DL1851
DL1851 (Delta Air Lines) is a multi-stop service on 3 routes, busiest Detroit to Kansas City. Of 154 departures recorded from December 2024 to March 2026, 67.6% left on time, according to the US BTS.
- On-time departures67.6%of 154 flights
- Average delay36.0 min
- March 20267
- Cancelled2.0%
- Legs flown under this number3
Recorded departures by month
Short series — DL1851 has only 10 months so far. Enough to show the level now, not enough to read a trend.
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods9 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 5 | 5 | 0.0% |
| February | – | 17 | – |
| March | – | 7 | – |
| April | – | – | – |
| May | – | – | – |
| June | 23 | – | – |
| July | 31 | – | – |
| August | 31 | – | – |
| September | 10 | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | 12 | – | – |
according to the US BTS · December 2024 → March 2026
On-time departures by month
Short series — DL1851 has only 10 months so far. Enough to show the level now, not enough to read a trend.
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods9 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 80.0% | 25.0% | ▼ 68.8% |
| February | – | 82.4% | – |
| March | – | 71.4% | – |
| April | – | – | – |
| May | – | – | – |
| June | 68.2% | – | – |
| July | 54.8% | – | – |
| August | 74.2% | – | – |
| September | 70.0% | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | 72.7% | – | – |
according to the US BTS · December 2024 → March 2026
Average departure delay by month
Short series — DL1851 has only 10 months so far. Enough to show the level now, not enough to read a trend.
Months without data are left blank.
according to the US BTS · December 2024 → March 2026
Cancelled departures by month
Short series — DL1851 has only 10 months so far. Enough to show the level now, not enough to read a trend.
Months without data are left blank.
The most recent periods9 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | – | 0 | – |
| March | – | 0 | – |
| April | – | – | – |
| May | – | – | – |
| June | 1 | – | – |
| July | 0 | – | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | 1 | – | – |
according to the US BTS · December 2024 → March 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 98.1% 151
- Cancelled 1.9% 3
Share of all recorded flights in the period, all legs. · Dec 19, 2024 → Mar 7, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DTW MCI Detroit Metropolitan Wayne County Airport – Kansas City International Airport | 1,009 | 34.0 min | 66.0% | 95 |
| SJU BOS Luis Munoz Marin International Airport – Boston Logan International Airport | 2,702 | 49.7 min | 63.6% | 35 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| December 2024 | 13 | 13 | 61.5% | 0 |
| January 2025 | 5 | 5 | 80.0% | 0 |
| June 2025 | 23 | 22 | 68.2% | 1 |
| July 2025 | 31 | 31 | 54.8% | 0 |
| August 2025 | 31 | 31 | 74.2% | 0 |
| September 2025 | 10 | 10 | 70.0% | 0 |
| December 2025 | 12 | 11 | 72.7% | 1 |
| January 2026 | 5 | 4 | 25.0% | 1 |
| February 2026 | 17 | 17 | 82.4% | 0 |
| March 2026 | 7 | 7 | 71.4% | 0 |