DL1966
DL1966 (Delta Air Lines) is a multi-stop service on 4 routes, busiest New York to San Juan. Of 809 departures recorded from January 2025 to July 2026, 85.1% left on time, according to the US BTS.
- On-time departures85.1%of 809 flights
- Average delay7.0 min
- July 202662▲ 0.0%vs July 2025
- Cancelled2.1%
- Legs flown under this number4
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 | 6 | 58 | ▲ 866.7% |
| February | 16 | 56 | ▲ 250.0% |
| March | 28 | 62 | ▲ 121.4% |
| April | 10 | 60 | ▲ 500.0% |
| May | 50 | 62 | ▲ 24.0% |
| June | 60 | 60 | 0.0% |
| July | 62 | 62 | 0.0% |
| August | 62 | – | – |
| September | 40 | – | – |
| October | 17 | – | in progress |
| November | 22 | – | – |
| December | 16 | – | – |
| Year to date (Jan–Jul) | 232 | 420 | ▲ 81.0% |
according to the US BTS · January 2025 → 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 | 66.7% | 79.6% | ▲ 19.4% |
| February | 100.0% | 82.4% | ▼ 17.7% |
| March | 67.9% | 85.0% | ▲ 25.3% |
| April | 80.0% | 88.3% | ▲ 10.4% |
| May | 92.0% | 86.7% | ▼ 5.8% |
| June | 95.0% | 88.3% | ▼ 7.0% |
| July | 83.9% | 71.7% | ▼ 14.5% |
| August | 91.9% | – | – |
| September | 90.0% | – | – |
| October | 76.5% | – | in progress |
| November | 77.3% | – | – |
| December | 85.7% | – | – |
| Year-to-date average (Jan–Jul) | 83.6% | 83.1% | ▼ 0.6% |
according to the US BTS · January 2025 → July 2026
Average departure delay by month
according to the US BTS · January 2025 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 4 | – |
| February | 0 | 5 | – |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 0 | 2 | – |
| June | 0 | 0 | – |
| July | 0 | 2 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 0 | 15 |
according to the US BTS · January 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 97.9% 792
- Cancelled 2.1% 17
Share of all recorded flights in the period, all legs. · Jan 11, 2025 → 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 |
|---|---|---|---|---|
| JFK SJU John F. Kennedy International Airport – Luis Munoz Marin International Airport | 2,578 | 3.2 min | 89.7% | 390 |
| SJU JFK Luis Munoz Marin International Airport – John F. Kennedy International Airport | 2,578 | 10.0 min | 82.2% | 349 |
| SJU MSP Luis Munoz Marin International Airport – Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field | 3,872 | 15.4 min | 74.3% | 35 |
| MSP SJU Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field – Luis Munoz Marin International Airport | 3,872 | 10.6 min | 74.3% | 35 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| January 2025 | 6 | 6 | 66.7% | 0 |
| February 2025 | 16 | 16 | 100.0% | 0 |
| March 2025 | 28 | 28 | 67.9% | 0 |
| April 2025 | 10 | 10 | 80.0% | 0 |
| May 2025 | 50 | 50 | 92.0% | 0 |
| June 2025 | 60 | 60 | 95.0% | 0 |
| July 2025 | 62 | 62 | 83.9% | 0 |
| August 2025 | 62 | 62 | 91.9% | 0 |
| September 2025 | 40 | 40 | 90.0% | 0 |
| October 2025 | 17 | 17 | 76.5% | 0 |
| November 2025 | 22 | 22 | 77.3% | 0 |
| December 2025 | 16 | 14 | 85.7% | 2 |
| January 2026 | 58 | 54 | 79.6% | 4 |
| February 2026 | 56 | 51 | 82.4% | 5 |
| March 2026 | 62 | 60 | 85.0% | 2 |
| April 2026 | 60 | 60 | 88.3% | 0 |
| May 2026 | 62 | 60 | 86.7% | 2 |
| June 2026 | 60 | 60 | 88.3% | 0 |
| July 2026 | 62 | 60 | 71.7% | 2 |