DL779
DL779 (Delta Air Lines) is a multi-stop service on 2 routes, busiest Atlanta to Ontario. Of 555 departures recorded from October 2024 to July 2026, 70.3% left on time, according to the US BTS.
- On-time departures70.3%of 555 flights
- Average delay15.6 min
- July 202627▼ 3.6%vs July 2025
- Cancelled1.6%
- Legs flown under this number2
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 | 30 | 29 | ▼ 3.3% |
| February | 28 | 28 | 0.0% |
| March | 31 | 7 | ▼ 77.4% |
| April | 30 | 18 | ▼ 40.0% |
| May | 31 | 31 | 0.0% |
| June | 27 | 20 | ▼ 25.9% |
| July | 28 | 27 | ▼ 3.6% |
| August | 20 | – | – |
| September | 17 | – | – |
| October | 23 | – | in progress |
| November | 26 | – | – |
| December | 28 | – | – |
| Year to date (Jan–Jul) | 205 | 160 | ▼ 22.0% |
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 | 82.1% | 60.7% | ▼ 26.1% |
| February | 67.9% | 85.2% | ▲ 25.5% |
| March | 70.0% | 100.0% | ▲ 42.9% |
| April | 66.7% | 94.4% | ▲ 41.7% |
| May | 74.2% | 87.1% | ▲ 17.4% |
| June | 50.0% | 63.2% | ▲ 26.3% |
| July | 42.9% | 53.9% | ▲ 25.6% |
| August | 65.0% | – | – |
| September | 88.2% | – | – |
| October | 82.6% | – | in progress |
| November | 68.0% | – | – |
| December | 53.6% | – | – |
| Year-to-date average (Jan–Jul) | 64.8% | 77.8% | ▲ 20.0% |
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 | 2 | 1 | ▼ 50.0% |
| February | 0 | 1 | – |
| March | 1 | 0 | ▼ 100.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 1 | 0.0% |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 4 | 0.0% |
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 98.4% 546
- Cancelled 1.6% 9
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 |
|---|---|---|---|---|
| ATL ONT Hartsfield Jackson Atlanta International Airport – Ontario International Airport | 3,050 | 16.3 min | 69.2% | 531 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 28 | 28 | 78.6% | 0 |
| December 2024 | 28 | 28 | 60.7% | 0 |
| January 2025 | 30 | 28 | 82.1% | 2 |
| February 2025 | 28 | 28 | 67.9% | 0 |
| March 2025 | 31 | 30 | 70.0% | 1 |
| April 2025 | 30 | 30 | 66.7% | 0 |
| May 2025 | 31 | 31 | 74.2% | 0 |
| June 2025 | 27 | 26 | 50.0% | 1 |
| July 2025 | 28 | 28 | 42.9% | 0 |
| August 2025 | 20 | 20 | 65.0% | 0 |
| September 2025 | 17 | 17 | 88.2% | 0 |
| October 2025 | 23 | 23 | 82.6% | 0 |
| November 2025 | 26 | 25 | 68.0% | 1 |
| December 2025 | 28 | 28 | 53.6% | 0 |
| January 2026 | 29 | 28 | 60.7% | 1 |
| February 2026 | 28 | 27 | 85.2% | 1 |
| March 2026 | 7 | 7 | 100.0% | 0 |
| April 2026 | 18 | 18 | 94.4% | 0 |
| May 2026 | 31 | 31 | 87.1% | 0 |
| June 2026 | 20 | 19 | 63.2% | 1 |
| July 2026 | 27 | 26 | 53.9% | 1 |