DL518
DL518 (Delta Air Lines) is a multi-stop service on 6 routes, busiest Atlanta to Boston. Of 532 departures recorded from October 2024 to July 2026, 60.9% left on time, according to the US BTS.
- On-time departures60.9%of 532 flights
- Average delay25.4 min
- July 202630▲ 7.1%vs July 2025
- Cancelled1.5%
- Legs flown under this number6
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 | 26 | 14 | ▼ 46.2% |
| February | 28 | 9 | ▼ 67.9% |
| March | 31 | 21 | ▼ 32.3% |
| April | 17 | 20 | ▲ 17.6% |
| May | 26 | 28 | ▲ 7.7% |
| June | 21 | 29 | ▲ 38.1% |
| July | 28 | 30 | ▲ 7.1% |
| August | 30 | – | – |
| September | 22 | – | – |
| October | 29 | – | in progress |
| November | 30 | – | – |
| December | 28 | – | – |
| Year to date (Jan–Jul) | 177 | 151 | ▼ 14.7% |
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 | 72.0% | 46.2% | ▼ 35.9% |
| February | 63.0% | 88.9% | ▲ 41.2% |
| March | 54.8% | 52.4% | ▼ 4.5% |
| April | 80.0% | 70.0% | ▼ 12.5% |
| May | 65.4% | 85.2% | ▲ 30.3% |
| June | 52.4% | 58.6% | ▲ 11.9% |
| July | 39.3% | 34.5% | ▼ 12.2% |
| August | 66.7% | – | – |
| September | 36.4% | – | – |
| October | 53.6% | – | in progress |
| November | 70.0% | – | – |
| December | 60.7% | – | – |
| Year-to-date average (Jan–Jul) | 61.0% | 62.2% | ▲ 2.1% |
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 | 2 | 0 | ▼ 100.0% |
| May | 0 | 1 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 3 | ▼ 25.0% |
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 98.5% 524
- Cancelled 1.5% 8
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 BOS Hartsfield Jackson Atlanta International Airport – Boston Logan International Airport | 1,521 | 24.9 min | 61.1% | 509 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 73.7% | 0 |
| November 2024 | 29 | 29 | 65.5% | 0 |
| December 2024 | 17 | 17 | 76.5% | 0 |
| January 2025 | 26 | 25 | 72.0% | 1 |
| February 2025 | 28 | 27 | 63.0% | 1 |
| March 2025 | 31 | 31 | 54.8% | 0 |
| April 2025 | 17 | 15 | 80.0% | 2 |
| May 2025 | 26 | 26 | 65.4% | 0 |
| June 2025 | 21 | 21 | 52.4% | 0 |
| July 2025 | 28 | 28 | 39.3% | 0 |
| August 2025 | 30 | 30 | 66.7% | 0 |
| September 2025 | 22 | 22 | 36.4% | 0 |
| October 2025 | 29 | 28 | 53.6% | 1 |
| November 2025 | 30 | 30 | 70.0% | 0 |
| December 2025 | 28 | 28 | 60.7% | 0 |
| January 2026 | 14 | 13 | 46.2% | 1 |
| February 2026 | 9 | 9 | 88.9% | 0 |
| March 2026 | 21 | 21 | 52.4% | 0 |
| April 2026 | 20 | 20 | 70.0% | 0 |
| May 2026 | 28 | 27 | 85.2% | 1 |
| June 2026 | 29 | 29 | 58.6% | 0 |
| July 2026 | 30 | 29 | 34.5% | 1 |