Flight number record
DL 2402
Delta Air Lines · Detroit to Philadelphia
- Route
- DTW → PHL
- Departs
- 21:30
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2402, check with Delta Air Lines.
DL 2402 lands a B, 3 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 364 flights, with a median arrival 11 minutes early.
Key figures
On time
80.5%
Arrivals under 15 minutes late, of 354 completed flights
Avg delay
65 min
Across delayed arrivals only, not all flights
Cancelled
2.75%
National rate is 1.89%
1 hour+ late
7.6%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. The median arrival is 11 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 2402 flies
DL 2402 flies DTW to PHL without a single fixed slot. Its most common scheduled departure was 21:30, used on 73 of 364 flights, with 21:37 (62 flights) and 21:35 (57 flights) next.
- Departs 21:3073 flights20.1%
- Departs 21:3762 flights17.0%
- Departs 21:3557 flights15.7%
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 21:30 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 2402 runs 10 points better at 80.5%. 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 2402 next to DTW to PHL
Every carrier on DTW to PHL combined arrived on time 78.4% of the time across 3,000 flights, so DL 2402 is 2 points ahead of it. Delta flew 1,582 flights on the same city pair under all its flight numbers, including this one, and those ran 80.1% on time. Across its whole network Delta Air Lines managed 81.1%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2402thin sample | 364 | 80.5% | 65 min | 2.75% | B |
| All Delta Air Lines on DTW–PHL | 1,582 | 80.1% | 79 min | 2.40% | B |
| All carriers on DTW–PHL | 3,000 | 78.4% | 99 min | 3.87% | B− |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2402 quarter by quarter
DL 2402 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Jul–Sep 2026 at 73.7%, a swing of 23 points on roughly 73 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 flights96.7%
- Oct–Dec 202592 flights80.4%
- Jan–Mar 202690 flights76.7%
- Apr–Jun 202691 flights83.1%
- Jul–Sep 202661 flights73.7%
Scale runs 65% to 100%.
By weekday, DL 2402 did best on Saturday at 86.0% on time and worst on Tuesday at 70.6%. 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 2402 runs when it is late
DL 2402 often beats the schedule: 139 of 354 completed flights, 39%, arrived 15 minutes or more early. The 69 late arrivals split 19 under half an hour, 23 between 30 and 60 minutes, and 27 an hour or more.
- 15+ min early139 flights39.3%
- Within 15 min146 flights41.2%
- 15–29 min late19 flights5.4%
- 30–59 min late23 flights6.5%
- 1–2 hours late17 flights4.8%
- 2+ hours late10 flights2.8%
Scale runs 0% to 100%.
Share of 354 completed flights by arrival against schedule.
9 of 69 late departures made up the time and arrived on time, 13% of them. 9 flights left on time and still arrived late.
The worst days
Worst days for DL 2402
The latest arrival of the period was on 9 June 2026, 4 hours 9 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in December 2025.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 9 June 2026 | 4 hours 9 minutes | Late-arriving aircraft |
| 29 December 2025 | 3 hours 13 minutes | Carrier |
| 11 June 2026 | 2 hours 47 minutes | Carrier |
| 14 December 2025 | 2 hours 46 minutes | Carrier |
| 1 December 2025 | 2 hours 42 minutes | Late-arriving aircraft |
Delay causes
Why DL 2402 runs late
Carrier accounts for 44% of the 4,460 delay minutes carriers reported here, and the remaining four split what is left.
- 44%Carrier
- 36%Late-arriving aircraft
- 20%National Airspace System
- 0%Extreme weather
36% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,460 reported delay minutes here, that single category outweighs weather by 36 to one. The split is drawn from 4,460 delay minutes reported on DL 2402.
Cancellations run at 2.75%, against 1.89% nationally. That is roughly one flight in 40 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
7.6% 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.
Every one of the 364 flights under DL 2402 in the data flew DTW 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. 364 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 2402
For a booking, the cancellation rate is the figure to plan around on DL 2402: 2.75% of its 364 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
- DTW to PHL, every carrier and departure
- PHL to DTW, the return direction
- Delta Air Lines 2968 on the same route88.5%
- Detroit Metropolitan Wayne County (DTW) 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.