Flight number record
DL 2642
Delta Air Lines · Atlanta to Philadelphia
- Route
- ATL → PHL
- Departs
- 22:55
- Flights
- 362
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2642, check with Delta Air Lines.
DL 2642 lands a B−, level with the national rate of 77.3%. About one flight in four arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 362 flights, with a median arrival 3 minutes early.
Key figures
On time
76.6%
Arrivals under 15 minutes late, of 351 completed flights
Avg delay
55 min
Across delayed arrivals only, not all flights
Cancelled
3.04%
National rate is 1.89%
1 hour+ late
7.1%
National rate is 8.3%
These figures cover 362 flights between September 2025 and August 2026. The median arrival is 3 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 2642 flies
DL 2642 flies ATL to PHL without a single fixed slot. Its most common scheduled departure was 22:55, used on 137 of 362 flights, with 23:05 (52 flights) and 22:30 (38 flights) next.
- Departs 22:55137 flights37.8%
- Departs 23:0552 flights14.4%
- Departs 22:3038 flights10.5%
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 22:55 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 2642 runs 7 points better at 76.6%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
DL 2642 next to ATL to PHL
Every carrier on ATL to PHL combined arrived on time 74.6% of the time across 5,793 flights, so DL 2642 is 2 points ahead of it. Delta flew 3,020 flights on the same city pair under all its flight numbers, including this one, and those ran 76.2% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2642thin sample | 362 | 76.6% | 55 min | 3.04% | B− |
| All Delta Air Lines on ATL–PHL | 3,020 | 76.2% | 58 min | 3.11% | B− |
| All carriers on ATL–PHL | 5,793 | 74.6% | 81 min | 3.28% | C− |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2642 quarter by quarter
DL 2642 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Jul–Sep 2026 at 59.3%, a swing of 34 points on roughly 72 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 flights93.3%
- Oct–Dec 202589 flights82.8%
- Jan–Mar 202690 flights72.1%
- Apr–Jun 202691 flights80.9%
- Jul–Sep 202662 flights59.3%
Scale runs 50% to 100%.
By weekday, DL 2642 did best on Wednesday at 84.6% on time and worst on Monday at 69.2%. Each day rests on about 52 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2642 runs when it is late
The 82 late arrivals split 24 under half an hour, 33 between 30 and 60 minutes, and 25 an hour or more.
- 15+ min early70 flights19.9%
- Within 15 min199 flights56.7%
- 15–29 min late24 flights6.8%
- 30–59 min late33 flights9.4%
- 1–2 hours late20 flights5.7%
- 2+ hours late5 flights1.4%
Scale runs 0% to 100%.
Share of 351 completed flights by arrival against schedule.
14 of 85 late departures made up the time and arrived on time, 16% of them. 11 flights left on time and still arrived late.
The worst days
Worst days for DL 2642
The latest arrival of the period was on 14 June 2026, 3 hours 23 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 14 June 2026 | 3 hours 23 minutes | National Airspace System |
| 1 April 2026 | 3 hours 22 minutes | Late-arriving aircraft |
| 22 June 2026 | 3 hours 15 minutes | Late-arriving aircraft |
| 11 July 2026 | 2 hours 39 minutes | Late-arriving aircraft |
| 11 August 2026 | 2 hours 5 minutes | Extreme weather |
Delay causes
Why DL 2642 runs late
Carrier accounts for 44% of the 4,527 delay minutes carriers reported here, and the remaining four split what is left.
- 44%Carrier
- 39%Late-arriving aircraft
- 12%National Airspace System
- 5%Extreme weather
39% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,527 reported delay minutes here, that single category outweighs weather by 8 to one. The split is drawn from 4,527 delay minutes reported on DL 2642.
Cancellations run at 3.04%, against 1.89% nationally. That is roughly 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
7.1% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
The 666 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 362 flights under DL 2642 in the data flew ATL to PHL. 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. 362 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 2642
For a booking, the cancellation rate is the figure to plan around on DL 2642: 3.04% of its 362 scheduled flights did not operate. A late arrival costs about an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- ATL to PHL, every carrier and departure
- PHL to ATL, the return direction
- Delta Air Lines 2270 on the same route87.3%
- Delta Air Lines 1169 on the same route70.0%
- Frontier Airlines 2298 on the same route68.2%
- Delta Air Lines 1329 on the same route59.0%
- Delta Air Lines 2065 on the same route63.5%
- Frontier Airlines 1102 on the same route45.7%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Philadelphia International (PHL) 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
- Why the first flight of the morning is statistically safest
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.