DL1639
DL1639 (Delta Air Lines) is a multi-stop service on 5 routes, busiest Charlotte to Detroit. Of 548 departures recorded from October 2024 to July 2026, 89.3% left on time, according to the US BTS.
- On-time departures89.3%of 548 flights
- Average delay7.4 min
- July 202624▼ 17.2%vs July 2025
- Cancelled0.7%
- Legs flown under this number5
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 | 26 | 28 | ▲ 7.7% |
| February | 28 | 26 | ▼ 7.1% |
| March | 31 | 28 | ▼ 9.7% |
| April | 30 | 26 | ▼ 13.3% |
| May | 31 | 5 | ▼ 83.9% |
| June | 29 | 18 | ▼ 37.9% |
| July | 29 | 24 | ▼ 17.2% |
| August | 29 | – | – |
| September | 26 | – | – |
| October | 27 | – | in progress |
| November | 24 | – | – |
| December | 26 | – | – |
| Year to date (Jan–Jul) | 204 | 155 | ▼ 24.0% |
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 | 92.3% | 92.6% | ▲ 0.3% |
| February | 78.6% | 88.5% | ▲ 12.6% |
| March | 96.8% | 82.1% | ▼ 15.1% |
| April | 93.3% | 96.0% | ▲ 2.9% |
| May | 90.3% | 80.0% | ▼ 11.4% |
| June | 93.1% | 88.9% | ▼ 4.5% |
| July | 82.8% | 83.3% | ▲ 0.7% |
| August | 89.7% | – | – |
| September | 96.2% | – | – |
| October | 88.9% | – | in progress |
| November | 95.8% | – | – |
| December | 75.0% | – | – |
| Year-to-date average (Jan–Jul) | 89.6% | 87.3% | ▼ 2.5% |
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 | 0 | 1 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 1 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 0 | 2 |
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 99.3% 544
- Cancelled 0.7% 4
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 |
|---|---|---|---|---|
| CLT DTW Charlotte Douglas International Airport – Detroit Metropolitan Wayne County Airport | 806 | 4.5 min | 90.4% | 410 |
| DTW CLT Detroit Metropolitan Wayne County Airport – Charlotte Douglas International Airport | 806 | 10.0 min | 85.5% | 69 |
| TRI ATL Tri-Cities Regional TN/VA Airport – Hartsfield Jackson Atlanta International Airport | 365 | 14.5 min | 86.7% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 85.0% | 0 |
| November 2024 | 23 | 23 | 91.3% | 0 |
| December 2024 | 14 | 14 | 100.0% | 0 |
| January 2025 | 26 | 26 | 92.3% | 0 |
| February 2025 | 28 | 28 | 78.6% | 0 |
| March 2025 | 31 | 31 | 96.8% | 0 |
| April 2025 | 30 | 30 | 93.3% | 0 |
| May 2025 | 31 | 31 | 90.3% | 0 |
| June 2025 | 29 | 29 | 93.1% | 0 |
| July 2025 | 29 | 29 | 82.8% | 0 |
| August 2025 | 29 | 29 | 89.7% | 0 |
| September 2025 | 26 | 26 | 96.2% | 0 |
| October 2025 | 27 | 27 | 88.9% | 0 |
| November 2025 | 24 | 24 | 95.8% | 0 |
| December 2025 | 26 | 24 | 75.0% | 2 |
| January 2026 | 28 | 27 | 92.6% | 1 |
| February 2026 | 26 | 26 | 88.5% | 0 |
| March 2026 | 28 | 28 | 82.1% | 0 |
| April 2026 | 26 | 25 | 96.0% | 1 |
| May 2026 | 5 | 5 | 80.0% | 0 |
| June 2026 | 18 | 18 | 88.9% | 0 |
| July 2026 | 24 | 24 | 83.3% | 0 |