Southwest Airlines flight WN 3997: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Sat 05:15 Houston Hobby (HOU) 06:45 Denver (DEN)
WN 3997 Non-stop Boeing 737 MAX 8 (7M8) 2:30 Effective 2025-06-07 through 2025-08-02
Mon,Thu,Fri 05:25 Houston Hobby (HOU) 06:55 Denver (DEN)
WN 3997 Non-stop Boeing 737-700 (73W) 2:30 Effective 2025-06-05 through 2025-07-03
Fri 05:25 Houston Hobby (HOU) 06:55 Denver (DEN)
WN 3997 Non-stop Boeing 737 MAX 8 (7M8) 2:30 Operates only on 2025-07-04
Mon,Thu,Fri 05:25 Houston Hobby (HOU) 06:55 Denver (DEN)
WN 3997 Non-stop Boeing 737-700 (73W) 2:30 Effective 2025-07-07 through 2025-08-04
Sun 05:25 Manchester (MHT) 07:00 Baltimore (BWI)
WN 3997 Non-stop Boeing 737-700 (73W) 1:35 Effective 2025-08-10 through 2025-08-24
Sun 05:25 Manchester (MHT) 07:00 Baltimore (BWI)
WN 3997 Non-stop Boeing 737-700 (73W) 1:35 Effective 2025-09-07 through 2025-09-28
Tue,Wed,Sat 05:30 Manchester (MHT) 07:05 Baltimore (BWI)
WN 3997 Non-stop Boeing 737-800 (73H) 1:35 Effective 2025-08-05 through 2025-10-01
Mon,Thu,Fri 05:50 Manchester (MHT) 07:25 Baltimore (BWI)
WN 3997 Non-stop Boeing 737-800 (73H) 1:35 Effective 2025-08-07 through 2025-09-29
Sun 06:15 Manchester (MHT) 07:50 Baltimore (BWI)
WN 3997 Non-stop Boeing 737-800 (73H) 1:35 Operates only on 2025-08-31
Sun 06:30 Houston Hobby (HOU) 08:00 Denver (DEN)
WN 3997 Non-stop Boeing 737-700 (73W) 2:30 Effective 2025-06-08 through 2025-08-03
Tue,Wed 07:40 Houston Hobby (HOU) 09:10 Denver (DEN)
WN 3997 Non-stop Boeing 737-800 (73H) 2:30 Effective 2025-06-10 through 2025-07-30
Sun 10:20 John Glenn Columbus (CMH) 11:40 Baltimore (BWI)
WN 3997 Non-stop Boeing 737-700 (73W) 1:20 Operates only on 2025-05-25
Tue,Wed 11:10 Ontario, Los Angeles (ONT) 4 12:25 San Jose (SJC) B
WN 3997 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Effective 2025-11-04 through 2025-11-12
Mon-Thu 11:10 Ontario, Los Angeles (ONT) 4 12:25 San Jose (SJC) B
WN 3997 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Effective 2025-11-17 through 2025-11-20
Mon-Fri 11:10 Ontario, Los Angeles (ONT) 4 12:25 San Jose (SJC) B
WN 3997 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Effective 2025-12-02 through 2025-12-11
Mon-Wed 11:10 Ontario, Los Angeles (ONT) 4 12:25 San Jose (SJC) B
WN 3997 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Effective 2025-12-15 through 2025-12-17
Wed,Thu 11:10 Ontario, Los Angeles (ONT) 4 12:25 San Jose (SJC) B
WN 3997 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Effective 2025-12-24 through 2026-01-01
Sun 12:40 Denver (DEN) 14:00 Albuquerque (ABQ)
WN 3997 Non-stop Boeing 737-800 (73H) 1:20 Effective 2025-10-05 through 2025-10-26
Sun 15:30 Portland (PDX) 17:40 Las Vegas Harry Reid (LAS) 1
WN 3997 Non-stop Boeing 737-700 (Scimitar Winglets) 2:10 Operates only on 2025-11-30
Sun 18:15 Las Vegas Harry Reid (LAS) 1 19:15 Ontario, Los Angeles (ONT) 4
WN 3997 Non-stop Boeing 737-700 (Scimitar Winglets) 1:00 Operates only on 2025-11-30
Sun 19:50 Ontario, Los Angeles (ONT) 4 21:05 San Jose (SJC) B
WN 3997 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Operates only on 2025-11-30
Mon,Thu,Fri,Sun 20:20 Ontario, Los Angeles (ONT) 4 21:40 San Jose (SJC) B
WN 3997 Non-stop Boeing 737-700 (Scimitar Winglets) 1:20 Effective 2025-11-02 through 2025-11-16
Mon,Fri,Sun 20:20 Ontario, Los Angeles (ONT) 4 21:40 San Jose (SJC) B
WN 3997 Non-stop Boeing 737-700 (Scimitar Winglets) 1:20 Effective 2025-11-21 through 2025-11-28
Fri,Sun 20:20 Ontario, Los Angeles (ONT) 4 21:40 San Jose (SJC) B
WN 3997 Non-stop Boeing 737-700 (Scimitar Winglets) 1:20 Effective 2025-12-07 through 2025-12-14
Thu 20:20 Ontario, Los Angeles (ONT) 4 21:40 San Jose (SJC) B
WN 3997 Non-stop Boeing 737-700 (Scimitar Winglets) 1:20 Operates only on 2025-12-18
Mon 20:20 Ontario, Los Angeles (ONT) 4 21:40 San Jose (SJC) B
WN 3997 Non-stop Boeing 737-700 (Scimitar Winglets) 1:20 Operates only on 2026-01-05
Non-Direct Flights:
Sun 15:30 Portland (PDX) 19:15 Ontario, Los Angeles (ONT) 4
WN 3997 1-stop Boeing 737-700 (Scimitar Winglets) 3:45 Operates only on 2025-11-30
Sun 18:15 Las Vegas Harry Reid (LAS) 1 21:05 San Jose (SJC) B
WN 3997 1-stop Boeing 737-700 (Scimitar Winglets) 2:50 Operates only on 2025-11-30
Sun 15:30 Portland (PDX) 21:05 San Jose (SJC) B
WN 3997 2-stop Boeing 737-700 (Scimitar Winglets) 5:35 Operates only on 2025-11-30
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This flight number is listed as serving the following routes:


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Southwest Airlines flight WN 3997: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN3997
05:15
Houston Hobby (HOU)

06:45
Denver (DEN)
Effective 2025-06-07 through 2025-08-02
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:30, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3997
05:25
Houston Hobby (HOU)

06:55
Denver (DEN)
Effective 2025-06-05 through 2025-07-03
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 2:30, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3997
05:25
Houston Hobby (HOU)

06:55
Denver (DEN)
Operates only on 2025-07-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 2:30, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN3997
05:25
Houston Hobby (HOU)

06:55
Denver (DEN)
Effective 2025-07-07 through 2025-08-04
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 2:30, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3997
05:25
Manchester (MHT)

07:00
Baltimore (BWI)
Effective 2025-08-10 through 2025-08-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:35, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3997
05:25
Manchester (MHT)

07:00
Baltimore (BWI)
Effective 2025-09-07 through 2025-09-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:35, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3997
05:30
Manchester (MHT)

07:05
Baltimore (BWI)
Effective 2025-08-05 through 2025-10-01
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:35, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3997
05:50
Manchester (MHT)

07:25
Baltimore (BWI)
Effective 2025-08-07 through 2025-09-29
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:35, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3997
06:15
Manchester (MHT)

07:50
Baltimore (BWI)
Operates only on 2025-08-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:35, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3997
06:30
Houston Hobby (HOU)

08:00
Denver (DEN)
Effective 2025-06-08 through 2025-08-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:30, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3997
07:40
Houston Hobby (HOU)

09:10
Denver (DEN)
Effective 2025-06-10 through 2025-07-30
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:30, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3997
10:20
John Glenn Columbus (CMH)

11:40
Baltimore (BWI)
Operates only on 2025-05-25
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:20, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN3997
11:10
Ontario, Los Angeles (ONT) 4

12:25
San Jose (SJC) B
Effective 2025-11-04 through 2025-11-12
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3997
11:10
Ontario, Los Angeles (ONT) 4

12:25
San Jose (SJC) B
Effective 2025-11-17 through 2025-11-20
Mon
Tue
Wed
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3997
11:10
Ontario, Los Angeles (ONT) 4

12:25
San Jose (SJC) B
Effective 2025-12-02 through 2025-12-11
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3997
11:10
Ontario, Los Angeles (ONT) 4

12:25
San Jose (SJC) B
Effective 2025-12-15 through 2025-12-17
Mon
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3997
11:10
Ontario, Los Angeles (ONT) 4

12:25
San Jose (SJC) B
Effective 2025-12-24 through 2026-01-01
Mon
-
Tue
-
Wed
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3997
12:40
Denver (DEN)

14:00
Albuquerque (ABQ)
Effective 2025-10-05 through 2025-10-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:20, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN3997
15:30
Portland (PDX)

17:40
Las Vegas Harry Reid (LAS) 1
Operates only on 2025-11-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:10, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3997
18:15
Las Vegas Harry Reid (LAS) 1

19:15
Ontario, Los Angeles (ONT) 4
Operates only on 2025-11-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:00, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3997
19:50
Ontario, Los Angeles (ONT) 4

21:05
San Jose (SJC) B
Operates only on 2025-11-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3997
20:20
Ontario, Los Angeles (ONT) 4

21:40
San Jose (SJC) B
Effective 2025-11-02 through 2025-11-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 1:20, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3997
20:20
Ontario, Los Angeles (ONT) 4

21:40
San Jose (SJC) B
Effective 2025-11-21 through 2025-11-28
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 1:20, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3997
20:20
Ontario, Los Angeles (ONT) 4

21:40
San Jose (SJC) B
Effective 2025-12-07 through 2025-12-14
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 1:20, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3997
20:20
Ontario, Los Angeles (ONT) 4

21:40
San Jose (SJC) B
Operates only on 2025-12-18
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:20, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3997
20:20
Ontario, Los Angeles (ONT) 4

21:40
San Jose (SJC) B
Operates only on 2026-01-05
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:20, non-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN3997
15:30
Portland (PDX)

19:15
Ontario, Los Angeles (ONT) 4
Operates only on 2025-11-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:45, 1-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3997
18:15
Las Vegas Harry Reid (LAS) 1

21:05
San Jose (SJC) B
Operates only on 2025-11-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:50, 1-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN3997
15:30
Portland (PDX)

21:05
San Jose (SJC) B
Operates only on 2025-11-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 5:35, 2-stop
Boeing 737-700 (Scimitar Winglets)
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This flight number is listed as serving the following routes:
  • Denver (DEN) - Albuquerque (ABQ)
  • Houston Hobby (HOU) - Denver (DEN)
  • John Glenn Columbus (CMH) - Baltimore (BWI)
  • Las Vegas Harry Reid (LAS) - Ontario, Los Angeles (ONT)
  • Las Vegas Harry Reid (LAS) - San Jose (SJC)
  • Manchester (MHT) - Baltimore (BWI)
  • Ontario, Los Angeles (ONT) - San Jose (SJC)
  • Portland (PDX) - Las Vegas Harry Reid (LAS)
  • Portland (PDX) - Ontario, Los Angeles (ONT)
  • Portland (PDX) - San Jose (SJC)
All Southwest Airlines flights
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