United Airlines flights from Buffalo (BUF) to Washington Dulles (IAD).

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Thu 10:29 Buffalo (BUF) 11:55 Washington Dulles (IAD)
United Airlines UA 3473 Non-stop Embraer EMB 175 (E7W) 1:26 Operates only on 2026-01-01
Mon-Wed 10:29 Buffalo (BUF) 11:55 Washington Dulles (IAD)
United Airlines UA 3499 Non-stop Embraer EMB 175 (E7W) 1:26 Valid until 2026-01-05
Sun 10:29 Buffalo (BUF) 11:55 Washington Dulles (IAD)
United Airlines UA 3520 Non-stop Embraer EMB 175 (E7W) 1:26 Valid until 2026-01-04
Sat 10:29 Buffalo (BUF) 11:55 Washington Dulles (IAD)
United Airlines UA 3520 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:26 Operates only on 2026-01-03
Daily 06:07 Buffalo (BUF) 07:35 Washington Dulles (IAD)
United Airlines UA 3634 Non-stop Embraer EMB 175 (E7W) 1:28 Effective 2026-02-12 through 2026-03-04
Daily 06:00 Buffalo (BUF) 07:19 Washington Dulles (IAD)
United Airlines UA 3991 Non-stop Embraer EMB 175 (E7W) 1:19 Effective 2026-04-30 through 2026-05-20
Daily 10:20 Buffalo (BUF) 11:41 Washington Dulles (IAD)
United Airlines UA 3992 Non-stop Embraer EMB 175 (E7W) 1:21 Effective 2026-04-30 through 2026-05-20
Daily 10:00 Buffalo (BUF) 11:27 Washington Dulles (IAD)
United Airlines UA 4182 Non-stop Canadair CRJ 550 (CR5) 1:27 Effective 2026-02-13 through 2026-03-04
Daily 19:30 Buffalo (BUF) 20:58 Washington Dulles (IAD)
United Airlines UA 4270 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:28 Effective 2026-03-05 through 2026-03-28
Daily 19:30 Buffalo (BUF) 20:49 Washington Dulles (IAD)
United Airlines UA 4270 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:19 Effective from 2026-10-25
Daily 19:48 Buffalo (BUF) 21:20 Washington Dulles (IAD)
United Airlines UA 4270 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:32 Valid until 2026-01-05
Daily 19:55 Buffalo (BUF) 21:14 Washington Dulles (IAD)
United Airlines UA 4270 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:19 Effective 2026-03-29 through 2026-10-24
Daily 14:44 Buffalo (BUF) 16:03 Washington Dulles (IAD)
United Airlines UA 4291 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:19 Effective from 2026-03-29
Daily 14:49 Buffalo (BUF) 16:19 Washington Dulles (IAD)
United Airlines UA 4291 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:30 Effective 2026-01-06 through 2026-02-11
Mon-Sat 14:49 Buffalo (BUF) 16:17 Washington Dulles (IAD)
United Airlines UA 4291 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:28 Effective 2026-03-05 through 2026-03-28
Daily 14:50 Buffalo (BUF) 16:19 Washington Dulles (IAD)
United Airlines UA 4291 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:29 Valid until 2026-01-05
Daily 06:00 Buffalo (BUF) 07:19 Washington Dulles (IAD)
United Airlines UA 4298 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:19 Effective 2026-03-29 through 2026-04-29
Daily 06:00 Buffalo (BUF) 07:19 Washington Dulles (IAD)
United Airlines UA 4298 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:19 Effective 2026-05-21 through 2026-10-24
Mon,Thu-Sun 06:07 Buffalo (BUF) 07:35 Washington Dulles (IAD)
United Airlines UA 4298 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:28 Effective 2026-03-05 through 2026-03-28
Mon-Fri,Sun 14:54 Buffalo (BUF) 16:18 Washington Dulles (IAD)
United Airlines UA 4443 Non-stop Canadair CRJ 550 (CR5) 1:24 Effective 2026-02-12 through 2026-03-04
Daily 09:55 Buffalo (BUF) 11:33 Washington Dulles (IAD)
United Airlines UA 4935 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:38 Effective 2026-01-07 through 2026-02-11
Daily 10:20 Buffalo (BUF) 11:41 Washington Dulles (IAD)
United Airlines UA 4935 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:21 Effective 2026-03-29 through 2026-04-29
Daily 10:20 Buffalo (BUF) 11:41 Washington Dulles (IAD)
United Airlines UA 4935 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:21 Effective from 2026-05-21
Tue 10:25 Buffalo (BUF) 11:55 Washington Dulles (IAD)
United Airlines UA 4935 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:30 Operates only on 2026-01-06
Fri,Sat 10:29 Buffalo (BUF) 11:55 Washington Dulles (IAD)
United Airlines UA 4935 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:26 Valid until 2026-01-02
Daily 10:32 Buffalo (BUF) 11:55 Washington Dulles (IAD)
United Airlines UA 4935 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:23 Effective 2026-03-05 through 2026-03-28
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United Airlines flights from Buffalo (BUF) to Washington Dulles (IAD).
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA3473
10:29
Buffalo (BUF)

11:55
Washington Dulles (IAD)
Operates only on 2026-01-01
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:26, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3499
10:29
Buffalo (BUF)

11:55
Washington Dulles (IAD)
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 UA3520
10:29
Buffalo (BUF)

11:55
Washington Dulles (IAD)
Valid until 2026-01-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:26, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3520
10:29
Buffalo (BUF)

11:55
Washington Dulles (IAD)
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 UA3634
06:07
Buffalo (BUF)

07:35
Washington Dulles (IAD)
Effective 2026-02-12 through 2026-03-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:28, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3991
06:00
Buffalo (BUF)

07:19
Washington Dulles (IAD)
Effective 2026-04-30 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:19, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3992
10:20
Buffalo (BUF)

11:41
Washington Dulles (IAD)
Effective 2026-04-30 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:21, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA4182
10:00
Buffalo (BUF)

11:27
Washington Dulles (IAD)
Effective 2026-02-13 through 2026-03-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:27, non-stop
Canadair CRJ 550 (CR5)
Direct Flights:
United Airlines UA4270
19:30
Buffalo (BUF)

20:58
Washington Dulles (IAD)
Effective 2026-03-05 through 2026-03-28
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:28, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
Direct Flights:
United Airlines UA4270
19:30
Buffalo (BUF)

20:49
Washington Dulles (IAD)
Effective from 2026-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:19, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
Direct Flights:
United Airlines UA4270
19:48
Buffalo (BUF)

21:20
Washington Dulles (IAD)
Valid until 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:32, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
Direct Flights:
United Airlines UA4270
19:55
Buffalo (BUF)

21:14
Washington Dulles (IAD)
Effective 2026-03-29 through 2026-10-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:19, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
Direct Flights:
United Airlines UA4291
14:44
Buffalo (BUF)

16:03
Washington Dulles (IAD)
Effective from 2026-03-29
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:19, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
Direct Flights:
United Airlines UA4291
14:49
Buffalo (BUF)

16:19
Washington Dulles (IAD)
Effective 2026-01-06 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:30, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
Direct Flights:
United Airlines UA4291
14:49
Buffalo (BUF)

16:17
Washington Dulles (IAD)
Effective 2026-03-05 through 2026-03-28
Mon
Tue
Wed
Thu
Fri
Sat
Sun
-
Duration: 1:28, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
Direct Flights:
United Airlines UA4291
14:50
Buffalo (BUF)

16:19
Washington Dulles (IAD)
Valid until 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:29, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
Direct Flights:
United Airlines UA4298
06:00
Buffalo (BUF)

07:19
Washington Dulles (IAD)
Effective 2026-03-29 through 2026-04-29
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:19, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
Direct Flights:
United Airlines UA4298
06:00
Buffalo (BUF)

07:19
Washington Dulles (IAD)
Effective 2026-05-21 through 2026-10-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:19, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
Direct Flights:
United Airlines UA4298
06:07
Buffalo (BUF)

07:35
Washington Dulles (IAD)
Effective 2026-03-05 through 2026-03-28
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
Duration: 1:28, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
Direct Flights:
United Airlines UA4443
14:54
Buffalo (BUF)

16:18
Washington Dulles (IAD)
Effective 2026-02-12 through 2026-03-04
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:24, non-stop
Canadair CRJ 550 (CR5)
Direct Flights:
United Airlines UA4935
09:55
Buffalo (BUF)

11:33
Washington Dulles (IAD)
Effective 2026-01-07 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:38, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
Direct Flights:
United Airlines UA4935
10:20
Buffalo (BUF)

11:41
Washington Dulles (IAD)
Effective 2026-03-29 through 2026-04-29
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:21, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
Direct Flights:
United Airlines UA4935
10:20
Buffalo (BUF)

11:41
Washington Dulles (IAD)
Effective from 2026-05-21
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:21, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
Direct Flights:
United Airlines UA4935
10:25
Buffalo (BUF)

11:55
Washington Dulles (IAD)
Operates only on 2026-01-06
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:30, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
Direct Flights:
United Airlines UA4935
10:29
Buffalo (BUF)

11:55
Washington Dulles (IAD)
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 UA4935
10:32
Buffalo (BUF)

11:55
Washington Dulles (IAD)
Effective 2026-03-05 through 2026-03-28
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:23, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
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Parallax here BUF-IAD
  • A domestic route departing from the Buffalo airport (BUF) and arriving at Washington Dulles airport (IAD).
  • 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 1:19 and 1:38.
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