Flight profile · Delta Air Lines
DL2331
Detroit (DTW) to Philadelphia (PHL) · scheduled 10:15 AM – 11:41 AM
How DL2331 performs
94 operations, 2026-03-08 to 2026-06-30.
DL2331 arrived on time 89.1% of the time, against 80.9% for all DTW → PHL flights — this specific departure is 8.2 percentage points better than the route as a whole. Against Delta Air Lines’s own flights on this route it is 6.3 points better.
Source: US DOT Bureau of Transportation Statistics · 94 operations between 2026-03-08 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL2331 | 89.1% | 2.13% | -13 min | 2.2% | 94 |
| Delta Air Lines on DTW → PHL | 82.8% | 1.18% | -11 min | 7.2% | 4,317 |
| All DTW → PHL flights | 80.9% | 2.20% | -10 min | 8.0% | 9,057 |
Source: FlyerIntel analysis of US DOT BTS data · 2026-03-08 to 2026-06-30
Other routes DL2331 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| PHL→DTW Philadelphia to Detroit | 2026-03-08 – 2026-06-30 | 94 | 91.2% |
| LGA→FLL New York to Fort Lauderdale | 2026-02-14 – 2026-02-14 | 1 | — |
| ATL→JAX Atlanta to Jacksonville | 2023-07-01 – 2026-02-11 | 875 | 72.3% |
| JAX→ATL Jacksonville to Atlanta | 2023-07-09 – 2026-02-09 | 443 | 79.9% |
| TYS→ATL Knoxville/Maryville to Atlanta | 2025-01-09 – 2025-01-17 | 4 | — |
| ATL→TYS Atlanta to Knoxville/Maryville | 2025-01-09 – 2025-01-17 | 4 | — |
| CLT→ATL Charlotte to Atlanta | 2023-10-09 – 2023-10-27 | 19 | — |
Because the same number has served different journeys, the statistics above describe only the route DL2331 currently operates. Blending them would produce an average of two different flights.
Why DL2331 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding, fuelling — within the carrier’s control
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
Share of the delay minutes US DOT attributed to each cause for DL2331 on DTW → PHL. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Other departures on DTW → PHL
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| DL2402 | Delta Air Lines | 81.5% | 11 min early | 984 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 94 records of DL2331 operating DTW → PHL, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
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