Carrier route record
YXBOS→BUF
Republic Airways · Boston to Buffalo
- Flights
- 386
- Period
- September 2025 to August 2026
- Share of route
- 29%
- Carriers
- 3
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Republic Airways.
Republic on BOS to BUF lands a B−, 6 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 386 flights, with a median arrival 18 minutes early.
Set against the rest of the country, Republic's BOS to BUF record is 6 points better than the US average of 77.3%. That gap is worth roughly 55 fewer late arrivals for every thousand flights.
Key figures
On time
82.8%
Arrivals under 15 minutes late, of 373 completed flights
Avg delay
72 min
Across delayed arrivals only, not all flights
Cancelled
3.37%
National rate is 1.89%
Whole route
73.3%
Every carrier on BOS to BUF, 1,349 flights
These figures cover 386 flights between September 2025 and August 2026. The median arrival is 18 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Carrier by carrier
Republic against every carrier on BOS to BUF
Republic flew 386 of the 1,349 flights on BOS to BUF, about 29% of it. Its 82.8% on time is 10 points better than the route as a whole, which runs 73.3%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Envoy at 84.2% to JetBlue at 68.2%. 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 |
|---|---|---|---|---|---|
| Envoy Airthin sample | 76 | 84.2% | 75 min | 0.00% | B+ |
| Republic Airways (this page) | 386 | 82.8% | 72 min | 3.37% | B− |
| JetBlue Airways | 887 | 68.2% | 76 min | 3.95% | C− |
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 Republic runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 20 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am138 flights89.7%
- 11am–2pm11 flights—
- 2pm–5pm102 flights87.3%
- 5pm–8pm47 flights71.1%
- 8pm–5am88 flights69.6%
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 89.7% of the time, against 69.6% for the overnight window. That is 20 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 138 flights scheduled in it.
Across the year
Republic on BOS to BUF through the year
- Apr–Jun 2026221 flights83.9%
- Jul–Sep 2026165 flights81.3%
Scale runs 75% to 90%.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 82.8% on time across 386 flights.
Split by quarter, Republic on BOS to BUF logged 221 flights in Apr–Jun 2026 and 165 flights in Jul–Sep 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 82.8% annual figure is the one to use.
Across the week, Saturday is the strongest day at 88.6% on time and Wednesday the weakest at 78.3%, a spread of 10 points.
Arrival by arrival
How late Republic on BOS to BUF runs when it is late
Republic on BOS to BUF often beats the schedule: 212 of 373 completed flights, 57%, arrived 15 minutes or more early. The 64 late arrivals split 15 under half an hour, 23 between 30 and 60 minutes, and 26 an hour or more.
- 15+ min early212 flights56.8%
- Within 15 min97 flights26.0%
- 15–29 min late15 flights4.0%
- 30–59 min late23 flights6.2%
- 1–2 hours late14 flights3.8%
- 2+ hours late12 flights3.2%
Scale runs 0% to 100%.
Share of 373 completed flights by arrival against schedule.
11 of 70 late departures made up the time and arrived on time, 16% of them. Only 5 left on time and still arrived late.
The worst days
Worst days for Republic on BOS to BUF
The latest arrival of the period was on 9 July 2026, 4 hours 23 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in July 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 9 July 2026 | 4 hours 23 minutes | Late-arriving aircraft |
| 5 August 2026 | 4 hours 22 minutes | Late-arriving aircraft |
| 9 August 2026 | 4 hours 10 minutes | Late-arriving aircraft |
| 27 July 2026 | 3 hours 41 minutes | Late-arriving aircraft |
| 5 July 2026 | 3 hours 2 minutes | Carrier |
Delay causes
Why Republic runs late on this route
Late-arriving aircraft accounts for 75% of the 4,596 delay minutes carriers reported here, and the remaining four split what is left.
- 75%Late-arriving aircraft
- 19%Carrier
- 6%National Airspace System
75% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,596 reported delay minutes here, that single category outweighs weather by 75 to one. The split is drawn from 4,596 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 89.7% on time here.
Cancellations run at 3.37%, against 1.89% nationally. That is about one flight in 30 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
7.0% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
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 8am–11am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 85.8% on time across 386 flights, 3 points above 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. 386 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 Republic on BOS to BUF
Put together: the delay figures matter less here than the 3.37% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 8am–11am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 373 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.