Carrier route record
B6ATL→BOS
JetBlue Airways · Atlanta to Boston
- Flights
- 857
- Period
- September 2025 to August 2026
- Share of route
- 17%
- Carriers
- 4
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with JetBlue Airways.
JetBlue on ATL to BOS carries a cancellation problem, not just a delay problem: 4.1% 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 857 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 3,731 at 74.4% on time.
The national on-time rate over the same period is 77.3%, so JetBlue on ATL to BOS runs 8 points behind the country as a whole. Across a thousand flights that is about 81 extra late arrivals.
Key figures
On time
69.2%
Arrivals under 15 minutes late, of 822 completed flights
Avg delay
92 min
Across delayed arrivals only, not all flights
Cancelled
4.08%
National rate is 1.89%
Whole route
72.8%
Every carrier on ATL to BOS, 5,054 flights
These figures cover 857 flights between September 2025 and August 2026. Beyond the headline rate, 13.0% 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 ATL to BOS
JetBlue flew 857 of the 5,054 flights on ATL to BOS, about 17% of it. Its 69.2% on time is 4 points worse than the route as a whole, which runs 72.8%. Ranked by on-time rate it is number two of four carriers on the route, where the range runs from Delta at 74.4% to Spirit at 61.5%. 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 74.4% of the time; Frontier Airlines manages 67.3%. Sample sizes sit next to every figure, because a two-point gap across 453 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 3,731 | 74.4% | 61 min | 1.82% | C |
| JetBlue Airways (this page) | 857 | 69.2% | 92 min | 4.08% | C− |
| Frontier Airlines | 453 | 67.3% | 54 min | 2.87% | C |
| Spirit Airlinesthin sample | 13 | 61.5% | 57 min | 0.00% | D+ |
Delta leads Frontier by 7 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
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 37 points, against 7 points between the best and worst carrier.
- 5am–8am266 flights84.1%
- 8am–11am85 flights81.0%
- 11am–2pm221 flights64.8%
- 2pm–5pm63 flights69.5%
- 5pm–8pm162 flights47.0%
- 8pm–5am60 flights61.7%
Scale runs 40% to 90%.
The 5pm–8pm window is where this operation falls apart: 47.0% on time, against 84.1% 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 266 flights scheduled in it.
Across the year
JetBlue on ATL to BOS through the year
July is the worst month at 50.0% on time, 30 points below April, the best at 80.0%. 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. August was the busiest month here, with 88 flights.
Across the week, Saturday is the strongest day at 74.0% on time and Sunday the weakest at 61.0%, a spread of 13 points.
Arrival by arrival
How late JetBlue on ATL to BOS runs when it is late
JetBlue on ATL to BOS often beats the schedule: 208 of 822 completed flights, 25%, arrived 15 minutes or more early. The 253 late arrivals split 60 under half an hour, 86 between 30 and 60 minutes, and 107 an hour or more.
- 15+ min early208 flights25.3%
- Within 15 min361 flights43.9%
- 15–29 min late60 flights7.3%
- 30–59 min late86 flights10.5%
- 1–2 hours late57 flights6.9%
- 2+ hours late50 flights6.1%
Scale runs 0% to 100%.
Share of 822 completed flights by arrival against schedule.
32 of 254 late departures made up the time and arrived on time, 13% of them. 31 flights left on time and still arrived late.
The worst days
Worst days for JetBlue on ATL to BOS
The latest arrival of the period was on 21 July 2026, 19 hours 15 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 21 July 2026 | 19 hours 15 minutes | Carrier |
| 31 March 2026 | 16 hours 30 minutes | Carrier |
| 28 April 2026 | 14 hours 20 minutes | Late-arriving aircraft |
| 29 November 2025 | 12 hours 31 minutes | Late-arriving aircraft |
| 28 September 2025 | 9 hours 52 minutes | Late-arriving aircraft |
Delay causes
Why JetBlue runs late on this route
Late-arriving aircraft accounts for 43% of the 23,000 delay minutes carriers reported here, and the remaining four split what is left.
- 43%Late-arriving aircraft
- 30%Carrier
- 26%National Airspace System
- 1%Extreme weather
- 0%Security
43% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 23,000 reported delay minutes here, that single category outweighs weather by 43 to one. The split is drawn from 23,263 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 84.1% on time here.
Cancellations run at 4.08%, 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
13.0% 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.
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.
The return leg runs 66.9% on time across 859 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. 857 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: the delay figures matter less here than the 4.08% cancellation rate. A late arrival costs you an hour and a half; 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. 822 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 BOS74.4%
- Frontier Airlines on ATL to BOS67.3%
- 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.