DL1187
DL1187 (Delta Air Lines) flies Detroit to Boston. Of 636 departures recorded from October 2024 to July 2026, 69.2% left on time, according to the US BTS.
- On-time departures69.2%of 636 flights
- Average delay23.0 min
- July 202630▲ 11.1%vs July 2025
- Cancelled2.0%
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 31 | 31 | 0.0% |
| February | 26 | 28 | ▲ 7.7% |
| March | 29 | 31 | ▲ 6.9% |
| April | 30 | 30 | 0.0% |
| May | 31 | 31 | 0.0% |
| June | 27 | 29 | ▲ 7.4% |
| July | 27 | 30 | ▲ 11.1% |
| August | 25 | – | – |
| September | 29 | – | – |
| October | 31 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 201 | 210 | ▲ 4.5% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 54.8% | 55.2% | ▲ 0.6% |
| February | 80.8% | 76.9% | ▼ 4.8% |
| March | 79.3% | 74.2% | ▼ 6.5% |
| April | 79.3% | 79.3% | 0.0% |
| May | 67.7% | 71.0% | ▲ 4.8% |
| June | 44.0% | 75.9% | ▲ 72.4% |
| July | 50.0% | 37.9% | ▼ 24.1% |
| August | 50.0% | – | – |
| September | 72.4% | – | – |
| October | 83.3% | – | in progress |
| November | 75.9% | – | – |
| December | 64.5% | – | – |
| Year-to-date average (Jan–Jul) | 65.1% | 67.2% | ▲ 3.2% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 2 | – |
| February | 0 | 2 | – |
| March | 0 | 0 | – |
| April | 1 | 1 | 0.0% |
| May | 0 | 0 | – |
| June | 2 | 0 | ▼ 100.0% |
| July | 1 | 1 | 0.0% |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 6 | ▲ 50.0% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
Cancellation share
- Not cancelled 98.0% 623
- Cancelled 2.0% 13
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DTW BOS Detroit Metropolitan Wayne County Airport – Boston Logan International Airport | 1,015 | 23.0 min | 69.2% | 636 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 29 | 29 | 86.2% | 0 |
| December 2024 | 31 | 30 | 73.3% | 1 |
| January 2025 | 31 | 31 | 54.8% | 0 |
| February 2025 | 26 | 26 | 80.8% | 0 |
| March 2025 | 29 | 29 | 79.3% | 0 |
| April 2025 | 30 | 29 | 79.3% | 1 |
| May 2025 | 31 | 31 | 67.7% | 0 |
| June 2025 | 27 | 25 | 44.0% | 2 |
| July 2025 | 27 | 26 | 50.0% | 1 |
| August 2025 | 25 | 24 | 50.0% | 1 |
| September 2025 | 29 | 29 | 72.4% | 0 |
| October 2025 | 31 | 30 | 83.3% | 1 |
| November 2025 | 29 | 29 | 75.9% | 0 |
| December 2025 | 31 | 31 | 64.5% | 0 |
| January 2026 | 31 | 29 | 55.2% | 2 |
| February 2026 | 28 | 26 | 76.9% | 2 |
| March 2026 | 31 | 31 | 74.2% | 0 |
| April 2026 | 30 | 29 | 79.3% | 1 |
| May 2026 | 31 | 31 | 71.0% | 0 |
| June 2026 | 29 | 29 | 75.9% | 0 |
| July 2026 | 30 | 29 | 37.9% | 1 |