Carrier route record
B6BUF→BOS
JetBlue Airways · Buffalo to Boston
- Flights
- 888
- Period
- September 2025 to August 2026
- Share of route
- 66%
- Carriers
- 3
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with JetBlue Airways.
JetBlue on BUF to BOS carries a cancellation problem, not just a delay problem: 3.9% of scheduled flights never operate, against 1.9% nationally. Of the ones that do fly, about seven flights in ten arrive on time, worth a C− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 888 flights, with a median arrival 5 minutes early.
The national on-time rate over the same period is 77.3%, so JetBlue on BUF to BOS runs 6 points behind the country as a whole. Across a thousand flights that is about 59 extra late arrivals.
Key figures
On time
71.4%
Arrivals under 15 minutes late, of 853 completed flights
Avg delay
78 min
Across delayed arrivals only, not all flights
Cancelled
3.94%
National rate is 1.89%
Whole route
75.7%
Every carrier on BUF to BOS, 1,349 flights
These figures cover 888 flights between September 2025 and August 2026. Beyond the headline rate, 12.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Carrier by carrier
JetBlue against every carrier on BUF to BOS
JetBlue flew 888 of the 1,349 flights on BUF to BOS, most of the route. Its 71.4% on time is 4 points worse than the route as a whole, which runs 75.7%. Ranked by on-time rate it is last of three carriers on the route, where the range runs from Republic at 85.8% to JetBlue at 71.4%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Republic Airways | 386 | 85.8% | 75 min | 3.11% | A− |
| Envoy Airthin sample | 75 | 74.7% | 101 min | 0.00% | C+ |
| JetBlue Airways (this page) | 888 | 71.4% | 78 min | 3.94% | C− |
Flight by flight
JetBlue flight numbers on BUF to BOS
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When JetBlue runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 43 points, against half a point between the best and worst carrier.
- 5am–8am220 flights87.2%
- 8am–11am285 flights77.5%
- 11am–2pm113 flights63.6%
- 2pm–5pm85 flights65.9%
- 5pm–8pm105 flights54.9%
- 8pm–5am80 flights43.8%
Scale runs 35% to 95%.
The 8pm–5am window is where this operation falls apart: 43.8% on time, against 87.2% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 8am–11am window is the busiest, with 285 flights scheduled in it.
Across the year
JetBlue on BUF to BOS through the year
January is the weak month at 55.3% on time, against 87.5% in April. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. October was the busiest month here, with 105 flights.
Across the week, Saturday is the strongest day at 79.4% on time and Sunday the weakest at 67.2%, a spread of 12 points.
Arrival by arrival
How late JetBlue on BUF to BOS runs when it is late
JetBlue on BUF to BOS often beats the schedule: 252 of 853 completed flights, 30%, arrived 15 minutes or more early. The 244 late arrivals split 59 under half an hour, 76 between 30 and 60 minutes, and 109 an hour or more.
- 15+ min early252 flights29.5%
- Within 15 min357 flights41.9%
- 15–29 min late59 flights6.9%
- 30–59 min late76 flights8.9%
- 1–2 hours late73 flights8.6%
- 2+ hours late36 flights4.2%
Scale runs 0% to 100%.
Share of 853 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 232 departures that left 15 minutes late or more, only 21 made it up before arrival. 33 flights left on time and still arrived late.
The worst days
Worst days for JetBlue on BUF to BOS
The latest arrival of the period was on 11 March 2026, 20 hours 13 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 11 March 2026 | 20 hours 13 minutes | Late-arriving aircraft |
| 10 November 2025 | 8 hours 12 minutes | Late-arriving aircraft |
| 7 January 2026 | 5 hours 57 minutes | Late-arriving aircraft |
| 6 July 2026 | 5 hours 44 minutes | Carrier |
| 5 December 2025 | 4 hours 41 minutes | Late-arriving aircraft |
Delay causes
Why JetBlue runs late on this route
Late-arriving aircraft accounts for 54% of the 19,000 delay minutes carriers reported here, and the remaining four split what is left.
- 54%Late-arriving aircraft
- 28%National Airspace System
- 19%Carrier
- 0%Extreme weather
54% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 19,000 reported delay minutes here, that single category outweighs weather by 54 to one. The split is drawn from 19,124 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 87.2% on time here.
Cancellations run at 3.94%, against 1.89% nationally. That is about one flight in 25 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here costs
12.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 395 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 5am–8am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 68.2% on time across 887 flights, 3 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 3 points of difference.
One caution: this is a thin sample. 888 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking JetBlue on BUF to BOS
Put together: the delay figures matter less here than the 3.94% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 853 completed flights over 12 months sit behind that.
Related
Where to go next
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.