Flight profile · Delta Air Lines
DL1257
Atlanta (ATL) to Baltimore (BWI) · scheduled 6:59 PM – 8:43 PM
How DL1257 performs
668 operations, 2024-06-07 to 2026-06-30.
DL1257 arrived on time 69.8% of the time, against 75.9% for all ATL → BWI flights — this specific departure is 6.2 percentage points worse than the route as a whole. Against Delta Air Lines’s own flights on this route it is 8.3 points worse.
Source: US DOT Bureau of Transportation Statistics · 668 operations between 2024-06-07 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL1257 | 69.8% | 1.50% | 2 min | 13.3% | 668 |
| Delta Air Lines on ATL → BWI | 78.1% | 1.18% | -2 min | 7.4% | 8,555 |
| All ATL → BWI flights | 75.9% | 1.47% | -2 min | 8.4% | 17,650 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-06-07 to 2026-06-30
Other routes DL1257 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→SEA Las Vegas to Seattle | 2026-02-12 – 2026-03-07 | 24 | — |
| SFO→ATL San Francisco to Atlanta | 2024-05-07 – 2024-06-06 | 31 | — |
| SLC→MSP Salt Lake City to Minneapolis | 2024-04-09 – 2024-05-06 | 28 | — |
| RDU→MIA Raleigh–Durham to Miami | 2023-07-01 – 2024-04-08 | 220 | 89.9% |
| MSP→PHX Minneapolis to Phoenix | 2024-01-08 – 2024-03-08 | 32 | — |
Because the same number has served different journeys, the statistics above describe only the route DL1257 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 668 records of DL1257 operating ATL → BWI, 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.