All airlines flying from Washington Dulles (IAD) to Buffalo (BUF).

FLIGHT SCHEDULE
Direct Flights:
Wed 22:18 Washington Dulles (IAD) 23:48 Buffalo (BUF) United Airlines UA 3405 Non-stop Embraer EMB 175 (E7W) 1:30 Operates only on 2026-02-11
Mon-Thu,Sun 08:20 Washington Dulles (IAD) 09:46 Buffalo (BUF) United Airlines UA 3585 Non-stop Embraer EMB 175 (E7W) 1:26 Valid until 2026-01-05
Sat 08:20 Washington Dulles (IAD) 09:46 Buffalo (BUF) United Airlines UA 3585 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:26 Operates only on 2026-01-03
Daily 22:18 Washington Dulles (IAD) 23:44 Buffalo (BUF) United Airlines UA 3682 Non-stop Embraer EMB 175 (E7W) 1:26 Effective 2026-02-12 through 2026-03-04
Daily 08:25 Washington Dulles (IAD) 09:47 Buffalo (BUF) United Airlines UA 4012 Non-stop Embraer EMB 175 (E7W) 1:22 Effective 2026-04-30 through 2026-05-20
Daily 22:15 Washington Dulles (IAD) 23:26 Buffalo (BUF) United Airlines UA 4060 Non-stop Embraer EMB 175 (E7W) 1:11 Effective 2026-04-30 through 2026-05-20
Tue 08:20 Washington Dulles (IAD) 09:46 Buffalo (BUF) United Airlines UA 4236 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:26 Operates only on 2026-01-06
Mon,Thu-Sun 08:20 Washington Dulles (IAD) 09:50 Buffalo (BUF) United Airlines UA 4236 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:30 Effective 2026-03-05 through 2026-03-28
Fri,Sat 08:25 Washington Dulles (IAD) 09:51 Buffalo (BUF) United Airlines UA 4236 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:26 Valid until 2026-01-02
Daily 08:25 Washington Dulles (IAD) 09:47 Buffalo (BUF) United Airlines UA 4236 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:22 Effective 2026-03-29 through 2026-04-29
Daily 08:25 Washington Dulles (IAD) 09:47 Buffalo (BUF) United Airlines UA 4236 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:22 Effective from 2026-05-21
Daily 12:35 Washington Dulles (IAD) 13:46 Buffalo (BUF) United Airlines UA 4335 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:11 Effective from 2026-03-29
Daily 12:40 Washington Dulles (IAD) 14:14 Buffalo (BUF) United Airlines UA 4335 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:34 Valid until 2026-02-11
Mon-Sat 12:40 Washington Dulles (IAD) 14:14 Buffalo (BUF) United Airlines UA 4335 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:34 Effective 2026-03-05 through 2026-03-28
Daily 22:15 Washington Dulles (IAD) 23:42 Buffalo (BUF) United Airlines UA 4353 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:27 Effective 2026-03-05 through 2026-03-28
Daily 22:15 Washington Dulles (IAD) 23:26 Buffalo (BUF) United Airlines UA 4353 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:11 Effective 2026-03-29 through 2026-04-29
Daily 22:15 Washington Dulles (IAD) 23:26 Buffalo (BUF) United Airlines UA 4353 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:11 Effective 2026-05-21 through 2026-10-24
Daily 17:35 Washington Dulles (IAD) 19:06 Buffalo (BUF) United Airlines UA 4383 Non-stop Canadair CRJ 550 (CR5) 1:31 Effective 2026-02-12 through 2026-03-04
Mon-Fri,Sun 12:40 Washington Dulles (IAD) 14:13 Buffalo (BUF) United Airlines UA 4455 Non-stop Canadair CRJ 550 (CR5) 1:33 Effective 2026-02-12 through 2026-03-04
Daily 17:10 Washington Dulles (IAD) 18:42 Buffalo (BUF) United Airlines UA 4823 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:32 Effective 2026-03-05 through 2026-03-28
Daily 17:10 Washington Dulles (IAD) 18:21 Buffalo (BUF) United Airlines UA 4823 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:11 Effective from 2026-03-29
Daily 17:30 Washington Dulles (IAD) 19:06 Buffalo (BUF) United Airlines UA 4823 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:36 Valid until 2026-01-05
Daily 17:48 Washington Dulles (IAD) 19:25 Buffalo (BUF) United Airlines UA 4823 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:37 Effective 2026-01-06 through 2026-02-10
Direct Codeshare Flights:
Mon-Thu,Sun 08:20 Washington Dulles (IAD) 09:46 Buffalo (BUF) Copa Airlines CM 1239 Non-stop Embraer EMB 175 (E7W) 1:26 Valid until 2026-01-05 Codeshare flight, operated by United Airlines.(UA 3585)
Sat 08:20 Washington Dulles (IAD) 09:46 Buffalo (BUF) Copa Airlines CM 1239 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:26 Operates only on 2026-01-03 Codeshare flight, operated by United Airlines.(UA 3585)
Tue 08:20 Washington Dulles (IAD) 09:46 Buffalo (BUF) Copa Airlines CM 1239 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:26 Operates only on 2026-01-06 Codeshare flight, operated by United Airlines.(UA 4236)
Mon,Thu-Sun 08:20 Washington Dulles (IAD) 09:50 Buffalo (BUF) Copa Airlines CM 1239 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:30 Effective 2026-03-05 through 2026-03-28 Codeshare flight, operated by United Airlines.(UA 4236)
Fri,Sat 08:25 Washington Dulles (IAD) 09:51 Buffalo (BUF) Copa Airlines CM 1239 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:26 Valid until 2026-01-02 Codeshare flight, operated by United Airlines.(UA 4236)
Daily 08:25 Washington Dulles (IAD) 09:47 Buffalo (BUF) Copa Airlines CM 1239 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:22 Effective 2026-03-29 through 2026-04-29 Codeshare flight, operated by United Airlines.(UA 4236)
Daily 08:25 Washington Dulles (IAD) 09:47 Buffalo (BUF) Copa Airlines CM 1239 Non-stop Embraer EMB 175 (E7W) 1:22 Effective 2026-04-30 through 2026-05-20 Codeshare flight, operated by United Airlines.(UA 4012)
Daily 08:25 Washington Dulles (IAD) 09:47 Buffalo (BUF) Copa Airlines CM 1239 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:22 Effective from 2026-05-21 Codeshare flight, operated by United Airlines.(UA 4236)
Daily 12:35 Washington Dulles (IAD) 13:46 Buffalo (BUF) Avianca AV 2042 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:11 Effective 2026-03-29 through 2026-04-19 Codeshare flight, operated by United Airlines.(UA 4335)
Wed 12:40 Washington Dulles (IAD) 14:14 Buffalo (BUF) Avianca AV 2042 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:34 Operates only on 2026-02-11 Codeshare flight, operated by United Airlines.(UA 4335)
Mon-Sat 12:40 Washington Dulles (IAD) 14:14 Buffalo (BUF) Avianca AV 2042 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:34 Effective 2026-03-23 through 2026-03-28 Codeshare flight, operated by United Airlines.(UA 4335)
Daily 17:10 Washington Dulles (IAD) 18:42 Buffalo (BUF) Avianca AV 2042 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:32 Effective 2026-03-05 through 2026-03-22 Codeshare flight, operated by United Airlines.(UA 4823)
Daily 17:10 Washington Dulles (IAD) 18:21 Buffalo (BUF) Avianca AV 2042 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:11 Effective from 2026-04-20 Codeshare flight, operated by United Airlines.(UA 4823)
Daily 17:30 Washington Dulles (IAD) 19:06 Buffalo (BUF) Avianca AV 2042 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:36 Valid until 2026-01-05 Codeshare flight, operated by United Airlines.(UA 4823)
Daily 17:35 Washington Dulles (IAD) 19:06 Buffalo (BUF) Avianca AV 2042 Non-stop Canadair CRJ 550 (CR5) 1:31 Effective 2026-02-12 through 2026-03-04 Codeshare flight, operated by United Airlines.(UA 4383)
Daily 17:48 Washington Dulles (IAD) 19:25 Buffalo (BUF) Avianca AV 2042 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:37 Effective 2026-01-06 through 2026-02-10 Codeshare flight, operated by United Airlines.(UA 4823)
Daily 17:10 Washington Dulles (IAD) 18:42 Buffalo (BUF) Copa Airlines CM 2142 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:32 Effective 2026-03-05 through 2026-03-28 Codeshare flight, operated by United Airlines.(UA 4823)
Daily 17:10 Washington Dulles (IAD) 18:21 Buffalo (BUF) Copa Airlines CM 2142 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:11 Effective from 2026-03-29 Codeshare flight, operated by United Airlines.(UA 4823)
Daily 17:30 Washington Dulles (IAD) 19:06 Buffalo (BUF) Copa Airlines CM 2142 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:36 Valid until 2026-01-05 Codeshare flight, operated by United Airlines.(UA 4823)
Daily 17:35 Washington Dulles (IAD) 19:06 Buffalo (BUF) Copa Airlines CM 2142 Non-stop Canadair CRJ 550 (CR5) 1:31 Effective 2026-02-12 through 2026-03-04 Codeshare flight, operated by United Airlines.(UA 4383)
Daily 17:48 Washington Dulles (IAD) 19:25 Buffalo (BUF) Copa Airlines CM 2142 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:37 Effective 2026-01-06 through 2026-02-10 Codeshare flight, operated by United Airlines.(UA 4823)
Thu-Sat 17:10 Washington Dulles (IAD) 18:42 Buffalo (BUF) Lufthansa LH 7566 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:32 Effective 2026-03-05 through 2026-03-07 Codeshare flight, operated by United Airlines.(UA 4823)
Daily 17:10 Washington Dulles (IAD) 18:21 Buffalo (BUF) Lufthansa LH 7566 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:11 Effective 2026-03-29 through 2026-10-24 Codeshare flight, operated by United Airlines.(UA 4823)
Daily 17:30 Washington Dulles (IAD) 19:06 Buffalo (BUF) Lufthansa LH 7566 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:36 Valid until 2026-01-05 Codeshare flight, operated by United Airlines.(UA 4823)
Daily 17:35 Washington Dulles (IAD) 19:06 Buffalo (BUF) Lufthansa LH 7566 Non-stop Canadair CRJ 550 (CR5) 1:31 Effective 2026-02-12 through 2026-03-04 Codeshare flight, operated by United Airlines.(UA 4383Z)
Daily 17:48 Washington Dulles (IAD) 19:25 Buffalo (BUF) Lufthansa LH 7566 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:37 Effective 2026-01-06 through 2026-02-10 Codeshare flight, operated by United Airlines.(UA 4823)
Daily 22:15 Washington Dulles (IAD) 23:26 Buffalo (BUF) Lufthansa LH 7824 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:11 Effective 2026-03-29 through 2026-04-29 Codeshare flight, operated by United Airlines.(UA 4353)

1 2

A domestic route departing from the Washington Dulles airport (IAD) and arriving at Buffalo airport (BUF).
The flight distance is 283 miles, or 456 km.
The timezone of both the departure and the arrival airports is UTC-5 . Current time at both airports is (loading...).
For direct flights, the flight time varies between 1:11 and 1:37.

Return (BUF-IAD) flights

Feedback - Disclaimer - Privacy

All airlines flying from Washington Dulles (IAD) to Buffalo (BUF).

FLIGHT SCHEDULE

Direct Flights:

United Airlines UA3405

22:18

Washington Dulles (IAD)

23:48

Buffalo (BUF)

Operates only on 2026-02-11

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:30, non-stop
Embraer EMB 175 (E7W)

Direct Flights:

United Airlines UA3585

08:20

Washington Dulles (IAD)

09:46

Buffalo (BUF)

Valid until 2026-01-05

Mon

Tue

Wed

Thu

Fri
-

Sat
-

Sun

Duration: 1:26, non-stop
Embraer EMB 175 (E7W)

Direct Flights:

United Airlines UA3585

08:20

Washington Dulles (IAD)

09:46

Buffalo (BUF)

Operates only on 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 1:26, non-stop
Embraer EMB 170 / EMB 175 (E70)

Direct Flights:

United Airlines UA3682

22:18

Washington Dulles (IAD)

23:44

Buffalo (BUF)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 1:26, non-stop
Embraer EMB 175 (E7W)

Direct Flights:

United Airlines UA4012

08:25

Washington Dulles (IAD)

09:47

Buffalo (BUF)

Effective 2026-04-30 through 2026-05-20

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 1:22, non-stop
Embraer EMB 175 (E7W)

Direct Flights:

United Airlines UA4060

22:15

Washington Dulles (IAD)

23:26

Buffalo (BUF)

Effective 2026-04-30 through 2026-05-20

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 1:11, non-stop
Embraer EMB 175 (E7W)

Direct Flights:

United Airlines UA4236

08:20

Washington Dulles (IAD)

09:46

Buffalo (BUF)

Operates only on 2026-01-06

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:26, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Flights:

United Airlines UA4236

08:20

Washington Dulles (IAD)

09:50

Buffalo (BUF)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat

Sun

Duration: 1:30, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Flights:

United Airlines UA4236

08:25

Washington Dulles (IAD)

09:51

Buffalo (BUF)

Valid until 2026-01-02

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat

Sun
-

Duration: 1:26, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Flights:

United Airlines UA4236

08:25

Washington Dulles (IAD)

09:47

Buffalo (BUF)

Effective 2026-03-29 through 2026-04-29

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 1:22, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Flights:

United Airlines UA4236

08:25

Washington Dulles (IAD)

09:47

Buffalo (BUF)

Effective from 2026-05-21

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 1:22, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Flights:

United Airlines UA4335

12:35

Washington Dulles (IAD)

13:46

Buffalo (BUF)

Effective from 2026-03-29

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 1:11, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Flights:

United Airlines UA4335

12:40

Washington Dulles (IAD)

14:14

Buffalo (BUF)

Valid until 2026-02-11

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 1:34, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Flights:

United Airlines UA4335

12:40

Washington Dulles (IAD)

14:14

Buffalo (BUF)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun
-

Duration: 1:34, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Flights:

United Airlines UA4353

22:15

Washington Dulles (IAD)

23:42

Buffalo (BUF)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 1:27, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Flights:

United Airlines UA4353

22:15

Washington Dulles (IAD)

23:26

Buffalo (BUF)

Effective 2026-03-29 through 2026-04-29

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 1:11, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Flights:

United Airlines UA4353

22:15

Washington Dulles (IAD)

23:26

Buffalo (BUF)

Effective 2026-05-21 through 2026-10-24

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 1:11, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Flights:

United Airlines UA4383

17:35

Washington Dulles (IAD)

19:06

Buffalo (BUF)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 1:31, non-stop
Canadair CRJ 550 (CR5)

Direct Flights:

United Airlines UA4455

12:40

Washington Dulles (IAD)

14:13

Buffalo (BUF)

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

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 1:33, non-stop
Canadair CRJ 550 (CR5)

Direct Flights:

United Airlines UA4823

17:10

Washington Dulles (IAD)

18:42

Buffalo (BUF)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 1:32, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Flights:

United Airlines UA4823

17:10

Washington Dulles (IAD)

18:21

Buffalo (BUF)

Effective from 2026-03-29

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 1:11, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Flights:

United Airlines UA4823

17:30

Washington Dulles (IAD)

19:06

Buffalo (BUF)

Valid until 2026-01-05

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 1:36, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Flights:

United Airlines UA4823

17:48

Washington Dulles (IAD)

19:25

Buffalo (BUF)

Effective 2026-01-06 through 2026-02-10

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 1:37, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Codeshare Flights:

Copa Airlines CM1239

08:20

Washington Dulles (IAD)

09:46

Buffalo (BUF)

Valid until 2026-01-05

Mon

Tue

Wed

Thu

Fri
-

Sat
-

Sun

Codeshare flight, operated by United Airlines. (UA 3585)

Duration: 1:26, non-stop
Embraer EMB 175 (E7W)

Direct Codeshare Flights:

Copa Airlines CM1239

08:20

Washington Dulles (IAD)

09:46

Buffalo (BUF)

Operates only on 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Codeshare flight, operated by United Airlines. (UA 3585)

Duration: 1:26, non-stop
Embraer EMB 170 / EMB 175 (E70)

Direct Codeshare Flights:

Copa Airlines CM1239

08:20

Washington Dulles (IAD)

09:46

Buffalo (BUF)

Operates only on 2026-01-06

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by United Airlines. (UA 4236)

Duration: 1:26, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Codeshare Flights:

Copa Airlines CM1239

08:20

Washington Dulles (IAD)

09:50

Buffalo (BUF)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 4236)

Duration: 1:30, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Codeshare Flights:

Copa Airlines CM1239

08:25

Washington Dulles (IAD)

09:51

Buffalo (BUF)

Valid until 2026-01-02

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat

Sun
-

Codeshare flight, operated by United Airlines. (UA 4236)

Duration: 1:26, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Codeshare Flights:

Copa Airlines CM1239

08:25

Washington Dulles (IAD)

09:47

Buffalo (BUF)

Effective 2026-03-29 through 2026-04-29

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 4236)

Duration: 1:22, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Codeshare Flights:

Copa Airlines CM1239

08:25

Washington Dulles (IAD)

09:47

Buffalo (BUF)

Effective 2026-04-30 through 2026-05-20

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 4012)

Duration: 1:22, non-stop
Embraer EMB 175 (E7W)

Direct Codeshare Flights:

Copa Airlines CM1239

08:25

Washington Dulles (IAD)

09:47

Buffalo (BUF)

Effective from 2026-05-21

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 4236)

Duration: 1:22, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Codeshare Flights:

Avianca AV2042

12:35

Washington Dulles (IAD)

13:46

Buffalo (BUF)

Effective 2026-03-29 through 2026-04-19

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 4335)

Duration: 1:11, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Codeshare Flights:

Avianca AV2042

12:40

Washington Dulles (IAD)

14:14

Buffalo (BUF)

Operates only on 2026-02-11

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by United Airlines. (UA 4335)

Duration: 1:34, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Codeshare Flights:

Avianca AV2042

12:40

Washington Dulles (IAD)

14:14

Buffalo (BUF)

Effective 2026-03-23 through 2026-03-28

Mon

Tue

Wed

Thu

Fri

Sat

Sun
-

Codeshare flight, operated by United Airlines. (UA 4335)

Duration: 1:34, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Codeshare Flights:

Avianca AV2042

17:10

Washington Dulles (IAD)

18:42

Buffalo (BUF)

Effective 2026-03-05 through 2026-03-22

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 4823)

Duration: 1:32, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Codeshare Flights:

Avianca AV2042

17:10

Washington Dulles (IAD)

18:21

Buffalo (BUF)

Effective from 2026-04-20

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 4823)

Duration: 1:11, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Codeshare Flights:

Avianca AV2042

17:30

Washington Dulles (IAD)

19:06

Buffalo (BUF)

Valid until 2026-01-05

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 4823)

Duration: 1:36, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Codeshare Flights:

Avianca AV2042

17:35

Washington Dulles (IAD)

19:06

Buffalo (BUF)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 4383)

Duration: 1:31, non-stop
Canadair CRJ 550 (CR5)

Direct Codeshare Flights:

Avianca AV2042

17:48

Washington Dulles (IAD)

19:25

Buffalo (BUF)

Effective 2026-01-06 through 2026-02-10

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 4823)

Duration: 1:37, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Codeshare Flights:

Copa Airlines CM2142

17:10

Washington Dulles (IAD)

18:42

Buffalo (BUF)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 4823)

Duration: 1:32, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Codeshare Flights:

Copa Airlines CM2142

17:10

Washington Dulles (IAD)

18:21

Buffalo (BUF)

Effective from 2026-03-29

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 4823)

Duration: 1:11, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Codeshare Flights:

Copa Airlines CM2142

17:30

Washington Dulles (IAD)

19:06

Buffalo (BUF)

Valid until 2026-01-05

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 4823)

Duration: 1:36, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Codeshare Flights:

Copa Airlines CM2142

17:35

Washington Dulles (IAD)

19:06

Buffalo (BUF)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 4383)

Duration: 1:31, non-stop
Canadair CRJ 550 (CR5)

Direct Codeshare Flights:

Copa Airlines CM2142

17:48

Washington Dulles (IAD)

19:25

Buffalo (BUF)

Effective 2026-01-06 through 2026-02-10

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 4823)

Duration: 1:37, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Codeshare Flights:

Lufthansa LH7566

17:10

Washington Dulles (IAD)

18:42

Buffalo (BUF)

Effective 2026-03-05 through 2026-03-07

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat

Sun
-

Codeshare flight, operated by United Airlines. (UA 4823)

Duration: 1:32, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Codeshare Flights:

Lufthansa LH7566

17:10

Washington Dulles (IAD)

18:21

Buffalo (BUF)

Effective 2026-03-29 through 2026-10-24

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 4823)

Duration: 1:11, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Codeshare Flights:

Lufthansa LH7566

17:30

Washington Dulles (IAD)

19:06

Buffalo (BUF)

Valid until 2026-01-05

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 4823)

Duration: 1:36, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Codeshare Flights:

Lufthansa LH7566

17:35

Washington Dulles (IAD)

19:06

Buffalo (BUF)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines.(UA 4383Z)

Duration: 1:31, non-stop
Canadair CRJ 550 (CR5)

Direct Codeshare Flights:

Lufthansa LH7566

17:48

Washington Dulles (IAD)

19:25

Buffalo (BUF)

Effective 2026-01-06 through 2026-02-10

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 4823)

Duration: 1:37, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Direct Codeshare Flights:

Lufthansa LH7824

22:15

Washington Dulles (IAD)

23:26

Buffalo (BUF)

Effective 2026-03-29 through 2026-04-29

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 4353)

Duration: 1:11, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)

Page 1 / 2 next

A domestic route departing from the Washington Dulles airport (IAD) and arriving at Buffalo airport (BUF).
The flight distance is 283 miles, or 456 km.
The timezone of both the departure and the arrival airports is UTC-5 . Current time at both airports is (loading...).
For direct flights, the flight time varies between 1:11 and 1:37.

Return (BUF-IAD) flights

Feedback - Disclaimer - Privacy