DL817
DL817 (Delta Air Lines) is a multi-stop service on 4 routes, busiest Boston to Raleigh. Of 535 departures recorded from October 2024 to July 2026, 58.5% left on time, according to the US BTS.
- On-time departures58.5%of 535 flights
- Average delay34.2 min
- July 202627▲ 3.8%vs July 2025
- Cancelled2.6%
- Legs flown under this number4
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 | 25 | 28 | ▲ 12.0% |
| February | 27 | 26 | ▼ 3.7% |
| March | 28 | 27 | ▼ 3.6% |
| April | 28 | 26 | ▼ 7.1% |
| May | 25 | 25 | 0.0% |
| June | 26 | 24 | ▼ 7.7% |
| July | 26 | 27 | ▲ 3.8% |
| August | 25 | – | – |
| September | 26 | – | – |
| October | 26 | – | in progress |
| November | 20 | – | – |
| December | 26 | – | – |
| Year to date (Jan–Jul) | 185 | 183 | ▼ 1.1% |
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 | 76.0% | 75.0% | ▼ 1.3% |
| February | 65.4% | 64.0% | ▼ 2.1% |
| March | 64.3% | 59.3% | ▼ 7.8% |
| April | 71.4% | 53.9% | ▼ 24.6% |
| May | 45.8% | 68.0% | ▲ 48.4% |
| June | 50.0% | 63.6% | ▲ 27.3% |
| July | 36.0% | 40.0% | ▲ 11.1% |
| August | 48.0% | – | – |
| September | 32.0% | – | – |
| October | 28.0% | – | in progress |
| November | 65.0% | – | – |
| December | 76.9% | – | – |
| Year-to-date average (Jan–Jul) | 58.4% | 60.5% | ▲ 3.6% |
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 | 4 | – |
| February | 1 | 1 | 0.0% |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 2 | – |
| July | 1 | 2 | ▲ 100.0% |
| August | 0 | – | – |
| September | 1 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 3 | 9 | ▲ 200.0% |
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 97.4% 521
- Cancelled 2.6% 14
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BOS RDU Boston Logan International Airport – Raleigh-Durham International Airport | 984 | 35.2 min | 57.5% | 518 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 12 | 12 | 75.0% | 0 |
| November 2024 | 16 | 16 | 75.0% | 0 |
| December 2024 | 16 | 16 | 75.0% | 0 |
| January 2025 | 25 | 25 | 76.0% | 0 |
| February 2025 | 27 | 26 | 65.4% | 1 |
| March 2025 | 28 | 28 | 64.3% | 0 |
| April 2025 | 28 | 28 | 71.4% | 0 |
| May 2025 | 25 | 24 | 45.8% | 1 |
| June 2025 | 26 | 26 | 50.0% | 0 |
| July 2025 | 26 | 25 | 36.0% | 1 |
| August 2025 | 25 | 25 | 48.0% | 0 |
| September 2025 | 26 | 25 | 32.0% | 1 |
| October 2025 | 26 | 25 | 28.0% | 1 |
| November 2025 | 20 | 20 | 65.0% | 0 |
| December 2025 | 26 | 26 | 76.9% | 0 |
| January 2026 | 28 | 24 | 75.0% | 4 |
| February 2026 | 26 | 25 | 64.0% | 1 |
| March 2026 | 27 | 27 | 59.3% | 0 |
| April 2026 | 26 | 26 | 53.9% | 0 |
| May 2026 | 25 | 25 | 68.0% | 0 |
| June 2026 | 24 | 22 | 63.6% | 2 |
| July 2026 | 27 | 25 | 40.0% | 2 |