DL651
DL651 (Delta Air Lines) is a multi-stop service on 5 routes, busiest Atlanta to Detroit. Of 474 departures recorded from October 2024 to July 2026, 79.2% left on time, according to the US BTS.
- On-time departures79.2%of 474 flights
- Average delay16.1 min
- July 202631▲ 34.8%vs July 2025
- Cancelled0.8%
- 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 | 12 | 23 | ▲ 91.7% |
| February | 14 | 25 | ▲ 78.6% |
| March | 16 | 30 | ▲ 87.5% |
| April | 18 | 30 | ▲ 66.7% |
| May | 17 | 26 | ▲ 52.9% |
| June | 24 | 29 | ▲ 20.8% |
| July | 23 | 31 | ▲ 34.8% |
| August | 28 | – | – |
| September | 19 | – | – |
| October | 22 | – | in progress |
| November | 21 | – | – |
| December | 30 | – | – |
| Year to date (Jan–Jul) | 124 | 194 | ▲ 56.5% |
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 | 83.3% | 61.9% | ▼ 25.7% |
| February | 100.0% | 52.2% | ▼ 47.8% |
| March | 100.0% | 63.3% | ▼ 36.7% |
| April | 88.9% | 93.3% | ▲ 5.0% |
| May | 88.2% | 53.9% | ▼ 39.0% |
| June | 100.0% | 72.4% | ▼ 27.6% |
| July | 95.7% | 38.7% | ▼ 59.5% |
| August | 85.7% | – | – |
| September | 89.5% | – | – |
| October | 95.5% | – | in progress |
| November | 95.2% | – | – |
| December | 80.0% | – | – |
| Year-to-date average (Jan–Jul) | 93.7% | 62.2% | ▼ 33.6% |
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 | 2 | – |
| February | 0 | 2 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 4 |
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 99.2% 470
- Cancelled 0.8% 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 |
|---|---|---|---|---|
| ATL DTW Hartsfield Jackson Atlanta International Airport – Detroit Metropolitan Wayne County Airport | 958 | 13.7 min | 81.7% | 387 |
| MCO BOS Orlando International Airport – Boston Logan International Airport | 1,806 | 26.8 min | 60.9% | 50 |
| LAS JFK Harry Reid International Airport – John F. Kennedy International Airport | 3,609 | 31.9 min | 75.0% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 10 | 10 | 100.0% | 0 |
| November 2024 | 7 | 7 | 85.7% | 0 |
| December 2024 | 19 | 19 | 73.7% | 0 |
| January 2025 | 12 | 12 | 83.3% | 0 |
| February 2025 | 14 | 14 | 100.0% | 0 |
| March 2025 | 16 | 16 | 100.0% | 0 |
| April 2025 | 18 | 18 | 88.9% | 0 |
| May 2025 | 17 | 17 | 88.2% | 0 |
| June 2025 | 24 | 24 | 100.0% | 0 |
| July 2025 | 23 | 23 | 95.7% | 0 |
| August 2025 | 28 | 28 | 85.7% | 0 |
| September 2025 | 19 | 19 | 89.5% | 0 |
| October 2025 | 22 | 22 | 95.5% | 0 |
| November 2025 | 21 | 21 | 95.2% | 0 |
| December 2025 | 30 | 30 | 80.0% | 0 |
| January 2026 | 23 | 21 | 61.9% | 2 |
| February 2026 | 25 | 23 | 52.2% | 2 |
| March 2026 | 30 | 30 | 63.3% | 0 |
| April 2026 | 30 | 30 | 93.3% | 0 |
| May 2026 | 26 | 26 | 53.9% | 0 |
| June 2026 | 29 | 29 | 72.4% | 0 |
| July 2026 | 31 | 31 | 38.7% | 0 |