DL717
DL717 (Delta Air Lines) is a multi-stop service on 5 routes, busiest San Francisco to Detroit. Of 578 departures recorded from October 2024 to July 2026, 78.0% left on time, according to the US BTS.
- On-time departures78.0%of 578 flights
- Average delay10.0 min
- July 202631▲ 3.3%vs July 2025
- Cancelled1.0%
- 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 | 48 | 31 | ▼ 35.4% |
| February | 52 | 11 | ▼ 78.8% |
| March | 26 | 21 | ▼ 19.2% |
| April | 16 | 26 | ▲ 62.5% |
| May | 24 | 25 | ▲ 4.2% |
| June | 29 | 29 | 0.0% |
| July | 30 | 31 | ▲ 3.3% |
| August | 31 | – | – |
| September | 25 | – | – |
| October | 30 | – | in progress |
| November | 27 | – | – |
| December | 22 | – | – |
| Year to date (Jan–Jul) | 225 | 174 | ▼ 22.7% |
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 | 87.5% | 96.4% | ▲ 10.2% |
| February | 86.5% | 81.8% | ▼ 5.5% |
| March | 80.8% | 90.0% | ▲ 11.4% |
| April | 100.0% | 88.0% | ▼ 12.0% |
| May | 83.3% | 40.0% | ▼ 52.0% |
| June | 86.2% | 41.4% | ▼ 52.0% |
| July | 73.3% | 35.5% | ▼ 51.6% |
| August | 93.6% | – | – |
| September | 80.0% | – | – |
| October | 83.3% | – | in progress |
| November | 76.9% | – | – |
| December | 77.3% | – | – |
| Year-to-date average (Jan–Jul) | 85.4% | 67.6% | ▼ 20.8% |
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 | 0 | 3 | – |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 1 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 5 |
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 99.0% 572
- Cancelled 1.0% 6
Share of all recorded flights in the period, all legs. · Oct 13, 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 |
|---|---|---|---|---|
| SFO DTW San Francisco International Airport – Detroit Metropolitan Wayne County Airport | 3,337 | 12.3 min | 73.4% | 412 |
| PHL DTW Philadelphia International Airport – Detroit Metropolitan Wayne County Airport | 728 | 1.1 min | 87.5% | 56 |
| DTW PHL Detroit Metropolitan Wayne County Airport – Philadelphia International Airport | 728 | 5.6 min | 89.3% | 56 |
| CHA ATL Chattanooga Metropolitan Airport (Lovell Field) – Hartsfield Jackson Atlanta International Airport | 171 | 3.6 min | 91.4% | 38 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 12 | 12 | 91.7% | 0 |
| November 2024 | 16 | 16 | 68.8% | 0 |
| December 2024 | 16 | 16 | 81.3% | 0 |
| January 2025 | 48 | 48 | 87.5% | 0 |
| February 2025 | 52 | 52 | 86.5% | 0 |
| March 2025 | 26 | 26 | 80.8% | 0 |
| April 2025 | 16 | 16 | 100.0% | 0 |
| May 2025 | 24 | 24 | 83.3% | 0 |
| June 2025 | 29 | 29 | 86.2% | 0 |
| July 2025 | 30 | 30 | 73.3% | 0 |
| August 2025 | 31 | 31 | 93.6% | 0 |
| September 2025 | 25 | 25 | 80.0% | 0 |
| October 2025 | 30 | 30 | 83.3% | 0 |
| November 2025 | 27 | 26 | 76.9% | 1 |
| December 2025 | 22 | 22 | 77.3% | 0 |
| January 2026 | 31 | 28 | 96.4% | 3 |
| February 2026 | 11 | 11 | 81.8% | 0 |
| March 2026 | 21 | 20 | 90.0% | 1 |
| April 2026 | 26 | 25 | 88.0% | 1 |
| May 2026 | 25 | 25 | 40.0% | 0 |
| June 2026 | 29 | 29 | 41.4% | 0 |
| July 2026 | 31 | 31 | 35.5% | 0 |