Boston (BOS) to Buffalo (BUF): On-Time Performance
Data through July 2026
When you fly BOS to BUF matters as much as anything else about the booking: the route swung from 94% on-time in April 2025 to just 53% in December 2025. Across the full period the route averages 78% on-time against a national 78%. Morning departures also hold up better than evening ones (87% vs 66%), which matters most in the rough months.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 2.0%
- Flights/day
- 3.5
- last 12 months
- Duration
- 1h 39m
- scheduled
- Distance
- 395 mi
Best airline from BOS to BUF
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 84% | 11 min | 2.6% | 305 |
| Envoy Air | 83% | 13 min | 0.0% | 72 |
| JetBlue Airways | 77% | 18 min | 2.0% | 2,003 |
Monthly on-time trend
Best time to fly from BOS to BUF
Aim for departures around 2 p.m. (90% on-time); avoid 10 p.m. departures (55%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 76% | 19 min |
| Tuesday | 82% | 11 min |
| Wednesday | 80% | 16 min |
| Thursday | 74% | 21 min |
| Friday | 77% | 17 min |
| Saturdaybest | 83% | 11 min |
| Sunday | 74% | 21 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft58%
- Airline operations29%
- National airspace system10%
- Weather3%
Frequently asked questions
- How often are flights from BOS to BUF delayed?
- 22% of BOS–BUF flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 17 minutes.
- Which airline is most reliable from BOS to BUF?
- Republic Airways has the best on-time record on this route at 84%, based on 305 flights. 3 airlines flew BOS–BUF frequently enough to compare in this period.
- What is the best time of day to fly from BOS to BUF?
- Departures around 2 p.m. have the best record (90% on-time), while departures around 10 p.m. have the worst (55%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from BOS to BUF?
- The scheduled BOS–BUF flight time averages 1h 39m over 395 miles. Actual arrival times vary — flights on this route land 15+ minutes late 22% of the time.
- How often are BOS to BUF flights cancelled?
- 2% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from BOS to BUF?
- December 2025 was the roughest month in this dataset, with only 53% of arrivals on time. The best was April 2025 at 94%. If your dates are flexible, that 41-point gap is worth planning around.
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Based on 2,380 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.