Copa Airlines
flight
CM 1239:
Washington Dulles - Buffalo
Washington Dulles - Buffalo
FLIGHT SCHEDULE
Direct Codeshare Flights:
Copa Airlines CM1239
Valid until 2026-01-05
Mon
Tue
Wed
Thu
Fri
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-
Sat
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-
Sun
Codeshare flight, operated by United Airlines.
(UA 3585)
Duration: 1:26, non-stop Embraer EMB 175 (E7W)
Direct Codeshare Flights:
Copa Airlines CM1239
Operates only on 2026-01-03
Mon
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Tue
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Wed
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Thu
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Fri
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Sat
Sun
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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
Operates only on 2026-01-06
Mon
-
-
Tue
Wed
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Thu
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Fri
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Sat
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Sun
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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
Effective 2026-03-05 through 2026-03-28
Mon
Tue
-
-
Wed
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-
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
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
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
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
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)
- CM 1239 is a domestic flight 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 1:22 and 1:30.