Carrier route record
B6ATL→BOS
JetBlue Airways · Atlanta to Boston
- Flights
- 848
- Period
- July 2025 to June 2026
- Share of route
- 17%
- Carriers
- 4
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with JetBlue Airways.
JetBlue on ATL to BOS sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.6%. The late ones land an hour and a half behind schedule. That rests on 848 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 3,666 at 76.2% on time.
The national on-time rate over the same period is 77.6%, so JetBlue on ATL to BOS runs 6 points behind the country as a whole. Across a thousand flights that is about 64 extra late arrivals.
Key figures
On time
71.2%
Arrivals under 15 minutes late, of 825 completed flights
Avg delay
83 min
Across delayed arrivals only, not all flights
Cancelled
2.71%
National rate is 1.81%
Whole route
74.5%
Every carrier on ATL to BOS, 4,935 flights
These figures cover 848 flights between July 2025 and June 2026. Beyond the headline rate, 12.5% 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
JetBlue against every carrier on ATL to BOS
JetBlue flew 848 of the 4,935 flights on ATL to BOS, about 17% of it. Its 71.2% on time is 3 points worse than the route as a whole, which runs 74.5%. Ranked by on-time rate it is number two of four carriers on the route, where the range runs from Delta at 76.2% to Spirit at 61.9%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 76.2% of the time; Frontier Airlines manages 66.4%. Sample sizes sit next to every figure, because a two-point gap across 400 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 3,666 | 76.2% | 59 min | 1.72% | B |
| JetBlue Airways (this page) | 848 | 71.2% | 83 min | 2.71% | C |
| Frontier Airlines | 400 | 66.4% | 57 min | 2.50% | C |
| Spirit Airlinesthin sample | 21 | 61.9% | 57 min | 0.00% | D+ |
Delta leads Frontier by 10 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.
Flight by flight
JetBlue flight numbers on ATL to BOS
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 37 points, against 10 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am261 flights88.4%
- 8am–11am85 flights81.0%
- 11am–2pm221 flights65.6%
- 2pm–5pm71 flights68.7%
- 5pm–8pm109 flights51.4%
- 8pm–5am101 flights54.0%
Scale runs 45% to 95%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 51.4% on time, against 88.4% 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 5am–8am window is the busiest, with 261 flights scheduled in it.
Across the year
JetBlue on ATL to BOS through the year
April is the best month on the calendar at 80.0% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. July was the busiest month here, with 89 flights.
Across the week, Saturday is the strongest day at 79.2% on time and Sunday the weakest at 63.9%. 15 points is a smaller lever than departure hour, but it is free.
Delay causes
Why JetBlue 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 20,000 reported delay minutes.
- 42%Late-arriving aircraft
- 30%National Airspace System
- 28%Carrier
- 1%Extreme weather
- 0%Security
42% 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 20,000 reported delay minutes here, that single category outweighs weather by 42 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 19,751 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 88.4% on time here.
Cancellations run at 2.71%, against 1.81% nationally. That is about one flight in 40 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. 12.5% 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.
The 946 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg runs 69.6% on time across 850 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 848 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 ATL to BOS
Put together: treat all of this as provisional. 848 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 71.2% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 825 completed flights over 12 months sit behind that.
Related
Where to go next
- ATL to BOS, every carrier
- JetBlue on BOS to ATL, the return leg
- Delta Air Lines on ATL to BOS76.2%
- Frontier Airlines on ATL to BOS66.4%
- JetBlue Airways network-wide record
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Boston Logan International (BOS) delay statistics
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
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.