Flight profile · Delta Air Lines
DL1256
Kansas City (MCI) to Detroit (DTW) · scheduled 6:15 AM – 9:14 AM
How DL1256 performs
524 operations, 2024-06-07 to 2026-06-30.
DL1256 arrived on time 93.6% of the time, against 88.8% for all MCI → DTW flights — this specific departure is 4.8 percentage points better than the route as a whole. Against Delta Air Lines’s own flights on this route it is 4.6 points better.
Source: US DOT Bureau of Transportation Statistics · 524 operations between 2024-06-07 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL1256 | 93.6% | 1.72% | -16 min | 3.1% | 524 |
| Delta Air Lines on MCI → DTW | 89.0% | 0.83% | -13 min | 4.9% | 3,833 |
| All MCI → DTW flights | 88.8% | 0.79% | -13 min | 4.9% | 4,037 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-06-07 to 2026-06-30
Other routes DL1256 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 |
|---|---|---|---|
| SFO→LAX San Francisco to Los Angeles | 2024-12-19 – 2026-01-04 | 26 | — |
| MSP→PHX Minneapolis to Phoenix | 2025-10-06 – 2025-12-19 | 61 | — |
| SMF→LAX Sacramento to Los Angeles | 2025-06-08 – 2025-10-05 | 117 | 95.7% |
| SFO→MSP San Francisco to Minneapolis | 2024-03-10 – 2024-06-06 | 61 | — |
| ORD→SEA Chicago to Seattle | 2024-04-09 – 2024-05-06 | 28 | — |
| SEA→ORD Seattle to Chicago | 2024-04-09 – 2024-05-06 | 28 | — |
| IAH→SLC Houston to Salt Lake City | 2024-01-08 – 2024-03-08 | 47 | — |
| CLT→MSP Charlotte to Minneapolis | 2023-09-05 – 2023-12-15 | 102 | 99.0% |
| BWI→MSP Baltimore to Minneapolis | 2023-07-01 – 2023-09-04 | 61 | — |
| MSP→BWI Minneapolis to Baltimore | 2023-07-01 – 2023-09-04 | 61 | — |
Because the same number has served different journeys, the statistics above describe only the route DL1256 currently operates. Blending them would produce an average of two different flights.
Why DL1256 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding, fuelling — within the carrier’s control
the inbound aircraft was late, so this flight started late
weather severe enough to stop this flight specifically
airspace and airport capacity, including weather-driven flow control
Share of the delay minutes US DOT attributed to each cause for DL1256 on MCI → DTW. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Data and methodology
Calculated by FlyerIntel from 524 records of DL1256 operating MCI → 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.