DL78 New YorkJFK · 18:45 PraguePRG · 09:00
DL78 by Delta Air Lines flies from New York (JFK) to Prague (PRG) for the Wed, Sep 16 departure.
departs JFK · on schedule
board checked 47m ago · checking again in 45s
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at JFK and PRG 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.
How DL78 actually runs
Pro Flight Search has tracked every published board update for DL78 across the JFK and PRG boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: left a little late (~18 min) but landed about 56 min early. Not enough to call it.
The verdict above is that record speaking, so it reflects how DL78 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationBoard clocks recorded as JFK and PRG published them.
Planning around DL78? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — DL78 New York to Prague on-time performance, measured from the JFK and PRG airport boards.
https://proflightsearch.com/flight/DL78
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