Flight profile · Delta Air Lines
DL1255
Harrisburg (MDT) to Atlanta (ATL) · scheduled 6:00 AM – 8:02 AM
How DL1255 performs
723 operations, 2024-06-07 to 2026-06-30.
DL1255 arrived on time 90.4% of the time, against 86.8% for all MDT → ATL flights — this specific departure is 3.6 percentage points better than the route as a whole. Against Delta Air Lines’s own flights on this route it is 3.5 points better.
Source: US DOT Bureau of Transportation Statistics · 723 operations between 2024-06-07 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL1255 | 90.4% | 2.07% | -16 min | 3.7% | 723 |
| Delta Air Lines on MDT → ATL | 86.9% | 1.25% | -14 min | 4.8% | 2,713 |
| All MDT → ATL flights | 86.8% | 1.25% | -14 min | 4.9% | 2,966 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-06-07 to 2026-06-30
Other routes DL1255 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 |
|---|---|---|---|
| LAS→ATL Las Vegas to Atlanta | 2025-12-20 – 2026-01-04 | 12 | — |
| TPA→SLC Tampa to Salt Lake City | 2023-07-01 – 2024-06-06 | 228 | 92.0% |
| MCO→ATL Orlando to Atlanta | 2024-04-09 – 2024-05-06 | 28 | — |
| GSP→ATL Greenville/Greer/Spartanburg to Atlanta | 2024-01-08 – 2024-03-09 | 62 | — |
| AUS→SLC Austin to Salt Lake City | 2023-12-16 – 2024-01-07 | 18 | — |
| ATL→MEM Atlanta to Memphis | 2024-01-06 – 2024-01-06 | 1 | — |
| MEM→ATL Memphis to Atlanta | 2024-01-06 – 2024-01-06 | 1 | — |
Because the same number has served different journeys, the statistics above describe only the route DL1255 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 723 records of DL1255 operating MDT → ATL, 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.