United AirlinesUA75% on time
Flights UA4476 08:25 Mo Th Fr Sa Su · UA4335 12:50 daily · UA4558 17:40 Mo Tu We Th Fr Su · UA3463 22:17 daily
live
Direct flights from Washington (IAD) to Buffalo (BUF): 7 nonstop departures observed each week across 1 airline. 77% of the last 22 operated flights arrived within 15 minutes of schedule. The median arrival is 14 minutes early. No cancellations were recorded across the 22 tracked flights. The nonstop covers 457 km, an estimated 1 hour 5 minutes in the air. Measured by Pro Flight Search from live flight boards at Washington and Buffalo. Updated 18 September 2026 at 19:18 UTC.
IAD
Washington
heavy · +30
BUF
Buffalo
smooth · +0
457 km · ~1h 05m est.
Runs mixed · 1 airline · 7x weekly · nonstop
77% on time
of the last 22 operated IAD → BUF flights arrived within 15 minutes
Median arrival delay is −14 min. 0 of 22 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival−14 minacross the last 22 operated legs
Flight time~1h 05mestimated from route distance
Weekly departures7x1 direct airline on the leg
Cancelled0.0%recent route rate · 0 of 22
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
United Airlines
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysHistory
operated legs · board outcomes09-171I485dep +10 → arr+13
09-151I967dep +0 → arr+2
Actual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsWeather lens
Current conditions put the pressure at BUF: 39% odds of a 15+ minute delay and around +10 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →
next sweep in 120s
How the Washington to Buffalo route actually runs
Pro Flight Search records official board updates for nonstop IAD to BUF flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search — Washington (IAD) to Buffalo (BUF) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/IAD-BUF
IAD to BUF questions
Is IAD–BUF running on time right now?
Mostly on schedule. The departure side at IAD is the weaker end, route health score 80/100. The airports section above carries the live status and delay window at both ends.
Morning or evening flight on IAD–BUF?
Operators schedule morning departures around 08:25 and evening departures around 17:40 from IAD. Earlier flights typically land before destination-airport delays accumulate later in the day; check the BUF delay card to confirm conditions when you'd arrive.
How long is the flight from IAD to BUF?
Great-circle distance is 457 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 62–69 min gate-to-gate on this route.
How often does IAD–BUF fly?
United Airlines runs the route with about 25 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.
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