Flight profile · Delta Air Lines
DL519
Atlanta (ATL) to Denver (DEN) · scheduled 2:28 PM – 3:49 PM
How DL519 performs
803 operations, 2024-01-08 to 2026-06-30.
DL519 arrived on time 66.5% of the time, against 77.2% for all ATL → DEN flights — this specific departure is 10.7 percentage points worse than the route as a whole. Against Delta Air Lines’s own flights on this route it is 11.7 points worse.
Source: US DOT Bureau of Transportation Statistics · 803 operations between 2024-01-08 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL519 | 66.5% | 0.62% | 3 min | 9.9% | 803 |
| Delta Air Lines on ATL → DEN | 78.1% | 0.86% | -4 min | 5.9% | 8,490 |
| All ATL → DEN flights | 77.2% | 0.93% | -4 min | 7.2% | 17,571 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-01-08 to 2026-06-30
Other routes DL519 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 |
|---|---|---|---|
| DEN→ATL Denver to Atlanta | 2024-12-19 – 2026-01-04 | 78 | — |
| LGA→DEN New York to Denver | 2023-07-01 – 2024-06-06 | 220 | 88.1% |
| DEN→LGA Denver to New York | 2023-07-01 – 2024-06-06 | 217 | 84.8% |
| JFK→SLC New York to Salt Lake City | 2024-04-09 – 2024-05-06 | 28 | — |
| SLC→MSY Salt Lake City to New Orleans | 2024-03-10 – 2024-04-08 | 30 | — |
Because the same number has served different journeys, the statistics above describe only the route DL519 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 803 records of DL519 operating ATL → DEN, 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.