IAH to BUF flight delays & on-time performance
Nonstop flights from George Bush Intercontinental Airport to Buffalo Niagara International Airport · 1,281 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at IAH or BUF right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Houston (IAH) to Buffalo (BUF) arrived on time 0% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 50% were cancelled, and 100% arrived an hour or more late.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (100%).
Which airline is most on time from IAH to BUF?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| American Airlines | 0% | 0.0% | 204 min | 100.0% | 1 |
| United Airlines | – | 100.0% | – | – | 1 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
Not enough departures across different hours to compare.
Best day of the week
On-time arrival rate by day of departure.
- Monday–100.0% cancelled
- Friday0%0.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)100%
- Late-arriving aircraft0%
- Air traffic control & airport congestion0%
- Extreme weather0%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)100%
- Extreme weather0%
- Air traffic control & airport congestion0%
- Security0%
IAH to BUF: common questions
- How often are IAH to BUF flights on time?
- 0% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Houston to Buffalo cancelled?
- 50.0% of scheduled flights were cancelled (1 of 2).
- How long are typical delays?
- Across all flights the average arrival delay was 204 min (early arrivals count as zero). Flights that were late arrived 204 min behind schedule on average, and 100.0% of flights were an hour or more late.
- How long is taxi time at IAH?
- Flights on this route spent 20 min taxiing from the gate to takeoff on average.
Related routes
Return trip: BUF to IAH — 100% on time
More flights from Houston
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: IAH → BUF, nonstop flights by US airlines that report to the DOT. How we calculate this.