Carrier route record
YXBOS→JFK
Republic Airways · Boston to New York
- Flights
- 2,915
- Period
- July 2025 to June 2026
- Share of route
- 51%
- Carriers
- 3
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Republic Airways.
Republic on BOS to JFK carries a cancellation problem, not just a delay problem: 5.0% of scheduled flights never operate, against 1.8% nationally. Of the ones that do fly, close to three flights in four arrive on time, worth a B− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 2,915 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 368 at 90.8% on time.
The US average over the same twelve months is 77.6%, so there is little to separate Republic on BOS to JFK from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
75.1%
Arrivals under 15 minutes late, of 2,769 completed flights
Avg delay
66 min
Across delayed arrivals only, not all flights
Cancelled
5.01%
National rate is 1.81%
Whole route
75.5%
Every carrier on BOS to JFK, 5,738 flights
These figures cover 2,915 flights between July 2025 and June 2026. Beyond the headline rate, 9.8% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
Republic against every carrier on BOS to JFK
Republic flew 2,915 of the 5,738 flights on BOS to JFK, most of the route. Its 75.1% on time is about level with the route as a whole at 75.5%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Delta at 90.8% to JetBlue at 73.6%.
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 90.8% of the time; JetBlue Airways manages 73.6%. Sample sizes sit next to every figure, because a two-point gap across 2,455 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 368 | 90.8% | 63 min | 2.99% | A |
| Republic Airways (this page) | 2,915 | 75.1% | 66 min | 5.01% | B− |
| JetBlue Airways | 2,455 | 73.6% | 81 min | 4.24% | C− |
JetBlue Airways cancels 4.2% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Flight by flight
Republic flight numbers on BOS to JFK
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 32 points, against 17 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am363 flights94.9%
- 8am–11am481 flights88.2%
- 11am–2pm677 flights76.1%
- 2pm–5pm319 flights67.4%
- 5pm–8pm663 flights63.1%
- 8pm–5am412 flights64.1%
Scale runs 55% to 100%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 63.1% on time, against 94.9% 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 11am–2pm window is the busiest, with 677 flights scheduled in it.
Across the year
Republic on BOS to JFK through the year
July is the worst month at 64.4% on time, 17 points below August, the best at 81.6%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. March was the busiest month here, with 286 flights.
Across the week, Saturday is the strongest day at 80.9% on time and Sunday the weakest at 70.4%. 11 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Republic runs late on this route
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 45,000 reported delay minutes.
- 40%Late-arriving aircraft
- 37%National Airspace System
- 21%Carrier
- 2%Extreme weather
- 0%Security
40% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 45,000 reported delay minutes here, that single category outweighs weather by 21 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 45,492 reported delay minutes.
37% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 17,000 minutes out of 45,000, against a national NAS share of 21%.
Cancellations run at 5.01%, against 1.81% nationally. That is about one flight in twenty 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
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.8% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
At 187 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 runs 77.8% on time across 2,916 flights, within 3 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 2,915 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking Republic on BOS to JFK
Put together: the delay figures matter less here than the 5.01% cancellation rate. A late arrival costs you about 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. 2,769 completed flights over 12 months sit behind that.
Related
Where to go next
- BOS to JFK, every carrier
- Republic on JFK to BOS, the return leg
- Delta Air Lines on BOS to JFK90.8%
- JetBlue Airways on BOS to JFK73.6%
- Republic Airways network-wide record
- Boston Logan International (BOS) delay statistics
- John F. Kennedy International (JFK) delay statistics
- The US routes with the most cancellations
- Same route, different airline: where the carrier you pick matters most
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.