Southwest Airlines flight WN 3661: Multiple routes

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Select flight date:  Show Calendar
FLIGHT SCHEDULE
Direct Flights:
Sun 05:40 Indianapolis (IND) 06:30 Denver (DEN)
WN 3661 Non-stop Boeing 737-700 (Scimitar Winglets) 2:50 Operates only on 2025-11-30
Tue,Wed 05:50 Indianapolis (IND) 06:40 Denver (DEN)
WN 3661 Non-stop Boeing 737-800 (73H) 2:50 Effective 2025-11-04 through 2025-11-12
Sat 05:50 Indianapolis (IND) 06:40 Denver (DEN)
WN 3661 Non-stop Boeing 737 MAX 8 (7M8) 2:50 Effective 2025-11-08 through 2025-11-15
Mon-Thu 05:50 Indianapolis (IND) 06:40 Denver (DEN)
WN 3661 Non-stop Boeing 737-800 (73H) 2:50 Effective 2025-11-17 through 2025-11-20
Mon-Fri 05:50 Indianapolis (IND) 06:40 Denver (DEN)
WN 3661 Non-stop Boeing 737-800 (73H) 2:50 Effective 2025-12-02 through 2025-12-11
Sat 05:50 Indianapolis (IND) 06:40 Denver (DEN)
WN 3661 Non-stop Boeing 737 MAX 8 (7M8) 2:50 Effective 2025-12-06 through 2025-12-13
Mon-Wed 05:50 Indianapolis (IND) 06:40 Denver (DEN)
WN 3661 Non-stop Boeing 737-800 (73H) 2:50 Effective 2025-12-15 through 2025-12-17
Wed,Thu 05:50 Indianapolis (IND) 06:40 Denver (DEN)
WN 3661 Non-stop Boeing 737-800 (73H) 2:50 Effective 2025-12-24 through 2026-01-01
Mon,Thu,Fri,Sun 06:00 Indianapolis (IND) 06:55 Denver (DEN)
WN 3661 Non-stop Boeing 737-800 (73H) 2:55 Effective 2025-11-02 through 2025-11-16
Mon,Fri,Sun 06:00 Indianapolis (IND) 06:55 Denver (DEN)
WN 3661 Non-stop Boeing 737-800 (73H) 2:55 Effective 2025-11-21 through 2025-11-28
Fri,Sun 06:00 Indianapolis (IND) 06:55 Denver (DEN)
WN 3661 Non-stop Boeing 737-800 (73H) 2:55 Effective 2025-12-07 through 2025-12-14
Thu 06:00 Indianapolis (IND) 06:55 Denver (DEN)
WN 3661 Non-stop Boeing 737-800 (73H) 2:55 Operates only on 2025-12-18
Mon 06:00 Indianapolis (IND) 06:55 Denver (DEN)
WN 3661 Non-stop Boeing 737-800 (73H) 2:55 Operates only on 2026-01-05
Tue,Wed 08:05 Denver (DEN) 13:30 Tampa (TPA)
WN 3661 Non-stop Boeing 737-800 (73H) 3:25 Effective 2025-10-07 through 2025-10-29
Sat 08:35 Houston Hobby (HOU) 10:00 Colorado Springs (COS)
WN 3661 Non-stop Boeing 737-800 (73H) 2:25 Valid until 2025-05-31
Mon,Thu,Fri 11:50 Tampa (TPA) 14:45 Luis Munoz Marin, San Juan (SJU) B
WN 3661 Non-stop Boeing 737 MAX 8 (7M8) 2:55 Effective 2025-10-02 through 2025-10-31
Sun 12:55 Tampa (TPA) 15:50 Luis Munoz Marin, San Juan (SJU) B
WN 3661 Non-stop Boeing 737 MAX 8 (7M8) 2:55 Effective 2025-10-05 through 2025-10-26
Sat 13:45 Tampa (TPA) 16:40 Luis Munoz Marin, San Juan (SJU) B
WN 3661 Non-stop Boeing 737 MAX 8 (7M8) 2:55 Effective 2025-10-04 through 2025-11-01
Sun 13:55 Houston Hobby (HOU) 15:20 Colorado Springs (COS)
WN 3661 Non-stop Boeing 737-700 (73W) 2:25 Valid until 2025-05-18
Sun 13:55 Houston Hobby (HOU) 15:20 Colorado Springs (COS)
WN 3661 Non-stop Boeing 737-700 (73W) 2:25 Operates only on 2025-06-01
Tue,Wed 14:15 Tampa (TPA) 17:15 Luis Munoz Marin, San Juan (SJU) B
WN 3661 Non-stop Boeing 737-800 (73H) 3:00 Effective 2025-10-07 through 2025-10-29
Sun 15:00 Denver (DEN) 18:05 Austin (AUS)
WN 3661 Non-stop Boeing 737-700 (73W) 2:05 Effective 2025-06-08 through 2025-08-03
Sun 15:55 Colorado Springs (COS) 19:20 Midway, Chicago (MDW)
WN 3661 Non-stop Boeing 737-700 (73W) 2:25 Valid until 2025-05-18
Sun 15:55 Colorado Springs (COS) 19:20 Midway, Chicago (MDW)
WN 3661 Non-stop Boeing 737-700 (73W) 2:25 Operates only on 2025-06-01
Sat 19:40 Denver (DEN) 01:00 Tampa (TPA)
WN 3661 Non-stop Boeing 737-800 (73H) 3:20 Effective 2025-11-22 through 2025-11-29
The flight arrives 1 day after departure.
Sat 19:40 Denver (DEN) 01:00 Tampa (TPA)
WN 3661 Non-stop Boeing 737-800 (73H) 3:20 Effective 2025-12-20 through 2026-01-03
The flight arrives 1 day after departure.
Sun 19:55 Midway, Chicago (MDW) 22:45 Ronald Reagan Washington (DCA)
WN 3661 Non-stop Boeing 737-700 (73W) 1:50 Valid until 2025-05-18
Sun 19:55 Midway, Chicago (MDW) 22:45 Ronald Reagan Washington (DCA)
WN 3661 Non-stop Boeing 737-700 (73W) 1:50 Operates only on 2025-06-01
Sun 20:15 Midway, Chicago (MDW) 23:05 Ronald Reagan Washington (DCA)
WN 3661 Non-stop Boeing 737 MAX 8 (7M8) 1:50 Operates only on 2025-05-25
Mon,Thu,Fri 20:35 Midway, Chicago (MDW) 23:25 Baltimore (BWI)
WN 3661 Non-stop Boeing 737 MAX 8 (7M8) 1:50 Effective 2025-08-07 through 2025-09-29
Sun 21:15 Midway, Chicago (MDW) 00:05 Baltimore (BWI)
WN 3661 Non-stop Boeing 737 MAX 8 (7M8) 1:50 Effective 2025-08-10 through 2025-08-24
The flight arrives 1 day after departure.
Sun 21:15 Midway, Chicago (MDW) 00:05 Baltimore (BWI)
WN 3661 Non-stop Boeing 737 MAX 8 (7M8) 1:50 Effective 2025-09-07 through 2025-09-28
The flight arrives 1 day after departure.
Tue,Wed 21:35 Las Vegas Harry Reid (LAS) 1 23:50 Portland (PDX)
WN 3661 Non-stop Boeing 737 MAX 8 (7M8) 2:15 Effective 2025-06-10 through 2025-07-30
Non-Direct Flights:
Tue,Wed 08:05 Denver (DEN) 17:15 Luis Munoz Marin, San Juan (SJU) B
WN 3661 1-stop Boeing 737-800 (73H) 7:10 Effective 2025-10-07 through 2025-10-29
Sun 13:55 Houston Hobby (HOU) 19:20 Midway, Chicago (MDW)
WN 3661 1-stop Boeing 737-700 (73W) 5:25 Valid until 2025-05-18
Sun 13:55 Houston Hobby (HOU) 19:20 Midway, Chicago (MDW)
WN 3661 1-stop Boeing 737-700 (73W) 5:25 Operates only on 2025-06-01
Sun 15:55 Colorado Springs (COS) 22:45 Ronald Reagan Washington (DCA)
WN 3661 1-stop Boeing 737-700 (73W) 4:50 Valid until 2025-05-18
Sun 15:55 Colorado Springs (COS) 22:45 Ronald Reagan Washington (DCA)
WN 3661 1-stop Boeing 737-700 (73W) 4:50 Operates only on 2025-06-01
Sun 13:55 Houston Hobby (HOU) 22:45 Ronald Reagan Washington (DCA)
WN 3661 2-stop Boeing 737-700 (73W) 7:50 Valid until 2025-05-18
Sun 13:55 Houston Hobby (HOU) 22:45 Ronald Reagan Washington (DCA)
WN 3661 2-stop Boeing 737-700 (73W) 7:50 Operates only on 2025-06-01
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This flight number is listed as serving the following routes:


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Southwest Airlines flight WN 3661: Multiple routes
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Select flight date:  Show Calendar
FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN3661
05:40
Indianapolis (IND)

06:30
Denver (DEN)
Operates only on 2025-11-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:50, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3661
05:50
Indianapolis (IND)

06:40
Denver (DEN)
Effective 2025-11-04 through 2025-11-12
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:50, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3661
05:50
Indianapolis (IND)

06:40
Denver (DEN)
Effective 2025-11-08 through 2025-11-15
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:50, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3661
05:50
Indianapolis (IND)

06:40
Denver (DEN)
Effective 2025-11-17 through 2025-11-20
Mon
Tue
Wed
Thu
Fri
-
Sat
-
Sun
-
Duration: 2:50, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3661
05:50
Indianapolis (IND)

06:40
Denver (DEN)
Effective 2025-12-02 through 2025-12-11
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 2:50, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3661
05:50
Indianapolis (IND)

06:40
Denver (DEN)
Effective 2025-12-06 through 2025-12-13
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:50, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3661
05:50
Indianapolis (IND)

06:40
Denver (DEN)
Effective 2025-12-15 through 2025-12-17
Mon
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:50, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3661
05:50
Indianapolis (IND)

06:40
Denver (DEN)
Effective 2025-12-24 through 2026-01-01
Mon
-
Tue
-
Wed
Thu
Fri
-
Sat
-
Sun
-
Duration: 2:50, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3661
06:00
Indianapolis (IND)

06:55
Denver (DEN)
Effective 2025-11-02 through 2025-11-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 2:55, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3661
06:00
Indianapolis (IND)

06:55
Denver (DEN)
Effective 2025-11-21 through 2025-11-28
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 2:55, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3661
06:00
Indianapolis (IND)

06:55
Denver (DEN)
Effective 2025-12-07 through 2025-12-14
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 2:55, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3661
06:00
Indianapolis (IND)

06:55
Denver (DEN)
Operates only on 2025-12-18
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 2:55, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3661
06:00
Indianapolis (IND)

06:55
Denver (DEN)
Operates only on 2026-01-05
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:55, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3661
08:05
Denver (DEN)

13:30
Tampa (TPA)
Effective 2025-10-07 through 2025-10-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:25, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3661
08:35
Houston Hobby (HOU)

10:00
Colorado Springs (COS)
Valid until 2025-05-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:25, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3661
11:50
Tampa (TPA)

14:45
Luis Munoz Marin, San Juan (SJU) B
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 2:55, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3661
12:55
Tampa (TPA)

15:50
Luis Munoz Marin, San Juan (SJU) B
Effective 2025-10-05 through 2025-10-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:55, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3661
13:45
Tampa (TPA)

16:40
Luis Munoz Marin, San Juan (SJU) B
Effective 2025-10-04 through 2025-11-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:55, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3661
13:55
Houston Hobby (HOU)

15:20
Colorado Springs (COS)
Valid until 2025-05-18
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:25, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3661
13:55
Houston Hobby (HOU)

15:20
Colorado Springs (COS)
Operates only on 2025-06-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:25, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3661
14:15
Tampa (TPA)

17:15
Luis Munoz Marin, San Juan (SJU) B
Effective 2025-10-07 through 2025-10-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:00, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3661
15:00
Denver (DEN)

18:05
Austin (AUS)
Effective 2025-06-08 through 2025-08-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:05, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3661
15:55
Colorado Springs (COS)

19:20
Midway, Chicago (MDW)
Valid until 2025-05-18
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:25, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3661
15:55
Colorado Springs (COS)

19:20
Midway, Chicago (MDW)
Operates only on 2025-06-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:25, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3661
19:40
Denver (DEN)

01:00(+1)
Tampa (TPA)
Effective 2025-11-22 through 2025-11-29
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:20, non-stop
Boeing 737-800 (73H)
The flight arrives 1 day after departure.
Southwest Airlines WN3661
19:40
Denver (DEN)

01:00(+1)
Tampa (TPA)
Effective 2025-12-20 through 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:20, non-stop
Boeing 737-800 (73H)
The flight arrives 1 day after departure.
Southwest Airlines WN3661
19:55
Midway, Chicago (MDW)

22:45
Ronald Reagan Washington (DCA)
Valid until 2025-05-18
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:50, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3661
19:55
Midway, Chicago (MDW)

22:45
Ronald Reagan Washington (DCA)
Operates only on 2025-06-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:50, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3661
20:15
Midway, Chicago (MDW)

23:05
Ronald Reagan Washington (DCA)
Operates only on 2025-05-25
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:50, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3661
20:35
Midway, Chicago (MDW)

23:25
Baltimore (BWI)
Effective 2025-08-07 through 2025-09-29
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:50, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3661
21:15
Midway, Chicago (MDW)

00:05(+1)
Baltimore (BWI)
Effective 2025-08-10 through 2025-08-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:50, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
Southwest Airlines WN3661
21:15
Midway, Chicago (MDW)

00:05(+1)
Baltimore (BWI)
Effective 2025-09-07 through 2025-09-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:50, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
Southwest Airlines WN3661
21:35
Las Vegas Harry Reid (LAS) 1

23:50
Portland (PDX)
Effective 2025-06-10 through 2025-07-30
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:15, non-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
Southwest Airlines WN3661
08:05
Denver (DEN)

17:15
Luis Munoz Marin, San Juan (SJU) B
Effective 2025-10-07 through 2025-10-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 7:10, 1-stop
Boeing 737-800 (73H)
Southwest Airlines WN3661
13:55
Houston Hobby (HOU)

19:20
Midway, Chicago (MDW)
Valid until 2025-05-18
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 5:25, 1-stop
Boeing 737-700 (73W)
Southwest Airlines WN3661
13:55
Houston Hobby (HOU)

19:20
Midway, Chicago (MDW)
Operates only on 2025-06-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 5:25, 1-stop
Boeing 737-700 (73W)
Southwest Airlines WN3661
15:55
Colorado Springs (COS)

22:45
Ronald Reagan Washington (DCA)
Valid until 2025-05-18
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 4:50, 1-stop
Boeing 737-700 (73W)
Southwest Airlines WN3661
15:55
Colorado Springs (COS)

22:45
Ronald Reagan Washington (DCA)
Operates only on 2025-06-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 4:50, 1-stop
Boeing 737-700 (73W)
Southwest Airlines WN3661
13:55
Houston Hobby (HOU)

22:45
Ronald Reagan Washington (DCA)
Valid until 2025-05-18
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 7:50, 2-stop
Boeing 737-700 (73W)
Southwest Airlines WN3661
13:55
Houston Hobby (HOU)

22:45
Ronald Reagan Washington (DCA)
Operates only on 2025-06-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 7:50, 2-stop
Boeing 737-700 (73W)
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This flight number is listed as serving the following routes:
  • Colorado Springs (COS) - Midway, Chicago (MDW)
  • Colorado Springs (COS) - Ronald Reagan Washington (DCA)
  • Denver (DEN) - Austin (AUS)
  • Denver (DEN) - Luis Munoz Marin, San Juan (SJU)
  • Denver (DEN) - Tampa (TPA)
  • Houston Hobby (HOU) - Colorado Springs (COS)
  • Houston Hobby (HOU) - Midway, Chicago (MDW)
  • Houston Hobby (HOU) - Ronald Reagan Washington (DCA)
  • Indianapolis (IND) - Denver (DEN)
  • Las Vegas Harry Reid (LAS) - Portland (PDX)
  • Midway, Chicago (MDW) - Baltimore (BWI)
  • Midway, Chicago (MDW) - Ronald Reagan Washington (DCA)
  • Tampa (TPA) - Luis Munoz Marin, San Juan (SJU)
All Southwest Airlines flights
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