DL1791
DL1791 (Delta Air Lines) is a multi-stop service on 3 routes, busiest Atlanta to San Juan. Of 530 departures recorded from December 2024 to July 2026, 67.4% left on time, according to the US BTS.
- On-time departures67.4%of 530 flights
- Average delay24.7 min
- July 202622▼ 29.0%vs July 2025
- Cancelled0.9%
- Legs flown under this number3
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 17 | 21 | ▲ 23.5% |
| February | 16 | 28 | ▲ 75.0% |
| March | 31 | 31 | 0.0% |
| April | 24 | 30 | ▲ 25.0% |
| May | 29 | 31 | ▲ 6.9% |
| June | 30 | 21 | ▼ 30.0% |
| July | 31 | 22 | ▼ 29.0% |
| August | 3 | – | – |
| September | – | – | – |
| October | 52 | – | in progress |
| November | 50 | – | – |
| December | 50 | – | – |
| Year to date (Jan–Jul) | 178 | 184 | ▲ 3.4% |
according to the US BTS · December 2024 → July 2026
On-time departures by month
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 periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 70.6% | 70.0% | ▼ 0.8% |
| February | 75.0% | 78.6% | ▲ 4.8% |
| March | 64.5% | 77.4% | ▲ 20.0% |
| April | 66.7% | 73.3% | ▲ 10.0% |
| May | 65.5% | 74.2% | ▲ 13.2% |
| June | 63.3% | 66.7% | ▲ 5.3% |
| July | 71.0% | 54.6% | ▼ 23.1% |
| August | 66.7% | – | – |
| September | – | – | – |
| October | 58.8% | – | in progress |
| November | 68.0% | – | – |
| December | 61.7% | – | – |
| Year-to-date average (Jan–Jul) | 68.1% | 70.7% | ▲ 3.8% |
according to the US BTS · December 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · December 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 3 | – | – |
| Year to date (Jan–Jul) | 0 | 1 |
according to the US BTS · December 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 99.1% 525
- Cancelled 0.9% 5
Share of all recorded flights in the period, all legs. · Dec 19, 2024 → 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 SJU Hartsfield Jackson Atlanta International Airport – Luis Munoz Marin International Airport | 2,491 | 19.9 min | 69.2% | 390 |
| LGA TPA LaGuardia Airport – Tampa International Airport | 1,628 | 16.3 min | 76.7% | 75 |
| TPA LGA Tampa International Airport – LaGuardia Airport | 1,628 | 63.9 min | 46.0% | 65 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| December 2024 | 13 | 13 | 61.5% | 0 |
| January 2025 | 17 | 17 | 70.6% | 0 |
| February 2025 | 16 | 16 | 75.0% | 0 |
| March 2025 | 31 | 31 | 64.5% | 0 |
| April 2025 | 24 | 24 | 66.7% | 0 |
| May 2025 | 29 | 29 | 65.5% | 0 |
| June 2025 | 30 | 30 | 63.3% | 0 |
| July 2025 | 31 | 31 | 71.0% | 0 |
| August 2025 | 3 | 3 | 66.7% | 0 |
| October 2025 | 52 | 51 | 58.8% | 1 |
| November 2025 | 50 | 50 | 68.0% | 0 |
| December 2025 | 50 | 47 | 61.7% | 3 |
| January 2026 | 21 | 20 | 70.0% | 1 |
| February 2026 | 28 | 28 | 78.6% | 0 |
| March 2026 | 31 | 31 | 77.4% | 0 |
| April 2026 | 30 | 30 | 73.3% | 0 |
| May 2026 | 31 | 31 | 74.2% | 0 |
| June 2026 | 21 | 21 | 66.7% | 0 |
| July 2026 | 22 | 22 | 54.6% | 0 |