71% of flights from Boston to Buffalo arrived on time over the past 12 months. That is worse than the typical U.S. route. The 11 a.m. departures ran on time 87% of the time; the 5 p.m. ones 49%. Most reliable airline: American Airlines (81%). 15% 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 BOS → BUF: when a flight was late, it was under 45 minutes late 42% of the time. About 1 in 8 flights landed an hour or more late, and 1 in 52 three hours or more; 3.6% were cancelled outright.
- On time or early71%
- 15–30 min late6.6%
- 30–60 min late7.3%
- 1–2 hours late7.4%
- 2–3 hours late2.4%
- 3+ hours late1.9%
- Diverted0.0%
- Cancelled3.6%
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 | 887 | 66% | 4.0% | −5 min | 14.5% | +76 min | JetBlue |
| American Airlines | 462 | 81% | 2.8% | −17 min | 6.5% | +72 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 BOS). Delays build through the day as late planes knock on, so early flights usually do best.
By airline and hour
| Departs | JetBlue |
|---|---|
| 8 a.m. | 71% |
| 5 p.m. | 49% |
Last flight of the day
On BOS → BUF, each airline's last flight of the day was cancelled 5.7% of the time, against 2.2% for its earlier flights (2.6× as often). It arrived 3+ hours late 3.2% 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 | 8:00 p.m. | 6.6% | 2.4% | 0.7% | first flight 9:03 a.m. |
| JetBlue | 10:10 p.m. | 5.3% | 3.6% | 3.1% | first flight 8:04 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 BUF 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 (87%). Worst: January (60%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 212 | 67% | 7.5% |
| Tuesday | 184 | 72% | 4.9% |
| Wednesday | 183 | 74% | 1.1% |
| Thursday | 205 | 68% | 1.9% |
| Friday | 201 | 74% | 2.0% |
| Saturday | 150 | 76% | 3.3% |
| Sunday | 214 | 67% | 3.7% |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: weather 21 · air traffic/airport 19 · airline 8
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 |
|---|---|---|---|---|---|---|
| B6 1115 | 5:40 p.m. | 181 | 60% | 3.3% | +2 min | JetBlue |
| B6 715 | 10:10 p.m. | 300 | 60% | 5.3% | 0 min | JetBlue |
Worst days in the past year
| Date | Flights | On time | Cancelled |
|---|---|---|---|
| Mar 16, 2026 | 4 | 0% | 1 |
| Dec 4, 2025 | 3 | 0% | 0 |
| Nov 7, 2025 | 3 | 0% | 0 |
| Sep 7, 2025 | 3 | 0% | 0 |
| Dec 14, 2025 | 3 | 0% | 1 |
Nearby airport alternatives
Other ways to make the same trip, using airports within 60 miles of Boston or Buffalo. BOS → ROC has been 4 points more reliable.
| Route | Flights | On time | Cancelled |
|---|---|---|---|
| BOS → BUF (this route) | 1,349 | 71% | 3.6% |
| BOS → ROC Boston Logan to Frederick Douglass Greater Rochester | 867 | 74% | 3.7% |
Questions
How often are flights from BOS to BUF on time?
71% of 1,349 scheduled flights from Boston, MA to Buffalo, NY arrived within 15 minutes of schedule between September 2025 and August 2026. 3.6% were cancelled.
What is the best time of day to fly BOS to BUF?
Flights scheduled to leave at 11 a.m. were the most reliable (87% on time). The 5 p.m. departures were the least (49%).
Which airline is most on time from BOS to BUF?
American Airlines: 81% of its 462 flights on the route arrived on time. JetBlue: 66%.
What month has the most delays from BOS to BUF?
January (60% on time). The best month is April (87%), over 2023–2026.
Is the last flight of the day from BOS to BUF more likely to be cancelled?
Yes. Each airline's last BOS–BUF flight of the day was cancelled 5.7% of the time over the past year, against 2.2% for its earlier flights. If the last flight is cancelled, the next one is usually the following morning.
Related
- BUF → BOS (return)
- Boston Logan (BOS) delays by hour
- Flights into Buffalo Niagara (BUF)
- 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.