DL1787
DL1787 (Delta Air Lines) is a multi-stop service on 5 routes, busiest Detroit to Dulles. Of 198 departures recorded from December 2025 to July 2026, 73.7% left on time, according to the US BTS.
- On-time departures73.7%of 198 flights
- Average delay19.9 min
- July 202652
- Cancelled4.0%
- Legs flown under this number5
Recorded departures by month
Short series — DL1787 has only 8 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.
The most recent periods8 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | 4 | – |
| February | – | 17 | – |
| March | – | 7 | – |
| April | – | 2 | – |
| May | – | 50 | – |
| June | – | 54 | – |
| July | – | 52 | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | 12 | – | – |
according to the US BTS · December 2025 → July 2026
On-time departures by month
Short series — DL1787 has only 8 months so far. Enough to show the level now, not enough to read a trend.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods8 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | 33.3% | – |
| February | – | 47.1% | – |
| March | – | 71.4% | – |
| April | – | 100.0% | – |
| May | – | 87.8% | – |
| June | – | 73.1% | – |
| July | – | 70.0% | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | 80.0% | – | – |
according to the US BTS · December 2025 → July 2026
Average departure delay by month
Short series — DL1787 has only 8 months so far. Enough to show the level now, not enough to read a trend.
according to the US BTS · December 2025 → July 2026
Cancelled departures by month
Short series — DL1787 has only 8 months so far. Enough to show the level now, not enough to read a trend.
The most recent periods8 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | 1 | – |
| February | – | 0 | – |
| March | – | 0 | – |
| April | – | 0 | – |
| May | – | 1 | – |
| June | – | 2 | – |
| July | – | 2 | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | 2 | – | – |
according to the US BTS · December 2025 → 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 96.0% 190
- Cancelled 4.0% 8
Share of all recorded flights in the period, all legs. · Dec 20, 2025 → Jul 31, 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 |
|---|---|---|---|---|
| IAD DTW Washington Dulles International Airport – Detroit Metropolitan Wayne County Airport | 616 | 19.0 min | 77.3% | 78 |
| DTW IAD Detroit Metropolitan Wayne County Airport – Washington Dulles International Airport | 616 | 15.1 min | 76.3% | 78 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| December 2025 | 12 | 10 | 80.0% | 2 |
| January 2026 | 4 | 3 | 33.3% | 1 |
| February 2026 | 17 | 17 | 47.1% | 0 |
| March 2026 | 7 | 7 | 71.4% | 0 |
| April 2026 | 2 | 2 | 100.0% | 0 |
| May 2026 | 50 | 49 | 87.8% | 1 |
| June 2026 | 54 | 52 | 73.1% | 2 |
| July 2026 | 52 | 50 | 70.0% | 2 |