73% of flights from Buffalo to Boston arrived on time over the past 12 months. That is worse than the typical U.S. route. The 7 a.m. departures ran on time 89% of the time; the 11 a.m. ones 76%. Most reliable airline: American Airlines (82%). 14% of flights arrived more than an hour late or not at all.
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for BUF → BOS: when a flight was late, it was under 45 minutes late 40% of the time. About 1 in 10 flights landed an hour or more late, and 1 in 61 three hours or more; 3.5% were cancelled outright.
- On time or early73%
- 15–30 min late5.7%
- 30–60 min late7.3%
- 1–2 hours late6.9%
- 2–3 hours late1.9%
- 3+ hours late1.6%
- Diverted0.0%
- Cancelled3.5%
Share of all 1,349 scheduled flights, past 12 months, by arrival time against schedule.
By airline
| Airline | Flights | On time | Cancelled | Typical arrival | 1h+ late | Avg when late | Operated by |
|---|---|---|---|---|---|---|---|
| JetBlue | 888 | 69% | 3.9% | −5 min | 12.0% | +78 min | JetBlue |
| American Airlines | 461 | 82% | 2.6% | −15 min | 7.4% | +82 min | Republic Airways 84%, Envoy 16% |
Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.
Best time of day to fly
On-time rate by scheduled departure hour (local time at BUF). Delays build through the day as late planes knock on, so early flights usually do best.
By airline and hour
| Departs | JetBlue |
|---|---|
| 6 a.m. | 77% |
| 7 a.m. | 90% |
| 10 a.m. | 75% |
Last flight of the day
On BUF → BOS, each airline's last flight of the day was cancelled 4.0% of the time, against 3.1% for its earlier flights (1.3× as often). It arrived 3+ hours late 2.3% of the time (earlier flights: 1.1%). It matters more than the numbers suggest. Miss an earlier flight and there's another one that evening; miss the last one and you're usually waiting until morning.
| Airline | Last departure | Last: cancelled | Last: 3h+ late | Earlier: cancelled | Next morning |
|---|---|---|---|---|---|
| American Airlines | 4:14 p.m. | 3.0% | 1.8% | 2.5% | first flight 7:00 a.m. |
| JetBlue | 9:33 p.m. | 4.6% | 2.6% | 3.4% | first flight 6:00 a.m. |
Last flight = the airline's last scheduled departure on this route that day, on days it flies the route at least twice; past 12 months. Times are typical scheduled times over the latest three months.
If you need to be in BOS tonight, book an earlier flight so there's a backup if it's cancelled.
By month
Each calendar month pooled over 2023–2026. Best: April (84%). Worst: January (64%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 212 | 71% | 5.2% |
| Tuesday | 192 | 71% | 5.2% |
| Wednesday | 181 | 76% | 2.2% |
| Thursday | 202 | 72% | 1.5% |
| Friday | 210 | 73% | 2.4% |
| Saturday | 149 | 80% | 2.7% |
| Sunday | 203 | 70% | 4.9% |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: weather 20 · air traffic/airport 16 · airline 11
Month by month
Flight numbers on this route
Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.
| Flight | Departs | Flights | On time | Cancelled | Typical arrival | Operated by |
|---|---|---|---|---|---|---|
| AA 4788 | 7:00 a.m. | 134 | 90% | 3.7% | −16 min | Republic Airways |
| B6 716 | 7:00 a.m. | 288 | 76% | 4.9% | −10 min | JetBlue |
| B6 516 | 9:33 p.m. | 170 | 49% | 5.3% | +13 min | JetBlue |
Worst days in the past year
| Date | Flights | On time | Cancelled |
|---|---|---|---|
| Jul 7, 2026 | 6 | 0% | 2 |
| Mar 22, 2026 | 4 | 0% | 0 |
| Oct 24, 2025 | 4 | 0% | 0 |
| Oct 31, 2025 | 3 | 0% | 0 |
| Sep 18, 2025 | 3 | 0% | 0 |
Nearby airport alternatives
Other ways to make the same trip, using airports within 60 miles of Buffalo or Boston. None has been clearly more reliable than BUF → BOS.
| Route | Flights | On time | Cancelled |
|---|---|---|---|
| BUF → BOS (this route) | 1,349 | 73% | 3.5% |
| ROC → BOS Frederick Douglass Greater Rochester to Boston Logan | 866 | 74% | 3.0% |
Questions
How often are flights from BUF to BOS on time?
73% of 1,349 scheduled flights from Buffalo, NY to Boston, MA arrived within 15 minutes of schedule between September 2025 and August 2026. 3.5% were cancelled.
What is the best time of day to fly BUF to BOS?
Flights scheduled to leave at 7 a.m. were the most reliable (89% on time). The 11 a.m. departures were the least (76%).
Which airline is most on time from BUF to BOS?
American Airlines: 82% of its 461 flights on the route arrived on time. JetBlue: 69%.
What month has the most delays from BUF to BOS?
January (64% on time). The best month is April (84%), over 2023–2026.
Is the last flight of the day from BUF to BOS more likely to be cancelled?
Yes. Each airline's last BUF–BOS flight of the day was cancelled 4.0% of the time over the past year, against 3.1% for its earlier flights. If the last flight is cancelled, the next one is usually the following morning.
Related
- BOS → BUF (return)
- Buffalo Niagara (BUF) delays by hour
- Flights into Boston Logan (BOS)
- JetBlue on-time record
- American Airlines on-time record
- Connecting off this flight? Check the risk
Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.