Flight number record
DL 2611
Delta Air Lines · Boston to New York
- Route
- BOS → JFK
- Departs
- 06:00
- Flights
- 349
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2611, check with Delta Air Lines.
DL 2611 earns an A−. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 15 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 349 flights, with a median arrival 14 minutes early.
Set against the rest of the country, DL 2611's record is 15 points better than the US average of 77.3%. That gap is worth roughly 150 fewer late arrivals for every thousand flights.
Key figures
On time
92.3%
Arrivals under 15 minutes late, of 338 completed flights
Avg delay
82 min
Across delayed arrivals only, not all flights
Cancelled
3.15%
National rate is 1.89%
1 hour+ late
3.0%
National rate is 8.3%
These figures cover 349 flights between September 2025 and August 2026. The median arrival is 14 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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Schedule
When DL 2611 flies
DL 2611 flies BOS to JFK without a single fixed slot. Its most common scheduled departure was 06:00, used on 187 of 349 flights, with 06:05 (132 flights) next.
- Departs 06:00187 flights53.6%
- Departs 06:05132 flights37.8%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 2611 runs 3 points better at 92.3%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 2611 next to BOS to JFK
Every carrier on BOS to JFK combined arrived on time 74.2% of the time across 5,614 flights, so DL 2611 is 18 points ahead of it. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2611thin sample | 349 | 92.3% | 82 min | 3.15% | A− |
| All Delta Air Lines on BOS–JFK | 368 | 91.6% | 75 min | 3.26% | A− |
| All carriers on BOS–JFK | 5,614 | 74.2% | 71 min | 5.58% | C− |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2611 quarter by quarter
DL 2611 did not run the same all year. Its best quarter was Apr–Jun 2026 at 97.8% on time and its weakest Oct–Dec 2025 at 86.1%, a swing of 12 points on roughly 70 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights90.0%
- Oct–Dec 202580 flights86.1%
- Jan–Mar 202686 flights91.5%
- Apr–Jun 202691 flights97.8%
- Jul–Sep 202662 flights94.8%
Scale runs 80% to 100%.
By weekday, DL 2611 ranged from 87.5% on Tuesday to 97.9% on Sunday. With about 50 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 2611 runs when it is late
DL 2611 often beats the schedule: 153 of 338 completed flights, 45%, arrived 15 minutes or more early. Most of the lateness is short. 13 of the 26 late arrivals were under half an hour behind, and 10 reached an hour or more.
- 15+ min early153 flights45.3%
- Within 15 min159 flights47.0%
- 15–29 min late13 flights3.8%
- 30–59 min late3 flights0.9%
- 1–2 hours late5 flights1.5%
- 2+ hours late5 flights1.5%
Scale runs 0% to 100%.
Share of 338 completed flights by arrival against schedule.
4 of 25 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 DL 2611
The latest arrival of the period was on 11 October 2025, 9 hours 15 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On four of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 11 October 2025 | 9 hours 15 minutes | Late-arriving aircraft |
| 24 August 2026 | 4 hours 26 minutes | Carrier |
| 7 July 2026 | 3 hours 6 minutes | Carrier |
| 31 August 2026 | 2 hours 30 minutes | Carrier |
| 24 October 2025 | 2 hours 4 minutes | Carrier |
Delay causes
Why DL 2611 runs late
Carrier accounts for 62% of the 2,124 delay minutes carriers reported here, and the remaining four split what is left.
- 62%Carrier
- 25%Late-arriving aircraft
- 11%National Airspace System
- 1%Extreme weather
The largest share of delay minutes, 62%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,314 of the 2,124 delay minutes reported here. The split is drawn from 2,124 delay minutes reported on DL 2611.
Cancellations run at 3.15%, 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 routes
What a delay on this flight costs
Badly late arrivals are rare here: only 3.0% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The same number turns up on one other city pair in the data, including BNA to MSP (16), but none flew often enough under DL 2611 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to BOS to JFK only.
One caution: this is a thin sample. 349 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 DL 2611
For a booking, the cancellation rate is the figure to plan around on DL 2611: 3.15% of its 349 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- BOS to JFK, every carrier and departure
- JFK to BOS, the return direction
- Republic Airways 5720 on the same route85.1%
- JetBlue Airways 717 on the same route60.3%
- Republic Airways 5808 on the same route73.8%
- JetBlue Airways 1017 on the same route64.9%
- JetBlue Airways 517 on the same route66.0%
- Republic Airways 5814 on the same route63.2%
- Boston Logan International (BOS) delay statistics
- John F. Kennedy International (JFK) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- What a cancellation rate actually tells you (and what it hides)
A flight number here means Delta Air Lines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
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.