Buffalo (BUF) to Washington (IAD): On-Time Performance
Data through May 2026
Buffalo (BUF) to Washington (IAD) is a thinner route than most in this dataset — 124 departures over the past year, roughly 2 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 86% arrived on time, comfortably above the national average of 78%.
- On-time
- 86%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 1.2%
- Flights/day
- 0.34
- last 12 months
- Duration
- 1h 19m
- scheduled
- Distance
- 283 mi
Monthly on-time trend
Best time to fly from BUF to IAD
Departure time makes little difference on this route — on-time rates stay within a few points across the day.
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 87% | 33 min |
| Tuesday | 90% | 4 min |
| Wednesday | 78% | 30 min |
| Thursday | 87% | 6 min |
| Fridaybest | 91% | 8 min |
| Saturday | 84% | 13 min |
| Sunday | 85% | 13 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft40%
- Airline operations50%
- National airspace system8%
- Weather2%
Frequently asked questions
- How often are flights from BUF to IAD delayed?
- 14% of BUF–IAD flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 15 minutes.
- What is the best time of day to fly from BUF to IAD?
- Departures around 10 a.m. have the best record (87% on-time), while departures around 6 a.m. have the worst (85%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from BUF to IAD?
- The scheduled BUF–IAD flight time averages 1h 19m over 283 miles. Actual arrival times vary — flights on this route land 15+ minutes late 14% of the time.
- How often are BUF to IAD flights cancelled?
- 1.2% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What day of the week is most reliable for BUF to IAD?
- Friday flights have the best record at 91% on-time. Day-of-week differences on this route are meaningful — Wednesday trails at 78%.
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Based on 250 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.