Flight number record
DL 2595
Delta Air Lines · Atlanta to Boston
- Route
- ATL → BOS
- Departs
- 14:59
- Flights
- 321
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2595, check with Delta Air Lines.
DL 2595 draws a D. Roughly one flight in three arrives at least 15 minutes late, and the typical late arrival is about an hour behind schedule. Build slack into anything you connect to. That rests on 321 flights, with a median arrival 3 minutes late.
The national on-time rate over the same period is 77.3%, so DL 2595 runs 15 points behind the country as a whole. Across a thousand flights that is about 148 extra late arrivals.
Key figures
On time
62.5%
Arrivals under 15 minutes late, of 317 completed flights
Avg delay
66 min
Across delayed arrivals only, not all flights
Cancelled
1.25%
National rate is 1.89%
1 hour+ late
13.9%
National rate is 8.3%
These figures cover 321 flights between September 2025 and August 2026. Beyond the headline rate, 13.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 2595 flies
DL 2595 flies ATL to BOS without a single fixed slot. Its most common scheduled departure was 14:59, used on 83 of 321 flights, with 15:15 (63 flights) and 15:25 (37 flights) next.
- Departs 14:5983 flights25.9%
- Departs 15:1563 flights19.6%
- Departs 15:2537 flights11.5%
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 14:59 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 2595 runs 9 points worse at 62.5%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 2595 next to ATL to BOS
Every carrier on ATL to BOS combined arrived on time 72.8% of the time across 5,054 flights, so DL 2595 is 10 points behind it. Delta flew 3,731 flights on the same city pair under all its flight numbers, including this one, and those ran 74.4% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 19 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2595thin sample | 321 | 62.5% | 66 min | 1.25% | D |
| All Delta Air Lines on ATL–BOS | 3,731 | 74.4% | 61 min | 1.82% | C |
| All carriers on ATL–BOS | 5,054 | 72.8% | 66 min | 2.30% | C |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2595 quarter by quarter
DL 2595 did not run the same all year. Its best quarter was Jan–Mar 2026 at 72.3% on time and its weakest Jul–Sep 2026 at 47.5%, a swing of 25 points on roughly 64 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 flights50.0%
- Oct–Dec 202553 flights67.9%
- Jan–Mar 202686 flights72.3%
- Apr–Jun 202691 flights64.4%
- Jul–Sep 202661 flights47.5%
Scale runs 40% to 80%.
By weekday, DL 2595 did best on Saturday at 74.4% on time and worst on Sunday at 51.1%. Each day rests on about 46 flights, so a gap of 23 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2595 runs when it is late
The 119 late arrivals split 37 under half an hour, 38 between 30 and 60 minutes, and 44 an hour or more.
- 15+ min early57 flights18.0%
- Within 15 min141 flights44.5%
- 15–29 min late37 flights11.7%
- 30–59 min late38 flights12.0%
- 1–2 hours late29 flights9.1%
- 2+ hours late15 flights4.7%
Scale runs 0% to 100%.
Share of 317 completed flights by arrival against schedule.
17 of 118 late departures made up the time and arrived on time, 14% of them. In the other direction, 18 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at BOS.
The worst days
Worst days for DL 2595
The latest arrival of the period was on 12 July 2026, 5 hours 5 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as national airspace system delay.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 12 July 2026 | 5 hours 5 minutes | Late-arriving aircraft |
| 20 October 2025 | 4 hours 34 minutes | National Airspace System |
| 7 February 2026 | 4 hours 34 minutes | National Airspace System |
| 18 June 2026 | 4 hours 34 minutes | National Airspace System |
| 19 July 2026 | 4 hours 3 minutes | Carrier |
Delay causes
Why DL 2595 runs late
National Airspace System accounts for 59% of the 7,869 delay minutes carriers reported here, and the remaining four split what is left.
- 59%National Airspace System
- 26%Carrier
- 12%Late-arriving aircraft
- 3%Extreme weather
59% 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 4,670 minutes out of 7,869, against a national NAS share of 21%. The split is drawn from 7,869 delay minutes reported on DL 2595.
Cancellations sit at 1.25% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
13.9% 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.
Every one of the 321 flights under DL 2595 in the data flew ATL to BOS. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 321 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 2595
For a booking, DL 2595 is a flight to put a long connection behind. 13.9% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- ATL to BOS, every carrier and departure
- BOS to ATL, the return direction
- Delta Air Lines 855 on the same route85.2%
- Delta Air Lines 865 on the same route80.2%
- Delta Air Lines 726 on the same route66.3%
- Delta Air Lines 821 on the same route69.2%
- Delta Air Lines 987 on the same route89.9%
- Delta Air Lines 350 on the same route74.6%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Boston Logan International (BOS) 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
- How often a connection fails at the major US hubs
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.