DL816
DL816 (Delta Air Lines) is a multi-stop service on 5 routes, busiest San Antonio to Boston. Of 671 departures recorded from October 2024 to July 2026, 70.6% left on time, according to the US BTS.
- On-time departures70.6%of 671 flights
- Average delay23.1 min
- July 202662▲ 106.7%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 | 22 | 31 | ▲ 40.9% |
| February | 22 | 28 | ▲ 27.3% |
| March | 26 | 31 | ▲ 19.2% |
| April | 26 | 30 | ▲ 15.4% |
| May | 31 | 31 | 0.0% |
| June | 30 | 54 | ▲ 80.0% |
| July | 30 | 62 | ▲ 106.7% |
| August | 30 | – | – |
| September | 30 | – | – |
| October | 30 | – | in progress |
| November | 28 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 187 | 267 | ▲ 42.8% |
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 | 63.6% | 70.0% | ▲ 10.0% |
| February | 81.8% | 81.5% | ▼ 0.4% |
| March | 69.2% | 80.7% | ▲ 16.5% |
| April | 76.9% | 75.9% | ▼ 1.4% |
| May | 56.7% | 83.9% | ▲ 48.0% |
| June | 65.5% | 71.4% | ▲ 9.0% |
| July | 73.3% | 59.7% | ▼ 18.6% |
| August | 76.7% | – | – |
| September | 36.7% | – | – |
| October | 40.0% | – | in progress |
| November | 74.1% | – | – |
| December | 74.2% | – | – |
| Year-to-date average (Jan–Jul) | 69.6% | 74.7% | ▲ 7.4% |
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 | 1 | – |
| February | 0 | 1 | – |
| March | 0 | 0 | – |
| April | 0 | 1 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 1 | 5 | ▲ 400.0% |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 8 | ▲ 300.0% |
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% 660
- Cancelled 1.6% 11
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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SAT BOS San Antonio International Airport – Boston Logan International Airport | 2,835 | 26.9 min | 66.5% | 501 |
| ATL PDX Hartsfield Jackson Atlanta International Airport – Portland International Airport | 3,489 | 2.9 min | 89.7% | 68 |
| BOS SAT Boston Logan International Airport – San Antonio International Airport | 2,835 | 30.6 min | 71.7% | 55 |
| MCO LAX Orlando International Airport – Los Angeles International Airport | 3,562 | 3.3 min | 86.7% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 30 | 30 | 93.3% | 0 |
| December 2024 | 18 | 18 | 77.8% | 0 |
| January 2025 | 22 | 22 | 63.6% | 0 |
| February 2025 | 22 | 22 | 81.8% | 0 |
| March 2025 | 26 | 26 | 69.2% | 0 |
| April 2025 | 26 | 26 | 76.9% | 0 |
| May 2025 | 31 | 30 | 56.7% | 1 |
| June 2025 | 30 | 29 | 65.5% | 1 |
| July 2025 | 30 | 30 | 73.3% | 0 |
| August 2025 | 30 | 30 | 76.7% | 0 |
| September 2025 | 30 | 30 | 36.7% | 0 |
| October 2025 | 30 | 30 | 40.0% | 0 |
| November 2025 | 28 | 27 | 74.1% | 1 |
| December 2025 | 31 | 31 | 74.2% | 0 |
| January 2026 | 31 | 30 | 70.0% | 1 |
| February 2026 | 28 | 27 | 81.5% | 1 |
| March 2026 | 31 | 31 | 80.7% | 0 |
| April 2026 | 30 | 29 | 75.9% | 1 |
| May 2026 | 31 | 31 | 83.9% | 0 |
| June 2026 | 54 | 49 | 71.4% | 5 |
| July 2026 | 62 | 62 | 59.7% | 0 |