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

FLIGHT SCHEDULE
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 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)

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.

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FLIGHT SCHEDULE

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:

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)

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.

All IAD-BUF flights

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