DL1979
DL1979 (Delta Air Lines) is a multi-stop service on 3 routes, busiest Atlanta to San Antonio. Of 442 departures recorded from June 2025 to July 2026, 83.2% left on time, according to the US BTS.
- On-time departures83.2%of 442 flights
- Average delay4.7 min
- July 202631▼ 32.6%vs July 2025
- Cancelled0.5%
- Legs flown under this number3
Recorded departures by month
Short series — DL1979 has only 10 months so far. Enough to show the level now, not enough to read a trend.
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods10 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | – | – |
| February | – | – | – |
| March | – | – | – |
| April | – | – | – |
| May | – | 26 | – |
| June | 35 | 30 | ▼ 14.3% |
| July | 46 | 31 | ▼ 32.6% |
| August | 58 | – | – |
| September | 60 | – | – |
| October | 61 | – | in progress |
| November | 57 | – | – |
| December | 38 | – | – |
according to the US BTS · June 2025 → July 2026
On-time departures by month
Short series — DL1979 has only 10 months so far. Enough to show the level now, not enough to read a trend.
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods10 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | – | – |
| February | – | – | – |
| March | – | – | – |
| April | – | – | – |
| May | – | 92.3% | – |
| June | 60.0% | 100.0% | ▲ 66.7% |
| July | 58.7% | 93.6% | ▲ 59.4% |
| August | 91.4% | – | – |
| September | 95.0% | – | – |
| October | 80.3% | – | in progress |
| November | 87.5% | – | – |
| December | 73.7% | – | – |
according to the US BTS · June 2025 → July 2026
Average departure delay by month
Short series — DL1979 has only 10 months so far. Enough to show the level now, not enough to read a trend.
Months without data are left blank.
according to the US BTS · June 2025 → July 2026
Cancelled departures by month
Short series — DL1979 has only 10 months so far. Enough to show the level now, not enough to read a trend.
Months without data are left blank.
The most recent periods10 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | – | – |
| February | – | – | – |
| March | – | – | – |
| April | – | – | – |
| May | – | 0 | – |
| June | 0 | 1 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
according to the US BTS · June 2025 → 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 99.5% 440
- Cancelled 0.5% 2
Share of all recorded flights in the period, all legs. · Jun 8, 2025 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ATL SAT Hartsfield Jackson Atlanta International Airport – San Antonio International Airport | 1,405 | 5.6 min | 80.4% | 194 |
| SAT ATL San Antonio International Airport – Hartsfield Jackson Atlanta International Airport | 1,405 | 7.4 min | 80.0% | 161 |
| BHM ATL Birmingham-Shuttlesworth International Airport – Hartsfield Jackson Atlanta International Airport | 215 | -2.6 min | 95.4% | 87 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| June 2025 | 35 | 35 | 60.0% | 0 |
| July 2025 | 46 | 46 | 58.7% | 0 |
| August 2025 | 58 | 58 | 91.4% | 0 |
| September 2025 | 60 | 60 | 95.0% | 0 |
| October 2025 | 61 | 61 | 80.3% | 0 |
| November 2025 | 57 | 56 | 87.5% | 1 |
| December 2025 | 38 | 38 | 73.7% | 0 |
| May 2026 | 26 | 26 | 92.3% | 0 |
| June 2026 | 30 | 29 | 100.0% | 1 |
| July 2026 | 31 | 31 | 93.6% | 0 |