DL1665
DL1665 (Delta Air Lines) is a multi-stop service on 4 routes, busiest Detroit to Chicago. Of 692 departures recorded from October 2024 to July 2026, 72.6% left on time, according to the US BTS.
- On-time departures72.6%of 692 flights
- Average delay22.4 min
- July 202631▲ 0.0%vs July 2025
- Cancelled2.0%
- 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 | 27 | 27 | 0.0% |
| February | 28 | 28 | 0.0% |
| March | 31 | 31 | 0.0% |
| April | 30 | 30 | 0.0% |
| May | 31 | 31 | 0.0% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 57 | – | in progress |
| November | 54 | – | – |
| December | 38 | – | – |
| Year to date (Jan–Jul) | 208 | 208 | 0.0% |
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 | 73.1% | 72.0% | ▼ 1.5% |
| February | 78.6% | 89.3% | ▲ 13.6% |
| March | 71.0% | 58.6% | ▼ 17.4% |
| April | 83.3% | 85.7% | ▲ 2.9% |
| May | 71.0% | 72.4% | ▲ 2.0% |
| June | 70.0% | 55.2% | ▼ 21.2% |
| July | 50.0% | 40.0% | ▼ 20.0% |
| August | 67.7% | – | – |
| September | 76.7% | – | – |
| October | 66.7% | – | in progress |
| November | 85.2% | – | – |
| December | 77.8% | – | – |
| Year-to-date average (Jan–Jul) | 71.0% | 67.6% | ▼ 4.8% |
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 | 1 | 2 | ▲ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 2 | – |
| April | 0 | 2 | – |
| May | 0 | 2 | – |
| June | 0 | 1 | – |
| July | 1 | 1 | 0.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 2 | 10 | ▲ 400.0% |
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 98.0% 678
- Cancelled 2.0% 14
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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DTW ORD Detroit Metropolitan Wayne County Airport – Chicago O'Hare International Airport | 376 | 24.1 min | 71.7% | 580 |
| TPA ATL Tampa International Airport – Hartsfield Jackson Atlanta International Airport | 655 | 8.5 min | 84.6% | 40 |
| ATL TPA Hartsfield Jackson Atlanta International Airport – Tampa International Airport | 655 | 7.8 min | 82.1% | 40 |
| ORD DTW Chicago O'Hare International Airport – Detroit Metropolitan Wayne County Airport | 376 | 27.8 min | 62.5% | 32 |
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 | 17 | 17 | 82.4% | 0 |
| January 2025 | 27 | 26 | 73.1% | 1 |
| February 2025 | 28 | 28 | 78.6% | 0 |
| March 2025 | 31 | 31 | 71.0% | 0 |
| April 2025 | 30 | 30 | 83.3% | 0 |
| May 2025 | 31 | 31 | 71.0% | 0 |
| June 2025 | 30 | 30 | 70.0% | 0 |
| July 2025 | 31 | 30 | 50.0% | 1 |
| August 2025 | 31 | 31 | 67.7% | 0 |
| September 2025 | 30 | 30 | 76.7% | 0 |
| October 2025 | 57 | 57 | 66.7% | 0 |
| November 2025 | 54 | 54 | 85.2% | 0 |
| December 2025 | 38 | 36 | 77.8% | 2 |
| January 2026 | 27 | 25 | 72.0% | 2 |
| February 2026 | 28 | 28 | 89.3% | 0 |
| March 2026 | 31 | 29 | 58.6% | 2 |
| April 2026 | 30 | 28 | 85.7% | 2 |
| May 2026 | 31 | 29 | 72.4% | 2 |
| June 2026 | 30 | 29 | 55.2% | 1 |
| July 2026 | 31 | 30 | 40.0% | 1 |