DL1256
DL1256 (Delta Air Lines) is a multi-stop service on 4 routes, busiest Kansas City to Detroit. Of 632 departures recorded from October 2024 to July 2026, 92.5% left on time, according to the US BTS.
- On-time departures92.5%of 632 flights
- Average delay-0.3 min
- July 202631▲ 0.0%vs July 2025
- Cancelled1.4%
- Legs flown under this number4
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 30 | 30 | 0.0% |
| February | 28 | 28 | 0.0% |
| March | 31 | 30 | ▼ 3.2% |
| April | 30 | 30 | 0.0% |
| May | 31 | 31 | 0.0% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 30 | – | – |
| September | 28 | – | – |
| October | 30 | – | in progress |
| November | 22 | – | – |
| December | 23 | – | – |
| Year to date (Jan–Jul) | 211 | 210 | ▼ 0.5% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 92.9% | 96.6% | ▲ 4.0% |
| February | 89.3% | 96.3% | ▲ 7.9% |
| March | 96.8% | 100.0% | ▲ 3.3% |
| April | 100.0% | 83.3% | ▼ 16.7% |
| May | 93.6% | 100.0% | ▲ 6.9% |
| June | 90.0% | 90.0% | 0.0% |
| July | 93.6% | 100.0% | ▲ 6.9% |
| August | 100.0% | – | – |
| September | 92.9% | – | – |
| October | 76.7% | – | in progress |
| November | 77.3% | – | – |
| December | 65.2% | – | – |
| Year-to-date average (Jan–Jul) | 93.7% | 95.2% | ▲ 1.5% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 1 | ▼ 50.0% |
| February | 0 | 1 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 3 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 6 | ▲ 200.0% |
according to the US BTS · October 2024 → July 2026
This is a historical record of departures already flown, not a forecast for your flight.
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 98.6% 623
- Cancelled 1.4% 9
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| MCI DTW Kansas City International Airport – Detroit Metropolitan Wayne County Airport | 1,009 | -2.0 min | 95.2% | 428 |
| SMF LAX Sacramento International Airport – Los Angeles International Airport | 600 | -4.6 min | 95.7% | 117 |
| MSP PHX Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field – Phoenix Sky Harbor International Airport | 2,051 | 16.2 min | 72.1% | 61 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 100.0% | 0 |
| November 2024 | 30 | 30 | 100.0% | 0 |
| December 2024 | 28 | 28 | 92.9% | 0 |
| January 2025 | 30 | 28 | 92.9% | 2 |
| February 2025 | 28 | 28 | 89.3% | 0 |
| March 2025 | 31 | 31 | 96.8% | 0 |
| April 2025 | 30 | 30 | 100.0% | 0 |
| May 2025 | 31 | 31 | 93.6% | 0 |
| June 2025 | 30 | 30 | 90.0% | 0 |
| July 2025 | 31 | 31 | 93.6% | 0 |
| August 2025 | 30 | 29 | 100.0% | 1 |
| September 2025 | 28 | 28 | 92.9% | 0 |
| October 2025 | 30 | 30 | 76.7% | 0 |
| November 2025 | 22 | 22 | 77.3% | 0 |
| December 2025 | 23 | 23 | 65.2% | 0 |
| January 2026 | 30 | 29 | 96.6% | 1 |
| February 2026 | 28 | 27 | 96.3% | 1 |
| March 2026 | 30 | 29 | 100.0% | 1 |
| April 2026 | 30 | 30 | 83.3% | 0 |
| May 2026 | 31 | 28 | 100.0% | 3 |
| June 2026 | 30 | 30 | 90.0% | 0 |
| July 2026 | 31 | 31 | 100.0% | 0 |