Carrier route record
B6BOS→ATL
JetBlue Airways · Boston to Atlanta
- Flights
- 850
- 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 BOS to ATL sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 8 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 850 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 3,662 at 82.1% on time.
The national on-time rate over the same period is 77.6%, so JetBlue on BOS to ATL runs 8 points behind the country as a whole. Across a thousand flights that is about 80 extra late arrivals.
Key figures
On time
69.6%
Arrivals under 15 minutes late, of 828 completed flights
Avg delay
63 min
Across delayed arrivals only, not all flights
Cancelled
2.35%
National rate is 1.81%
Whole route
78.5%
Every carrier on BOS to ATL, 4,931 flights
These figures cover 850 flights between July 2025 and June 2026. Beyond the headline rate, 12.3% 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 BOS to ATL
JetBlue flew 850 of the 4,931 flights on BOS to ATL, about 17% of it. Its 69.6% on time is 9 points worse than the route as a whole, which runs 78.5%. Ranked by on-time rate it is number three of four carriers on the route, where the range runs from Delta at 82.1% to Frontier at 65.2%. 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 82.1% of the time; Frontier Airlines manages 65.2%. Sample sizes sit next to every figure, because a two-point gap across 399 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 3,662 | 82.1% | 75 min | 1.77% | B |
| Spirit Airlinesthin sample | 20 | 70.0% | 61 min | 0.00% | C+ |
| JetBlue Airways (this page) | 850 | 69.6% | 63 min | 2.35% | C |
| Frontier Airlines | 399 | 65.2% | 52 min | 3.26% | C− |
Frontier Airlines cancels 3.3% 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
JetBlue flight numbers on BOS to ATL
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 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–8am76 flights78.4%
- 8am–11am244 flights86.7%
- 11am–2pm48 flights76.6%
- 2pm–5pm153 flights68.0%
- 5pm–8pm257 flights54.4%
- 8pm–5am72 flights54.4%
Scale runs 45% to 90%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 54.4% on time, against 86.7% for the 8am–11am 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 5pm–8pm window is the busiest, with 257 flights scheduled in it.
Across the year
JetBlue on BOS to ATL through the year
December is the weak month at 50.0% on time, against 86.0% in October. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. July was the busiest month here, with 89 flights.
Across the week, Tuesday is the strongest day at 78.6% on time and Sunday the weakest at 55.9%. 23 points is a smaller lever than departure hour, but it is free.
Delay causes
Why JetBlue runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 47% of the 16,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 47%Late-arriving aircraft
- 26%National Airspace System
- 25%Carrier
- 1%Extreme weather
47% 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 16,000 reported delay minutes here, that single category outweighs weather by 37 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 15,855 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 86.7% on time here.
Cancellations sit at 2.35% against a national 1.81%, which is ordinary. Diversions add another 0.24%.
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. 12.3% 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 71.2% on time across 848 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. 850 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 BOS to ATL
Put together: treat all of this as provisional. 850 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 69.6% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 828 completed flights over 12 months sit behind that.
Related
Where to go next
- BOS to ATL, every carrier
- JetBlue on ATL to BOS, the return leg
- Delta Air Lines on BOS to ATL82.1%
- Frontier Airlines on BOS to ATL65.2%
- JetBlue Airways network-wide record
- Boston Logan International (BOS) delay statistics
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Why the first flight of the morning is statistically safest
- 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.