Flight profile · Delta Air Lines
DL999
New York (LGA) to Detroit (DTW) · scheduled 4:59 PM – 7:15 PM
How DL999 performs
753 operations, 2024-06-07 to 2026-06-30.
DL999 arrived on time 70.7% of the time, against 81.0% for all LGA → DTW flights — this specific departure is 10.2 percentage points worse than the route as a whole. Against Delta Air Lines’s own flights on this route it is 10.6 points worse.
Source: US DOT Bureau of Transportation Statistics · 753 operations between 2024-06-07 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL999 | 70.7% | 2.26% | -5 min | 12.9% | 753 |
| Delta Air Lines on LGA → DTW | 81.3% | 1.94% | -11 min | 8.0% | 5,931 |
| All LGA → DTW flights | 81.0% | 2.93% | -11 min | 8.3% | 12,232 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-06-07 to 2026-06-30
Other routes DL999 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 |
|---|---|---|---|
| SLC→BOS Salt Lake City to Boston | 2023-07-01 – 2024-06-06 | 119 | 89.1% |
| LAS→ATL Las Vegas to Atlanta | 2024-04-08 – 2024-05-06 | 29 | — |
| BOI→ATL Boise to Atlanta | 2024-03-10 – 2024-04-07 | 29 | — |
| JAX→JFK Jacksonville to New York | 2024-01-08 – 2024-02-05 | 29 | — |
| SLC→JFK Salt Lake City to New York | 2023-10-04 – 2023-12-15 | 73 | — |
Because the same number has served different journeys, the statistics above describe only the route DL999 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 753 records of DL999 operating LGA → DTW, 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.