Southwest Airlines flight WN 1666: Multiple routes

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FLIGHT SCHEDULE
Direct Flights:
Sat 06:20 Ontario, Los Angeles (ONT) 4 09:30 Denver (DEN) WN 1666 Non-stop Boeing 737-700 (Scimitar Winglets) 2:10 Effective 2026-04-11 through 2026-05-30
Mon,Thu,Fri,Sun 06:25 Ontario, Los Angeles (ONT) 4 09:35 Denver (DEN) WN 1666 Non-stop Boeing 737 MAX 8 (7M8) 2:10 Effective 2026-04-09 through 2026-05-22
Mon,Thu,Fri,Sun 06:25 Ontario, Los Angeles (ONT) 4 09:35 Denver (DEN) WN 1666 Non-stop Boeing 737 MAX 8 (7M8) 2:10 Effective 2026-05-25 through 2026-06-01
Sun 06:40 Ontario, Los Angeles (ONT) 4 09:50 Denver (DEN) WN 1666 Non-stop Boeing 737 MAX 8 (7M8) 2:10 Operates only on 2026-05-24
Sat 07:10 Jacksonville (JAX) 09:05 Baltimore (BWI) WN 1666 Non-stop Boeing 737-700 (Scimitar Winglets) 1:55 Effective 2026-03-07 through 2026-04-04
Tue,Wed,Sun 07:35 Jacksonville (JAX) 09:30 Baltimore (BWI) WN 1666 Non-stop Boeing 737-700 (Scimitar Winglets) 1:55 Effective 2026-03-08 through 2026-04-05
Mon,Thu,Fri 07:45 Jacksonville (JAX) 09:40 Baltimore (BWI) WN 1666 Non-stop Boeing 737-700 (Scimitar Winglets) 1:55 Effective 2026-03-05 through 2026-04-06
Tue,Wed 08:45 Phoenix Sky Harbor (PHX) 4 10:05 Ontario, Los Angeles (ONT) 4 WN 1666 Non-stop Boeing 737-700 (Scimitar Winglets) 1:20 Effective 2026-04-07 through 2026-06-03
Tue,Wed 10:40 Ontario, Los Angeles (ONT) 4 13:55 Denver (DEN) WN 1666 Non-stop Boeing 737-700 (Scimitar Winglets) 2:15 Effective 2026-04-07 through 2026-06-03
Sat 13:45 Baltimore (BWI) 15:50 Denver (DEN) WN 1666 Non-stop Boeing 737 MAX 8 (7M8) 4:05 Valid until 2026-01-03
Mon,Tue,Fri,Sun 15:10 Baltimore (BWI) 17:15 Denver (DEN) WN 1666 Non-stop Boeing 737-800 (73H) 4:05 Valid until 2026-01-04
Sat 15:20 Indianapolis (IND) 17:35 Tampa (TPA) WN 1666 Non-stop Boeing 737-800 (73H) 2:15 Effective 2026-08-08 through 2026-09-26
Tue,Wed 16:25 Denver (DEN) 18:05 San Jose (SJC) B WN 1666 Non-stop Boeing 737 MAX 8 (7M8) 2:40 Effective 2026-06-09 through 2026-07-29
Mon,Thu,Fri 16:55 Boise (BOI) 18:10 Phoenix Sky Harbor (PHX) 4 WN 1666 Non-stop Boeing 737-800 (73H) 2:15 Effective 2026-08-06 through 2026-09-28
Mon-Fri 18:25 Denver (DEN) 21:05 Tulsa (TUL) WN 1666 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Effective 2026-01-06 through 2026-01-14
Tue-Fri,Sun 18:25 Denver (DEN) 21:05 Tulsa (TUL) WN 1666 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Effective 2026-01-18 through 2026-01-23
Mon-Fri 18:25 Denver (DEN) 21:05 Tulsa (TUL) WN 1666 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Effective 2026-01-26 through 2026-02-04
Tue,Wed,Sun 18:25 Denver (DEN) 21:05 Tulsa (TUL) WN 1666 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Effective 2026-02-08 through 2026-02-11
Tue,Wed 18:25 Denver (DEN) 21:05 Tulsa (TUL) WN 1666 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Effective 2026-02-18 through 2026-03-04
Wed,Thu 18:45 Denver (DEN) 21:50 San Antonio (SAT) A WN 1666 Non-stop Boeing 737-800 (73H) 2:05 Valid until 2026-01-01
Thu,Fri,Sun 18:45 Denver (DEN) 21:20 Tulsa (TUL) WN 1666 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-01-11 through 2026-01-16
Mon,Sun 18:45 Denver (DEN) 21:20 Tulsa (TUL) WN 1666 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-01-19 through 2026-01-25
Thu,Fri,Sun 18:45 Denver (DEN) 21:20 Tulsa (TUL) WN 1666 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-02-01 through 2026-02-06
Mon,Sun 18:45 Denver (DEN) 21:20 Tulsa (TUL) WN 1666 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-02-09 through 2026-02-15
Mon,Tue,Thu 18:45 Denver (DEN) 21:20 Tulsa (TUL) WN 1666 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Effective 2026-02-17 through 2026-02-23
Mon 18:45 Denver (DEN) 21:20 Tulsa (TUL) WN 1666 Non-stop Boeing 737-700 (Scimitar Winglets) 1:35 Operates only on 2026-03-02
Sat 19:40 Baltimore (BWI) 22:10 Austin (AUS) WN 1666 Non-stop Boeing 737 MAX 8 (7M8) 3:30 Effective 2026-06-06 through 2026-08-01
Mon,Thu,Fri 19:55 Denver (DEN) 22:30 Tulsa (TUL) WN 1666 Non-stop Boeing 737 MAX 8 (7M8) 1:35 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 19:55 Denver (DEN) 22:30 Tulsa (TUL) WN 1666 Non-stop Boeing 737 MAX 8 (7M8) 1:35 Effective 2026-02-20 through 2026-03-01
Mon,Thu,Fri 20:05 Baltimore (BWI) 22:35 Austin (AUS) WN 1666 Non-stop Boeing 737 MAX 8 (7M8) 3:30 Effective 2026-06-04 through 2026-08-03
Sun 20:05 Baltimore (BWI) 22:35 Austin (AUS) WN 1666 Non-stop Boeing 737-700 (Scimitar Winglets) 3:30 Effective 2026-06-07 through 2026-08-02
Sun 20:30 San Francisco (SFO) 2 21:55 Los Angeles (LAX) 1 WN 1666 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Effective 2026-08-09 through 2026-09-27
Non-Direct Flights:
Tue,Wed 08:45 Phoenix Sky Harbor (PHX) 4 13:55 Denver (DEN) WN 1666 1-stop Boeing 737-700 (Scimitar Winglets) 4:10 Effective 2026-04-07 through 2026-06-03

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This flight number is listed as serving the following routes:

Baltimore (BWI) - Austin (AUS)
Baltimore (BWI) - Denver (DEN)
Boise (BOI) - Phoenix Sky Harbor (PHX)
Denver (DEN) - San Antonio (SAT)
Denver (DEN) - San Jose (SJC)
Denver (DEN) - Tulsa (TUL)
Indianapolis (IND) - Tampa (TPA)
Jacksonville (JAX) - Baltimore (BWI)
Ontario, Los Angeles (ONT) - Denver (DEN)
Phoenix Sky Harbor (PHX) - Denver (DEN)
Phoenix Sky Harbor (PHX) - Ontario, Los Angeles (ONT)
San Francisco (SFO) - Los Angeles (LAX)

All Southwest Airlines flights

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Southwest Airlines flight WN 1666: Multiple routes

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FLIGHT SCHEDULE

Direct Flights:

Southwest Airlines WN1666

06:20

Ontario, Los Angeles (ONT) 4

09:30

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:10, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1666

06:25

Ontario, Los Angeles (ONT) 4

09:35

Denver (DEN)

Effective 2026-04-09 through 2026-05-22

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 2:10, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1666

06:25

Ontario, Los Angeles (ONT) 4

09:35

Denver (DEN)

Effective 2026-05-25 through 2026-06-01

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 2:10, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1666

06:40

Ontario, Los Angeles (ONT) 4

09:50

Denver (DEN)

Operates only on 2026-05-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:10, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1666

07:10

Jacksonville (JAX)

09:05

Baltimore (BWI)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 1:55, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1666

07:35

Jacksonville (JAX)

09:30

Baltimore (BWI)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:55, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1666

07:45

Jacksonville (JAX)

09:40

Baltimore (BWI)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 1:55, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1666

08:45

Phoenix Sky Harbor (PHX) 4

10:05

Ontario, Los Angeles (ONT) 4

Effective 2026-04-07 through 2026-06-03

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:20, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1666

10:40

Ontario, Los Angeles (ONT) 4

13:55

Denver (DEN)

Effective 2026-04-07 through 2026-06-03

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:15, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1666

13:45

Baltimore (BWI)

15:50

Denver (DEN)

Valid until 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 4:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1666

15:10

Baltimore (BWI)

17:15

Denver (DEN)

Valid until 2026-01-04

Mon

Tue

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 4:05, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN1666

15:20

Indianapolis (IND)

17:35

Tampa (TPA)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:15, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN1666

16:25

Denver (DEN)

18:05

San Jose (SJC) B

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:40, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1666

16:55

Boise (BOI)

18:10

Phoenix Sky Harbor (PHX) 4

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 2:15, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN1666

18:25

Denver (DEN)

21:05

Tulsa (TUL)

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

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 1:40, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1666

18:25

Denver (DEN)

21:05

Tulsa (TUL)

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

Mon
-

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 1:40, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1666

18:25

Denver (DEN)

21:05

Tulsa (TUL)

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

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 1:40, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1666

18:25

Denver (DEN)

21:05

Tulsa (TUL)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:40, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1666

18:25

Denver (DEN)

21:05

Tulsa (TUL)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:40, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1666

18:45

Denver (DEN)

21:50

San Antonio (SAT) A

Valid until 2026-01-01

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

Duration: 2:05, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN1666

18:45

Denver (DEN)

21:20

Tulsa (TUL)

Effective 2026-01-11 through 2026-01-16

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1666

18:45

Denver (DEN)

21:20

Tulsa (TUL)

Effective 2026-01-19 through 2026-01-25

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1666

18:45

Denver (DEN)

21:20

Tulsa (TUL)

Effective 2026-02-01 through 2026-02-06

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1666

18:45

Denver (DEN)

21:20

Tulsa (TUL)

Effective 2026-02-09 through 2026-02-15

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1666

18:45

Denver (DEN)

21:20

Tulsa (TUL)

Effective 2026-02-17 through 2026-02-23

Mon

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1666

18:45

Denver (DEN)

21:20

Tulsa (TUL)

Operates only on 2026-03-02

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1666

19:40

Baltimore (BWI)

22:10

Austin (AUS)

Effective 2026-06-06 through 2026-08-01

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:30, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1666

19:55

Denver (DEN)

22:30

Tulsa (TUL)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 1:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1666

19:55

Denver (DEN)

22:30

Tulsa (TUL)

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 1:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1666

20:05

Baltimore (BWI)

22:35

Austin (AUS)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:30, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1666

20:05

Baltimore (BWI)

22:35

Austin (AUS)

Effective 2026-06-07 through 2026-08-02

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:30, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1666

20:30

San Francisco (SFO) 2

21:55

Los Angeles (LAX) 1

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Non-Direct Flights:

Southwest Airlines WN1666

08:45

Phoenix Sky Harbor (PHX) 4

13:55

Denver (DEN)

Effective 2026-04-07 through 2026-06-03

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 4:10, 1-stop
Boeing 737-700 (Scimitar Winglets)

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Parallax here

This flight number is listed as serving the following routes:

Baltimore (BWI) - Austin (AUS)
Baltimore (BWI) - Denver (DEN)
Boise (BOI) - Phoenix Sky Harbor (PHX)
Denver (DEN) - San Antonio (SAT)
Denver (DEN) - San Jose (SJC)
Denver (DEN) - Tulsa (TUL)
Indianapolis (IND) - Tampa (TPA)
Jacksonville (JAX) - Baltimore (BWI)
Ontario, Los Angeles (ONT) - Denver (DEN)
Phoenix Sky Harbor (PHX) - Denver (DEN)
Phoenix Sky Harbor (PHX) - Ontario, Los Angeles (ONT)
San Francisco (SFO) - Los Angeles (LAX)

All Southwest Airlines flights

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- CACHE: False - LANG: en - IS_EU: False