Delta Air LinesDL
Flights DL8859 15:45 Sa
live
Direct flights from Houston (IAH) to Buffalo (BUF): 1 nonstop departure observed each week across 1 airline. The nonstop covers 2,062 km, an estimated 3 hours 9 minutes in the air. Measured by Pro Flight Search from live flight boards at Houston and Buffalo. Updated 12 September 2026 at 20:54 UTC.
IAH
Houston
smooth · +0
BUF
Buffalo
smooth · +0
2,062 km · ~3h 09m est.
Running clean · 1 airline · 1x weekly · nonstop
100 / 100
route health from live IAH and BUF delay boards
Flight time~3h 09mestimated from route distance
Weekly departures1x1 direct airline on the leg
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Delta Air Lines
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 daysAirports right now
live boardsWeather lens
Current conditions put the pressure at BUF: 38% 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 Houston to Buffalo route actually runs
Pro Flight Search records official board updates for nonstop IAH 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 — Houston (IAH) to Buffalo (BUF) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/IAH-BUF
IAH to BUF questions
Is IAH–BUF running on time right now?
Smooth skies ahead. Both endpoints currently score the same, route health score 100/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from IAH to BUF?
Great-circle distance is 2,062 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 176–207 min gate-to-gate on this route.
How often does IAH–BUF fly?
Delta Air Lines runs the route with about 1 flight a week (sat). Since one carrier owns the route, a single disruption tends to ripple through the day.
What does the route health score measure?
A blend of departure-side delay at IAH and arrival-side delay at BUF, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.
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