DL1879
DL1879 (Delta Air Lines) is a multi-stop service on 2 routes, busiest San Juan to Atlanta. Of 381 departures recorded from December 2024 to July 2026, 93.9% left on time, according to the US BTS.
- On-time departures93.9%of 381 flights
- Average delay-0.2 min
- July 202621▼ 32.3%vs July 2025
- Cancelled0.8%
- Legs flown under this number2
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 | 18 | 17 | ▼ 5.6% |
| February | 15 | 17 | ▲ 13.3% |
| March | 31 | 31 | 0.0% |
| April | 25 | 30 | ▲ 20.0% |
| May | 30 | 31 | ▲ 3.3% |
| June | 30 | 22 | ▼ 26.7% |
| July | 31 | 21 | ▼ 32.3% |
| August | 4 | – | – |
| September | – | – | – |
| October | 3 | – | in progress |
| November | 2 | – | – |
| December | 11 | – | – |
| Year to date (Jan–Jul) | 180 | 169 | ▼ 6.1% |
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 | 94.4% | 93.8% | ▼ 0.7% |
| February | 100.0% | 94.1% | ▼ 5.9% |
| March | 93.6% | 90.3% | ▼ 3.5% |
| April | 92.0% | 100.0% | ▲ 8.7% |
| May | 93.3% | 96.7% | ▲ 3.6% |
| June | 90.0% | 95.5% | ▲ 6.1% |
| July | 96.8% | 100.0% | ▲ 3.3% |
| August | 100.0% | – | – |
| September | – | – | – |
| October | 100.0% | – | in progress |
| November | 0.0% | – | – |
| December | 81.8% | – | – |
| Year-to-date average (Jan–Jul) | 94.3% | 95.8% | ▲ 1.5% |
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 | 1 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 1 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 2 |
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 99.2% 378
- Cancelled 0.8% 3
Share of all recorded flights in the period, all legs. · Dec 20, 2024 → Jul 31, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SJU ATL Luis Munoz Marin International Airport – Hartsfield Jackson Atlanta International Airport | 2,491 | -0.3 min | 94.4% | 376 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| December 2024 | 12 | 12 | 91.7% | 0 |
| January 2025 | 18 | 18 | 94.4% | 0 |
| February 2025 | 15 | 15 | 100.0% | 0 |
| March 2025 | 31 | 31 | 93.6% | 0 |
| April 2025 | 25 | 25 | 92.0% | 0 |
| May 2025 | 30 | 30 | 93.3% | 0 |
| June 2025 | 30 | 30 | 90.0% | 0 |
| July 2025 | 31 | 31 | 96.8% | 0 |
| August 2025 | 4 | 3 | 100.0% | 1 |
| October 2025 | 3 | 3 | 100.0% | 0 |
| November 2025 | 2 | 2 | 0.0% | 0 |
| December 2025 | 11 | 11 | 81.8% | 0 |
| January 2026 | 17 | 16 | 93.8% | 1 |
| February 2026 | 17 | 17 | 94.1% | 0 |
| March 2026 | 31 | 31 | 90.3% | 0 |
| April 2026 | 30 | 30 | 100.0% | 0 |
| May 2026 | 31 | 30 | 96.7% | 1 |
| June 2026 | 22 | 22 | 95.5% | 0 |
| July 2026 | 21 | 21 | 100.0% | 0 |