DL1859 New YorkJFK · 19:28 San JuanSJU · 23:52
DL1859 by Delta Air Lines flies from New York (JFK) to San Juan (SJU) for the Fri, Aug 21 departure.
estimated arrival at SJU · local time · ~2h 39m from now
position updated 3m ago · checking again in 90s
Live position · flown path, last 42 min
Where the minutes go
last 7 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The last 30 days
arrival outcome per operationmedian arrival −6 min · 0 cancelled · 13 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at JFK and SJU are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. For this route and airline, under conditions like today's, over the last 90 days.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other New York to San Juan flights today
same route · Delta Air LinesIf DL1859 is cancelled, these are the other Delta Air Lines nonstop flights from New York to San Juan on the same day, with scheduled departure times in JFK local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How DL1859 actually runs
Pro Flight Search has tracked every published board update for DL1859 across the JFK and SJU boards: schedule changes, gate pushes and actual clocks. Usually lands ~6 min early. Based on 12 confirmed landings · 9/12 within 15 min of schedule. Pushes back late but makes up time in the air.
The verdict above is that record speaking, so it reflects how DL1859 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationAircraft
Recent tails: N507DZ, N525DA, N520DE, N516DA.
Board clocks recorded as JFK and SJU published them.
Planning around DL1859? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Pro Flight Search — DL1859 New York to San Juan on-time performance, measured from the JFK and SJU airport boards.
https://proflightsearch.com/flight/DL1859
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