About 1 in 3 DL 1859 flights from New York arrived 15+ minutes late, diverted or cancelled over the past year (34%); 2.2% were cancelled. The typical flight landed 0 minutes early.
DL 1859: JFK → SJU
Scheduled to leave New York at 6:55 p.m. local time. Over the past year it arrived on time 66% of the time (359 flights), in line with other DL flights on the route at that hour (68%). Last seen in the data Aug 31, 2026.
Usually Delta Air Lines's last flight of the day from New York to San Juan (96% of days). Delta Air Lines's last JFK–SJU flight was cancelled 2.2% of the time, against 2.3% for its earlier ones. If it's cancelled, the next Delta Air Lines flight is usually around 8:00 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 60% |
| Tuesday | 49 | 76% |
| Wednesday | 49 | 71% |
| Thursday | 52 | 54% |
| Friday | 52 | 79% |
| Saturday | 52 | 63% |
| Sunday | 52 | 58% |
Why it was late
All flights JFK → SJU · Connecting off DL 1859? Check the risk
Questions
How often is DL 1859 from JFK to SJU late?
Delta Air Lines 1859 from New York, NY to San Juan, PR arrived 15 or more minutes late, was diverted or was cancelled on 34% of 359 scheduled flights between September 2025 and August 2026. 2.2% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check Delta Air Lines for today's flight. Method.