DL517
DL517 (Delta Air Lines) is a multi-stop service on 5 routes, busiest Atlanta to San Francisco. Of 631 departures recorded from October 2024 to July 2026, 75.0% left on time, according to the US BTS.
- On-time departures75.0%of 631 flights
- Average delay15.0 min
- July 202647▲ 51.6%vs July 2025
- Cancelled0.6%
- 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 | 28 | 31 | ▲ 10.7% |
| February | 24 | 28 | ▲ 16.7% |
| March | 29 | 31 | ▲ 6.9% |
| April | 30 | 30 | 0.0% |
| May | 31 | 31 | 0.0% |
| June | 30 | 42 | ▲ 40.0% |
| July | 31 | 47 | ▲ 51.6% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 27 | – | in progress |
| November | 6 | – | – |
| December | 30 | – | – |
| Year to date (Jan–Jul) | 203 | 240 | ▲ 18.2% |
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 | 88.9% | 90.0% | ▲ 1.2% |
| February | 73.9% | 89.3% | ▲ 20.8% |
| March | 75.9% | 83.9% | ▲ 10.6% |
| April | 73.3% | 80.0% | ▲ 9.1% |
| May | 80.7% | 51.6% | ▼ 36.0% |
| June | 56.7% | 59.5% | ▲ 5.0% |
| July | 67.7% | 56.5% | ▼ 16.6% |
| August | 74.2% | – | – |
| September | 96.7% | – | – |
| October | 92.6% | – | in progress |
| November | 83.3% | – | – |
| December | 66.7% | – | – |
| Year-to-date average (Jan–Jul) | 73.9% | 73.0% | ▼ 1.2% |
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 | 1 | 0.0% |
| February | 1 | 0 | ▼ 100.0% |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 2 | 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 99.4% 627
- Cancelled 0.6% 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 SFO Hartsfield Jackson Atlanta International Airport – San Francisco International Airport | 3,435 | 14.4 min | 75.5% | 498 |
| DFW JFK Dallas Fort Worth International Airport – John F. Kennedy International Airport | 2,235 | 14.0 min | 80.4% | 53 |
| LAX BNA Los Angeles International Airport – Nashville International Airport | 2,886 | 6.4 min | 85.3% | 34 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 14 | 14 | 85.7% | 0 |
| November 2024 | 19 | 19 | 79.0% | 0 |
| December 2024 | 31 | 31 | 77.4% | 0 |
| January 2025 | 28 | 27 | 88.9% | 1 |
| February 2025 | 24 | 23 | 73.9% | 1 |
| March 2025 | 29 | 29 | 75.9% | 0 |
| April 2025 | 30 | 30 | 73.3% | 0 |
| May 2025 | 31 | 31 | 80.7% | 0 |
| June 2025 | 30 | 30 | 56.7% | 0 |
| July 2025 | 31 | 31 | 67.7% | 0 |
| August 2025 | 31 | 31 | 74.2% | 0 |
| September 2025 | 30 | 30 | 96.7% | 0 |
| October 2025 | 27 | 27 | 92.6% | 0 |
| November 2025 | 6 | 6 | 83.3% | 0 |
| December 2025 | 30 | 30 | 66.7% | 0 |
| January 2026 | 31 | 30 | 90.0% | 1 |
| February 2026 | 28 | 28 | 89.3% | 0 |
| March 2026 | 31 | 31 | 83.9% | 0 |
| April 2026 | 30 | 30 | 80.0% | 0 |
| May 2026 | 31 | 31 | 51.6% | 0 |
| June 2026 | 42 | 42 | 59.5% | 0 |
| July 2026 | 47 | 46 | 56.5% | 1 |