All airlines flying from Buffalo (BUF) to Denver (DEN).

FLIGHT SCHEDULE
Direct Flights:
Sat 15:25 Buffalo (BUF) 17:00 Denver (DEN) Southwest Airlines WN 435 Non-stop Boeing 737-700 (Scimitar Winglets) 3:35 Effective 2026-04-11 through 2026-05-30
Mon,Thu,Fri 06:50 Buffalo (BUF) 08:15 Denver (DEN) Southwest Airlines WN 437 Non-stop Boeing 737 MAX 8 (7M8) 3:25 Effective 2026-08-06 through 2026-09-28
Sat 16:50 Buffalo (BUF) 18:20 Denver (DEN) Southwest Airlines WN 450 Non-stop Boeing 737-800 (73H) 3:30 Effective 2026-06-06 through 2026-08-01
Sat 17:15 Buffalo (BUF) 18:40 Denver (DEN) Southwest Airlines WN 569 Non-stop Boeing 737 MAX 8 (7M8) 3:25 Effective 2026-08-08 through 2026-09-26
Mon,Thu,Fri 10:35 Buffalo (BUF) 12:25 Denver (DEN) Southwest Airlines WN 608 Non-stop Boeing 737 MAX 8 (7M8) 3:50 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 10:35 Buffalo (BUF) 12:25 Denver (DEN) Southwest Airlines WN 608 Non-stop Boeing 737 MAX 8 (7M8) 3:50 Effective 2026-02-20 through 2026-03-01
Tue,Wed 12:40 Buffalo (BUF) 14:10 Denver (DEN) Southwest Airlines WN 739 Non-stop Boeing 737-800 (73H) 3:30 Effective 2026-06-09 through 2026-07-29
Sat 06:45 Buffalo (BUF) 08:10 Denver (DEN) Southwest Airlines WN 760 Non-stop Boeing 737-800 (73H) 3:25 Effective 2026-08-08 through 2026-09-26
Sat 05:15 Buffalo (BUF) 07:10 Denver (DEN) Southwest Airlines WN 1219 Non-stop Boeing 737-800 (73H) 3:55 Effective 2026-01-10 through 2026-02-07
Sat 05:05 Buffalo (BUF) 06:40 Denver (DEN) Southwest Airlines WN 1514 Non-stop Boeing 737 MAX 8 (7M8) 3:35 Effective 2026-06-06 through 2026-08-01
Daily 08:17 Buffalo (BUF) 10:01 Denver (DEN) United Airlines UA 1727 Non-stop Boeing 737-800 (738) 3:44 Effective 2026-03-05 through 2026-03-28
Daily 08:25 Buffalo (BUF) 10:09 Denver (DEN) United Airlines UA 1727 Non-stop Boeing 737-800 (738) 3:44 Effective 2026-02-12 through 2026-03-04
Daily 08:30 Buffalo (BUF) 10:15 Denver (DEN) United Airlines UA 1727 Non-stop Boeing 737-800 (738) 3:45 Effective from 2026-03-29
Mon,Tue,Fri,Sun 10:20 Buffalo (BUF) 11:55 Denver (DEN) Southwest Airlines WN 2140 Non-stop Boeing 737-800 (73H) 3:35 Valid until 2026-01-04
Mon 10:40 Buffalo (BUF) 12:15 Denver (DEN) Southwest Airlines WN 2140 Non-stop Boeing 737 MAX 8 (7M8) 3:35 Operates only on 2026-01-05
Sat 17:05 Buffalo (BUF) 19:00 Denver (DEN) Southwest Airlines WN 2400 Non-stop Boeing 737-700 (Scimitar Winglets) 3:55 Effective 2026-02-14 through 2026-02-28
Sun 17:25 Buffalo (BUF) 19:00 Denver (DEN) Southwest Airlines WN 2589 Non-stop Boeing 737-800 (73H) 3:35 Effective 2026-06-07 through 2026-08-02
Sun 16:35 Buffalo (BUF) 18:00 Denver (DEN) Southwest Airlines WN 2904 Non-stop Boeing 737-800 (73H) 3:25 Effective 2026-08-09 through 2026-09-27
Wed 15:55 Buffalo (BUF) 17:20 Denver (DEN) Southwest Airlines WN 3183 Non-stop Boeing 737-800 (73H) 3:25 Effective 2026-08-05 through 2026-09-30
Thu,Fri,Sun 10:30 Buffalo (BUF) 12:20 Denver (DEN) Southwest Airlines WN 3238 Non-stop Boeing 737 MAX 8 (7M8) 3:50 Effective 2026-01-11 through 2026-01-16
Mon,Sun 10:30 Buffalo (BUF) 12:20 Denver (DEN) Southwest Airlines WN 3238 Non-stop Boeing 737 MAX 8 (7M8) 3:50 Effective 2026-01-19 through 2026-01-25
Thu,Fri,Sun 10:30 Buffalo (BUF) 12:20 Denver (DEN) Southwest Airlines WN 3238 Non-stop Boeing 737 MAX 8 (7M8) 3:50 Effective 2026-02-01 through 2026-02-06
Mon,Sun 10:30 Buffalo (BUF) 12:20 Denver (DEN) Southwest Airlines WN 3238 Non-stop Boeing 737 MAX 8 (7M8) 3:50 Effective 2026-02-09 through 2026-02-15
Mon,Tue,Thu 10:30 Buffalo (BUF) 12:20 Denver (DEN) Southwest Airlines WN 3238 Non-stop Boeing 737 MAX 8 (7M8) 3:50 Effective 2026-02-17 through 2026-02-23
Mon 10:30 Buffalo (BUF) 12:20 Denver (DEN) Southwest Airlines WN 3238 Non-stop Boeing 737 MAX 8 (7M8) 3:50 Operates only on 2026-03-02
Mon,Thu,Fri 16:10 Buffalo (BUF) 17:45 Denver (DEN) Southwest Airlines WN 3413 Non-stop Boeing 737-800 (73H) 3:35 Effective 2026-06-04 through 2026-08-03
Sat 05:00 Buffalo (BUF) 06:50 Denver (DEN) Southwest Airlines WN 3932 Non-stop Boeing 737 MAX 8 (7M8) 3:50 Valid until 2026-01-03
Sun 05:15 Buffalo (BUF) 06:50 Denver (DEN) Southwest Airlines WN 3974 Non-stop Boeing 737 MAX 8 (7M8) 3:35 Effective 2026-06-07 through 2026-08-02
Sat 20:20 Buffalo (BUF) 22:00 Denver (DEN) Southwest Airlines WN 4232 Non-stop Boeing 737 MAX 8 (7M8) 3:40 Valid until 2026-01-03
Tue 15:55 Buffalo (BUF) 17:20 Denver (DEN) Southwest Airlines WN 4564 Non-stop Boeing 737-800 (73H) 3:25 Effective 2026-08-04 through 2026-09-29
Non-Direct Flights:
Tue,Wed 10:25 Buffalo (BUF) 13:40 Denver (DEN) Southwest Airlines WN 500 1-stop Boeing 737-700 (Scimitar Winglets) 5:15 Effective 2026-06-09 through 2026-07-29
Sat 15:35 Buffalo (BUF) 21:15 Denver (DEN) Southwest Airlines WN 725 1-stop Boeing 737 MAX 8 (7M8) 7:40 Effective 2026-02-14 through 2026-02-28

A domestic route departing from the Buffalo airport (BUF) and arriving at Denver airport (DEN).
The flight distance is 1355 miles, or 2180 km.
The timezone of the departure airport is UTC-5 , and the timezone of the arrival airport is UTC-7 . Current time at the point of departure is (loading...), and (loading...) at the point of arrival. There is a (loading...) hour time difference between the airports.
For direct flights, the flight time varies between 3:25 and 3:55.

Return (DEN-BUF) flights

Feedback - Disclaimer - Privacy

All airlines flying from Buffalo (BUF) to Denver (DEN).

FLIGHT SCHEDULE

Direct Flights:

Southwest Airlines WN435

15:25

Buffalo (BUF)

17:00

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN437

06:50

Buffalo (BUF)

08:15

Denver (DEN)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:25, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN450

16:50

Buffalo (BUF)

18:20

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:30, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN569

17:15

Buffalo (BUF)

18:40

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:25, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN608

10:35

Buffalo (BUF)

12:25

Denver (DEN)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:50, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN608

10:35

Buffalo (BUF)

12:25

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:50, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN739

12:40

Buffalo (BUF)

14:10

Denver (DEN)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:30, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN760

06:45

Buffalo (BUF)

08:10

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:25, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN1219

05:15

Buffalo (BUF)

07:10

Denver (DEN)

Effective 2026-01-10 through 2026-02-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:55, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN1514

05:05

Buffalo (BUF)

06:40

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

United Airlines UA1727

08:17

Buffalo (BUF)

10:01

Denver (DEN)

Effective 2026-03-05 through 2026-03-28

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:44, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA1727

08:25

Buffalo (BUF)

10:09

Denver (DEN)

Effective 2026-02-12 through 2026-03-04

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:44, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA1727

08:30

Buffalo (BUF)

10:15

Denver (DEN)

Effective from 2026-03-29

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:45, non-stop
Boeing 737-800 (738)

Direct Flights:

Southwest Airlines WN2140

10:20

Buffalo (BUF)

11:55

Denver (DEN)

Valid until 2026-01-04

Mon

Tue

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 3:35, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2140

10:40

Buffalo (BUF)

12:15

Denver (DEN)

Operates only on 2026-01-05

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2400

17:05

Buffalo (BUF)

19:00

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:55, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN2589

17:25

Buffalo (BUF)

19:00

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:35, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2904

16:35

Buffalo (BUF)

18:00

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:25, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3183

15:55

Buffalo (BUF)

17:20

Denver (DEN)

Effective 2026-08-05 through 2026-09-30

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:25, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3238

10:30

Buffalo (BUF)

12:20

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:50, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3238

10:30

Buffalo (BUF)

12:20

Denver (DEN)

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

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:50, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3238

10:30

Buffalo (BUF)

12:20

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:50, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3238

10:30

Buffalo (BUF)

12:20

Denver (DEN)

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

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:50, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3238

10:30

Buffalo (BUF)

12:20

Denver (DEN)

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

Mon

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 3:50, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3238

10:30

Buffalo (BUF)

12:20

Denver (DEN)

Operates only on 2026-03-02

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:50, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3413

16:10

Buffalo (BUF)

17:45

Denver (DEN)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:35, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3932

05:00

Buffalo (BUF)

06:50

Denver (DEN)

Valid until 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:50, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3974

05:15

Buffalo (BUF)

06:50

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4232

20:20

Buffalo (BUF)

22:00

Denver (DEN)

Valid until 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:40, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4564

15:55

Buffalo (BUF)

17:20

Denver (DEN)

Effective 2026-08-04 through 2026-09-29

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:25, non-stop
Boeing 737-800 (73H)

Non-Direct Flights:

Southwest Airlines WN500

10:25

Buffalo (BUF)

13:40

Denver (DEN)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 5:15, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN725

15:35

Buffalo (BUF)

21:15

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

A domestic route departing from the Buffalo airport (BUF) and arriving at Denver airport (DEN).
The flight distance is 1355 miles, or 2180 km.
The timezone of the departure airport is UTC-5 , and the timezone of the arrival airport is UTC-7 . Current time at the point of departure is (loading...), and (loading...) at the point of arrival. There is a (loading...) hour time difference between the airports.
For direct flights, the flight time varies between 3:25 and 3:55.

Return (DEN-BUF) flights

Feedback - Disclaimer - Privacy