Route profile
BUF→BOS
Flight reliability, delays and best times to fly from Buffalo to Boston, 395 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 28% of comparable major US routes (4,598 compared)
Calculated from 3,260 flights. How this is calculated
BUF → BOS arrives on time 78.0% of the time; the return trip, BOS → BUF, arrives on time 76.9% of the time.
BUF → BOS spends 23.3 minutes on the ground on a 395-mile trip: 15.2 minutes from pushback to wheels-up at BUF and 8.1 minutes from touchdown to gate at BOS.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What sets this route apart
Where BUF to BOS differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
BUF to BOS struggles most at 1 PM: 66.5% of its flights scheduled then arrive on time, 11.9 points behind the 78.4% on routes of similar length at the same hour. Against all other routes the gap is 10.6 points.
In January, BUF to BOS runs 10.6 points below routes of similar length, 70.1% on time to 80.7%. Against all other routes the gap is 9 points.
May is kinder to BUF to BOS than to routes of similar length: 83.8% on time against 75.9%, 7.9 points better. Against all other routes the gap is 8.6 points.
JetBlue does better on BUF to BOS than on its routes of similar length: 77.2% on time here, 73.0% there, 4.2 points apart. Against all other routes the gap is 5 points.
BUF to BOS against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 1 PM departures | 66.5% | routes of similar length | 78.4% | −11.9 pts | 194 here, 95,178 there |
| Month: January | 70.1% | routes of similar length | 80.7% | −10.6 pts | 144 here, 114,408 there |
| Month: May | 83.8% | routes of similar length | 75.9% | +7.9 pts | 340 here, 133,586 there |
| Airline: JetBlue | 77.2% | routes of similar length | 73.0% | +4.2 pts | 2,789 here, 31,061 there |
Each comparison pools the flights of other routes, with this route’s own left out. Similar length means within 15% of this route’s 395 miles, with at least 5 such routes. A bucket is set against the most comparable group that has enough flights: similar length, then the same origin (at least 3 routes), then all other routes. Hours, weekdays and months appear only where both sides have 120 completed flights, and airlines where both have 600. The gap must be at least 2 points and 2 standard errors, and only the largest gap each way is kept per measure. These are differences in the flights counted, not causes.
Why BUF → BOS flights are cancelled
July 2023 – July 2026
BUF → BOS cancelled 66 of 3,260 scheduled flights — about 1 in every 49. The reason filed most often was extreme weather, 45.5% of the cancellations coded on this route — about 1 in every 109 scheduled flights.
Share of cancellations
Of 66 cancelled departures carrying a reason code.
What each reason means
Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.
30 cancellations, 45.5% of the total.
Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.
24 cancellations, 36.4% of the total.
Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.
12 cancellations, 18.2% of the total.
A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.
0 cancellations, 0.0% of the total.
Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. With only one or two carriers on the route, the split mostly reflects how they file. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.
66 coded cancellations were recorded on BUF → BOS; the section appears from 50.
When it goes wrong
July 2023 – July 2026
58 min late
against a median of 10 min early
BUF → BOS has an average that understates its risk: a typical arrival is 10 min early, but the worst tenth are 68 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 3,260 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at BOS after arriving from BUF.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 32% | Likely to miss |
| 45 min | 22% | High risk |
| 60 min | 17% | High risk |
| 90 min | 9.6% | Some risk |
| 120 min | 6.2% | Some risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 2.02% of the time and diverts 0.12% of the time, which a late arrival never shows up in.
Chance of missing is the share of 3,190 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 58 minutes late (90th-percentile gate arrival delay), over 3,260 operations.
Any other layover length: connection checker.
Best time to fly
BUF → BOS flights departing 5–9 AM arrived on time 88.9% of the time, against 61.4% for 6–9 PM departures, a gap of 27.5 percentage points.
By departure window
By departure hour
- 12 AM to 5 AM: too few flights to score
- 6 AM: 90.7% on time from 399 flights
- 7 AM: 90.7% on time from 455 flights
- 8 AM: 81.9% on time from 206 flights
- 9 AM: 87.0% on time from 192 flights
- 10 AM: 82.7% on time from 330 flights
- 11 AM: 82.8% on time from 231 flights
- 12 PM: too few flights to score
- 1 PM: 66.5% on time from 198 flights
- 2 PM: 66.1% on time from 197 flights
- 3 PM: 65.2% on time from 184 flights
- 4 PM: 71.9% on time from 144 flights
- 5 PM: 68.6% on time from 279 flights
- 6 PM: 58.6% on time from 215 flights
- 7 PM to 11 PM: too few flights to score
Departure windows with fewer than 120 flights are not scored.
Why BUF → BOS runs late
July 2023 – July 2026
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
crew, maintenance, boarding and fueling, all within the carrier’s control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for BUF → BOS. Only delays of 15 minutes or more are attributed.
Late-arriving aircraft is the largest cause on BUF → BOS, at 47.8%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 88.9% of the time and 6–9 PM departures 61.4%.
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| JetBlue | 2,850 | 77.2% | 2.00% | -9 min | 10.0% |
| Republic Airways | 307 | 85.6% | 2.61% | -15 min | 6.7% |
JetBlue flew 90.3% of the 3,157 flights listed.
Republic Airways arrived on time 8.4 percentage points more often than JetBlue on this route.
Flights on this route
Flight numbers with at least 600 operations here and still on the schedule.
| Flight | Scheduled | Operations | On time |
|---|---|---|---|
| B6716 JetBlue | 7:00 AM | 983 | 84.2% |
Weekly and seasonal patterns
By day of week
Saturday is historically the most reliable day and Friday the least, a gap of 8.1 percentage points.
By month
- Jan: 70.1%
- Feb: 75.5%
- Mar: 81.7%
- Apr: 84.7%
- May: 83.8%
- Jun: 79.0%
- Jul: 69.7%
- Aug: 79.7%
- Sep: 74.6%
- Oct: 80.9%
- Nov: 82.5%
- Dec: 72.9%
July is historically the weakest month and April the strongest, a spread of 15.0 percentage points.
Reliability over time
July 2023 – July 2026
- July 2023: too few flights to score (106)
- August 2023: too few flights to score (85)
- September 2023: too few flights to score (84)
- October 2023: too few flights to score (90)
- November 2023: too few flights to score (57)
- December 2023: too few flights to score (53)
- January 2024: too few flights to score (54)
- February 2024: too few flights to score (56)
- March 2024: too few flights to score (62)
- April 2024: too few flights to score (60)
- May 2024: too few flights to score (89)
- June 2024: too few flights to score (83)
- July 2024: too few flights to score (90)
- August 2024: too few flights to score (93)
- September 2024: too few flights to score (87)
- October 2024: too few flights to score (89)
- November 2024: too few flights to score (87)
- December 2024: too few flights to score (79)
- January 2025: too few flights to score (52)
- February 2025: too few flights to score (49)
- March 2025: too few flights to score (64)
- April 2025: too few flights to score (86)
- May 2025: too few flights to score (86)
- June 2025: too few flights to score (101)
- July 2025: 62.3% from 123 flights
- August 2025: 83.7% from 124 flights
- September 2025: too few flights to score (88)
- October 2025: too few flights to score (105)
- November 2025: too few flights to score (85)
- December 2025: too few flights to score (72)
- January 2026: too few flights to score (51)
- February 2026: too few flights to score (38)
- March 2026: too few flights to score (109)
- April 2026: too few flights to score (104)
- May 2026: 89.7% from 167 flights
- June 2026: 81.6% from 169 flights
- July 2026: 74.1% from 183 flights
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 76.2% against 80.5% in the 12 months before — declining by 4.3 percentage points.
Data and methodology
Calculated by FlyerIntel from 3,260 BUF → BOS flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed