DL4959 JacksonvilleJAX · 07:05 New YorkJFK · 09:25
DL4959 by Delta Air Lines flies from Jacksonville (JAX) to New York (JFK) for the Sun, Sep 13 departure.
departs JAX · on schedule
board checked 59m ago · checking again in 45s
⚖ DL4959 typically leaves +18 and lands −5. The air wins minutes back.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 −5 min · 0 cancelled · 14 operations tracked
The route today
live boardsWeather lens
Weather-conditioned outlook for this flight right now
Measured, 90-day sampleDriven mainly by JFK (New York), currently flying IFR (instrument). 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 Jacksonville to New York flights today
same route · Delta Air LinesIf DL4959 is cancelled, these are the other Delta Air Lines nonstop flights from Jacksonville to New York on the same day, with scheduled departure times in JAX local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How DL4959 actually runs
Pro Flight Search has tracked every published board update for DL4959 across the JAX and JFK boards: schedule changes, gate pushes and actual clocks. Usually lands ~5 min early. Based on 13 confirmed landings · 12/13 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 DL4959 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: N929XJ, N186PQ, N315PQ, N313PQ.
Board clocks recorded as JAX and JFK published them.
Planning around DL4959? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — DL4959 Jacksonville to New York on-time performance, measured from the JAX and JFK airport boards.
https://proflightsearch.com/flight/DL4959
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