DL797
DL797 (Delta Air Lines) is a multi-stop service on 15 routes, busiest San Antonio to Los Angeles. Of 599 departures recorded from October 2024 to July 2026, 82.5% left on time, according to the US BTS.
- On-time departures82.5%of 599 flights
- Average delay12.4 min
- July 202631▲ 106.7%vs July 2025
- Cancelled1.5%
- Legs flown under this number15
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 | 27 | 57 | ▲ 111.1% |
| February | 28 | 56 | ▲ 100.0% |
| March | 31 | 58 | ▲ 87.1% |
| April | 14 | 18 | ▲ 28.6% |
| May | 42 | 6 | ▼ 85.7% |
| June | 24 | 24 | 0.0% |
| July | 15 | 31 | ▲ 106.7% |
| August | 25 | – | – |
| September | 25 | – | – |
| October | 30 | – | in progress |
| November | 27 | – | – |
| December | 28 | – | – |
| Year to date (Jan–Jul) | 181 | 250 | ▲ 38.1% |
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 | 88.9% | 64.7% | ▼ 27.2% |
| February | 92.9% | 76.8% | ▼ 17.3% |
| March | 93.6% | 91.1% | ▼ 2.7% |
| April | 78.6% | 94.4% | ▲ 20.2% |
| May | 78.6% | 100.0% | ▲ 27.3% |
| June | 79.2% | 83.3% | ▲ 5.3% |
| July | 86.7% | 76.7% | ▼ 11.5% |
| August | 92.0% | – | – |
| September | 92.0% | – | – |
| October | 86.7% | – | in progress |
| November | 85.2% | – | – |
| December | 60.7% | – | – |
| Year-to-date average (Jan–Jul) | 85.5% | 83.9% | ▼ 1.9% |
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 | 6 | – |
| February | 0 | 0 | – |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 9 |
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% 590
- Cancelled 1.5% 9
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SAT LAX San Antonio International Airport – Los Angeles International Airport | 1,945 | 5.4 min | 87.5% | 120 |
| SLC JFK Salt Lake City International Airport – John F. Kennedy International Airport | 3,194 | 8.2 min | 89.8% | 98 |
| SEA ATL Seattle–Tacoma International Airport – Hartsfield Jackson Atlanta International Airport | 3,505 | 32.8 min | 80.5% | 88 |
| MTJ ATL Montrose Regional Airport – Hartsfield Jackson Atlanta International Airport | 2,171 | 13.0 min | 75.0% | 84 |
| ATL MTJ Hartsfield Jackson Atlanta International Airport – Montrose Regional Airport | 2,171 | 5.1 min | 82.5% | 84 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 12 | 12 | 83.3% | 0 |
| November 2024 | 9 | 9 | 66.7% | 0 |
| December 2024 | 12 | 12 | 91.7% | 0 |
| January 2025 | 27 | 27 | 88.9% | 0 |
| February 2025 | 28 | 28 | 92.9% | 0 |
| March 2025 | 31 | 31 | 93.6% | 0 |
| April 2025 | 14 | 14 | 78.6% | 0 |
| May 2025 | 42 | 42 | 78.6% | 0 |
| June 2025 | 24 | 24 | 79.2% | 0 |
| July 2025 | 15 | 15 | 86.7% | 0 |
| August 2025 | 25 | 25 | 92.0% | 0 |
| September 2025 | 25 | 25 | 92.0% | 0 |
| October 2025 | 30 | 30 | 86.7% | 0 |
| November 2025 | 27 | 27 | 85.2% | 0 |
| December 2025 | 28 | 28 | 60.7% | 0 |
| January 2026 | 57 | 51 | 64.7% | 6 |
| February 2026 | 56 | 56 | 76.8% | 0 |
| March 2026 | 58 | 56 | 91.1% | 2 |
| April 2026 | 18 | 18 | 94.4% | 0 |
| May 2026 | 6 | 6 | 100.0% | 0 |
| June 2026 | 24 | 24 | 83.3% | 0 |
| July 2026 | 31 | 30 | 76.7% | 1 |