest Airlines flight WN 3991: Multiple routes

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FLIGHT SCHEDULE
Direct Flights:
Sun 05:15 Chicago Midway (MDW) 09:00 Fort Myers (RSW) WN 3991 Non-stop Boeing 737-800 (73H) 2:45 Effective 2026-03-08 through 2026-04-05
Mon,Thu,Fri 07:00 Chicago Midway (MDW) 10:50 Fort Myers (RSW) WN 3991 Non-stop Boeing 737-800 (73H) 2:50 Effective 2026-03-05 through 2026-04-06
Tue,Wed 07:10 Chicago Midway (MDW) 10:55 Fort Myers (RSW) WN 3991 Non-stop Boeing 737-800 (73H) 2:45 Effective 2026-03-10 through 2026-04-01
Sat 07:25 Chicago Midway (MDW) 11:10 Fort Myers (RSW) WN 3991 Non-stop Boeing 737-800 (73H) 2:45 Effective 2026-03-07 through 2026-04-04
Sun 08:25 Phoenix Sky Harbor (PHX) 4 12:35 Oklahoma City (OKC) WN 3991 Non-stop Boeing 737-800 (73H) 2:10 Effective 2026-08-09 through 2026-09-27
Mon,Thu,Fri 09:35 San Antonio (SAT) A 11:00 New Orleans (MSY) WN 3991 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 09:35 San Antonio (SAT) A 11:00 New Orleans (MSY) WN 3991 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Effective 2026-02-20 through 2026-03-01
Mon,Thu,Fri 10:50 New Orleans (MSY) 14:15 Ronald Reagan Washington (DCA) 1 WN 3991 Non-stop Boeing 737-800 (73H) 2:25 Effective 2026-02-05 through 2026-02-09
Tue,Thu,Sun 10:50 New Orleans (MSY) 14:15 Ronald Reagan Washington (DCA) 1 WN 3991 Non-stop Boeing 737-800 (73H) 2:25 Effective 2026-02-15 through 2026-02-19
Mon 10:50 New Orleans (MSY) 14:15 Ronald Reagan Washington (DCA) 1 WN 3991 Non-stop Boeing 737-800 (73H) 2:25 Effective 2026-02-23 through 2026-03-02
Mon,Thu,Fri 11:10 Santa Rosa (STS) 12:40 Burbank (BUR) WN 3991 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Effective 2026-06-04 through 2026-08-03
Mon-Fri 11:40 San Antonio (SAT) A 13:05 New Orleans (MSY) WN 3991 Non-stop Boeing 737-800 (73H) 1:25 Effective 2026-01-06 through 2026-01-14
Tue-Fri,Sun 11:40 San Antonio (SAT) A 13:05 New Orleans (MSY) WN 3991 Non-stop Boeing 737-800 (73H) 1:25 Effective 2026-01-18 through 2026-01-23
Mon-Fri 11:40 San Antonio (SAT) A 13:05 New Orleans (MSY) WN 3991 Non-stop Boeing 737-800 (73H) 1:25 Effective 2026-01-26 through 2026-02-04
Wed,Sun 11:40 San Antonio (SAT) A 13:05 New Orleans (MSY) WN 3991 Non-stop Boeing 737-800 (73H) 1:25 Effective 2026-02-08 through 2026-02-11
Tue 11:40 San Antonio (SAT) A 13:05 New Orleans (MSY) WN 3991 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Operates only on 2026-02-10
Tue,Wed 11:40 San Antonio (SAT) A 13:05 New Orleans (MSY) WN 3991 Non-stop Boeing 737-800 (73H) 1:25 Effective 2026-02-18 through 2026-03-04
Tue,Wed 11:40 Santa Rosa (STS) 13:05 Burbank (BUR) WN 3991 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Effective 2026-06-09 through 2026-07-29
Mon,Thu,Fri 12:00 New Orleans (MSY) 15:25 Ronald Reagan Washington (DCA) 1 WN 3991 Non-stop Boeing 737 MAX 8 (7M8) 2:25 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 12:00 New Orleans (MSY) 15:25 Ronald Reagan Washington (DCA) 1 WN 3991 Non-stop Boeing 737 MAX 8 (7M8) 2:25 Effective 2026-02-20 through 2026-03-01
Sat 14:25 New Orleans (MSY) 17:50 Ronald Reagan Washington (DCA) 1 WN 3991 Non-stop Boeing 737-800 (73H) 2:25 Effective 2026-02-14 through 2026-02-28
Tue,Wed 14:30 Dallas Love Field (DAL) 1 17:55 Tampa (TPA) WN 3991 Non-stop Boeing 737 MAX 8 (7M8) 2:25 Effective 2026-08-04 through 2026-09-30
Sun 15:55 San Diego (SAN) 1 18:55 Seattle-Tacoma (SEA) WN 3991 Non-stop Boeing 737-800 (73H) 3:00 Operates only on 2026-05-24
Sat 16:35 Buffalo (BUF) 17:15 Chicago Midway (MDW) WN 3991 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Effective 2026-08-08 through 2026-09-26
Mon,Thu,Fri 19:00 Dallas Love Field (DAL) 1 22:20 Tampa (TPA) WN 3991 Non-stop Boeing 737 MAX 8 (7M8) 2:20 Effective 2026-08-06 through 2026-09-28
Sat 21:20 Fort Lauderdale (FLL) 1 23:30 Austin (AUS) WN 3991 Non-stop Boeing 737 MAX 8 (7M8) 3:10 Valid until 2026-01-03
Sat 22:55 Sacramento (SMF) B 05:00 Nashville (BNA) WN 3991 Non-stop Boeing 737-800 (73H) 4:05 Effective 2026-04-11 through 2026-05-30 The flight arrives 1 day after departure.
Non-Direct Flights:
Mon,Thu,Fri 09:35 San Antonio (SAT) A 15:25 Ronald Reagan Washington (DCA) 1 WN 3991 1-stop Boeing 737 MAX 8 (7M8) 4:50 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 09:35 San Antonio (SAT) A 15:25 Ronald Reagan Washington (DCA) 1 WN 3991 1-stop Boeing 737 MAX 8 (7M8) 4:50 Effective 2026-02-20 through 2026-03-01

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This flight number is listed as serving the following routes:

Buffalo (BUF) - Chicago Midway (MDW)
Chicago Midway (MDW) - Fort Myers (RSW)
Dallas Love Field (DAL) - Tampa (TPA)
Fort Lauderdale (FLL) - Austin (AUS)
New Orleans (MSY) - Ronald Reagan Washington (DCA)
Phoenix Sky Harbor (PHX) - Oklahoma City (OKC)
Sacramento (SMF) - Nashville (BNA)
San Antonio (SAT) - New Orleans (MSY)
San Antonio (SAT) - Ronald Reagan Washington (DCA)
San Diego (SAN) - Seattle-Tacoma (SEA)
Santa Rosa (STS) - Burbank (BUR)

All Southwest Airlines flights

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Southwest Airlines flight WN 3991: Multiple routes

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FLIGHT SCHEDULE

Direct Flights:

Southwest Airlines WN3991

05:15

Chicago Midway (MDW)

09:00

Fort Myers (RSW)

Effective 2026-03-08 through 2026-04-05

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:45, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3991

07:00

Chicago Midway (MDW)

10:50

Fort Myers (RSW)

Effective 2026-03-05 through 2026-04-06

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 2:50, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3991

07:10

Chicago Midway (MDW)

10:55

Fort Myers (RSW)

Effective 2026-03-10 through 2026-04-01

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:45, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3991

07:25

Chicago Midway (MDW)

11:10

Fort Myers (RSW)

Effective 2026-03-07 through 2026-04-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:45, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3991

08:25

Phoenix Sky Harbor (PHX) 4

12:35

Oklahoma City (OKC)

Effective 2026-08-09 through 2026-09-27

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:10, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3991

09:35

San Antonio (SAT) A

11:00

New Orleans (MSY)

Effective 2026-02-12 through 2026-02-16

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3991

09:35

San Antonio (SAT) A

11:00

New Orleans (MSY)

Effective 2026-02-20 through 2026-03-01

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3991

10:50

New Orleans (MSY)

14:15

Ronald Reagan Washington (DCA) 1

Effective 2026-02-05 through 2026-02-09

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 2:25, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3991

10:50

New Orleans (MSY)

14:15

Ronald Reagan Washington (DCA) 1

Effective 2026-02-15 through 2026-02-19

Mon
-

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun

Duration: 2:25, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3991

10:50

New Orleans (MSY)

14:15

Ronald Reagan Washington (DCA) 1

Effective 2026-02-23 through 2026-03-02

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:25, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3991

11:10

Santa Rosa (STS)

12:40

Burbank (BUR)

Effective 2026-06-04 through 2026-08-03

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 1:30, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3991

11:40

San Antonio (SAT) A

13:05

New Orleans (MSY)

Effective 2026-01-06 through 2026-01-14

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 1:25, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3991

11:40

San Antonio (SAT) A

13:05

New Orleans (MSY)

Effective 2026-01-18 through 2026-01-23

Mon
-

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 1:25, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3991

11:40

San Antonio (SAT) A

13:05

New Orleans (MSY)

Effective 2026-01-26 through 2026-02-04

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 1:25, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3991

11:40

San Antonio (SAT) A

13:05

New Orleans (MSY)

Effective 2026-02-08 through 2026-02-11

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:25, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3991

11:40

San Antonio (SAT) A

13:05

New Orleans (MSY)

Operates only on 2026-02-10

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3991

11:40

San Antonio (SAT) A

13:05

New Orleans (MSY)

Effective 2026-02-18 through 2026-03-04

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:25, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3991

11:40

Santa Rosa (STS)

13:05

Burbank (BUR)

Effective 2026-06-09 through 2026-07-29

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3991

12:00

New Orleans (MSY)

15:25

Ronald Reagan Washington (DCA) 1

Effective 2026-02-12 through 2026-02-16

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 2:25, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3991

12:00

New Orleans (MSY)

15:25

Ronald Reagan Washington (DCA) 1

Effective 2026-02-20 through 2026-03-01

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 2:25, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3991

14:25

New Orleans (MSY)

17:50

Ronald Reagan Washington (DCA) 1

Effective 2026-02-14 through 2026-02-28

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:25, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3991

14:30

Dallas Love Field (DAL) 1

17:55

Tampa (TPA)

Effective 2026-08-04 through 2026-09-30

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:25, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3991

15:55

San Diego (SAN) 1

18:55

Seattle-Tacoma (SEA)

Operates only on 2026-05-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3991

16:35

Buffalo (BUF)

17:15

Chicago Midway (MDW)

Effective 2026-08-08 through 2026-09-26

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 1:40, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3991

19:00

Dallas Love Field (DAL) 1

22:20

Tampa (TPA)

Effective 2026-08-06 through 2026-09-28

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 2:20, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3991

21:20

Fort Lauderdale (FLL) 1

23:30

Austin (AUS)

Valid until 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:10, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3991

22:55

Sacramento (SMF) B

05:00(+1)

Nashville (BNA)

Effective 2026-04-11 through 2026-05-30

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 4:05, non-stop
Boeing 737-800 (73H)
The flight arrives 1 day after departure.

Non-Direct Flights:

Southwest Airlines WN3991

09:35

San Antonio (SAT) A

15:25

Ronald Reagan Washington (DCA) 1

Effective 2026-02-12 through 2026-02-16

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 4:50, 1-stop
Boeing 737 MAX 8 (7M8)

Non-Direct Flights:

Southwest Airlines WN3991

09:35

San Antonio (SAT) A

15:25

Ronald Reagan Washington (DCA) 1

Effective 2026-02-20 through 2026-03-01

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 4:50, 1-stop
Boeing 737 MAX 8 (7M8)

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Parallax here

This flight number is listed as serving the following routes:

Buffalo (BUF) - Chicago Midway (MDW)
Chicago Midway (MDW) - Fort Myers (RSW)
Dallas Love Field (DAL) - Tampa (TPA)
Fort Lauderdale (FLL) - Austin (AUS)
New Orleans (MSY) - Ronald Reagan Washington (DCA)
Phoenix Sky Harbor (PHX) - Oklahoma City (OKC)
Sacramento (SMF) - Nashville (BNA)
San Antonio (SAT) - New Orleans (MSY)
San Antonio (SAT) - Ronald Reagan Washington (DCA)
San Diego (SAN) - Seattle-Tacoma (SEA)
Santa Rosa (STS) - Burbank (BUR)

All Southwest Airlines flights

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