DL1864
DL1864 (Delta Air Lines) is a multi-stop service on 4 routes, busiest San Juan to Boston. Of 121 departures recorded from December 2024 to July 2026, 82.2% left on time, according to the US BTS.
- On-time departures82.2%of 121 flights
- Average delay17.9 min
- July 202623
- Cancelled2.5%
- Legs flown under this number4
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods12 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 6 | 8 | ▲ 33.3% |
| February | 8 | 8 | 0.0% |
| March | 10 | 8 | ▼ 20.0% |
| April | 4 | 4 | 0.0% |
| May | – | – | – |
| June | – | 18 | – |
| July | – | 23 | – |
| August | – | – | – |
| September | – | – | – |
| October | 3 | – | in progress |
| November | 3 | – | – |
| December | – | – | – |
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 periods12 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 50.0% | 87.5% | ▲ 75.0% |
| February | 87.5% | 87.5% | 0.0% |
| March | 70.0% | 62.5% | ▼ 10.7% |
| April | 100.0% | 0.0% | ▼ 100.0% |
| May | – | – | – |
| June | – | 88.9% | – |
| July | – | 87.0% | – |
| August | – | – | – |
| September | – | – | – |
| October | 100.0% | – | in progress |
| November | 50.0% | – | – |
| December | – | – | – |
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 periods12 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | – | – | – |
| June | – | 0 | – |
| July | – | 0 | – |
| August | – | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | – | – | – |
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 97.5% 118
- Cancelled 2.5% 3
Share of all recorded flights in the period, all legs. · Dec 1, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SJU BOS Luis Munoz Marin International Airport – Boston Logan International Airport | 2,702 | 20.2 min | 77.8% | 46 |
| DTW IAH Detroit Metropolitan Wayne County Airport – George Bush Intercontinental Airport | 1,731 | 3.7 min | 87.8% | 41 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| December 2024 | 18 | 18 | 100.0% | 0 |
| January 2025 | 6 | 4 | 50.0% | 2 |
| February 2025 | 8 | 8 | 87.5% | 0 |
| March 2025 | 10 | 10 | 70.0% | 0 |
| April 2025 | 4 | 4 | 100.0% | 0 |
| October 2025 | 3 | 3 | 100.0% | 0 |
| November 2025 | 3 | 2 | 50.0% | 1 |
| January 2026 | 8 | 8 | 87.5% | 0 |
| February 2026 | 8 | 8 | 87.5% | 0 |
| March 2026 | 8 | 8 | 62.5% | 0 |
| April 2026 | 4 | 4 | 0.0% | 0 |
| June 2026 | 18 | 18 | 88.9% | 0 |
| July 2026 | 23 | 23 | 87.0% | 0 |