DL507
DL507 (Delta Air Lines) is a multi-stop service on 5 routes, busiest Los Angeles to Boston. Of 554 departures recorded from October 2024 to July 2026, 83.3% left on time, according to the US BTS.
- On-time departures83.3%of 554 flights
- Average delay9.9 min
- July 202628▲ 16.7%vs July 2025
- Cancelled1.6%
- 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 | 30 | 23 | ▼ 23.3% |
| February | 28 | 22 | ▼ 21.4% |
| March | 33 | 27 | ▼ 18.2% |
| April | 30 | 28 | ▼ 6.7% |
| May | 19 | 27 | ▲ 42.1% |
| June | 22 | 26 | ▲ 18.2% |
| July | 24 | 28 | ▲ 16.7% |
| August | 22 | – | – |
| September | 17 | – | – |
| October | 23 | – | in progress |
| November | 21 | – | – |
| December | 28 | – | – |
| Year to date (Jan–Jul) | 186 | 181 | ▼ 2.7% |
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 | 73.3% | 85.7% | ▲ 16.9% |
| February | 82.1% | 85.0% | ▲ 3.5% |
| March | 81.3% | 92.6% | ▲ 14.0% |
| April | 80.0% | 77.8% | ▼ 2.8% |
| May | 73.7% | 96.3% | ▲ 30.7% |
| June | 77.3% | 76.9% | ▼ 0.5% |
| July | 75.0% | 82.1% | ▲ 9.5% |
| August | 90.9% | – | – |
| September | 94.1% | – | – |
| October | 87.0% | – | in progress |
| November | 89.5% | – | – |
| December | 85.2% | – | – |
| Year-to-date average (Jan–Jul) | 77.5% | 85.2% | ▲ 9.9% |
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 | 2 | – |
| February | 0 | 2 | – |
| March | 1 | 0 | ▼ 100.0% |
| April | 0 | 1 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 1 | 5 | ▲ 400.0% |
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% 545
- 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 |
|---|---|---|---|---|
| LAX BOS Los Angeles International Airport – Boston Logan International Airport | 4,193 | 10.3 min | 83.2% | 527 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 89.5% | 0 |
| November 2024 | 29 | 29 | 82.8% | 0 |
| December 2024 | 28 | 28 | 82.1% | 0 |
| January 2025 | 30 | 30 | 73.3% | 0 |
| February 2025 | 28 | 28 | 82.1% | 0 |
| March 2025 | 33 | 32 | 81.3% | 1 |
| April 2025 | 30 | 30 | 80.0% | 0 |
| May 2025 | 19 | 19 | 73.7% | 0 |
| June 2025 | 22 | 22 | 77.3% | 0 |
| July 2025 | 24 | 24 | 75.0% | 0 |
| August 2025 | 22 | 22 | 90.9% | 0 |
| September 2025 | 17 | 17 | 94.1% | 0 |
| October 2025 | 23 | 23 | 87.0% | 0 |
| November 2025 | 21 | 19 | 89.5% | 2 |
| December 2025 | 28 | 27 | 85.2% | 1 |
| January 2026 | 23 | 21 | 85.7% | 2 |
| February 2026 | 22 | 20 | 85.0% | 2 |
| March 2026 | 27 | 27 | 92.6% | 0 |
| April 2026 | 28 | 27 | 77.8% | 1 |
| May 2026 | 27 | 27 | 96.3% | 0 |
| June 2026 | 26 | 26 | 76.9% | 0 |
| July 2026 | 28 | 28 | 82.1% | 0 |