B6403 New YorkJFK · 05:01 San JuanSJU · 08:47
B6403 by JetBlue Airways flies from New York (JFK) to San Juan (SJU) for the Tue, Sep 22 departure.
en route from JFK to SJU
board checked 49m ago · checking again in 45s
Board estimate · gate and arrival times. Off blocks 04:54 · typical taxi-out at JFK ≈ 11 min. No receiver coverage over open ocean.
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 · JetBlue AirwaysIf B6403 is cancelled, these are the other JetBlue Airways 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 B6403 actually runs
Pro Flight Search has tracked every published board update for B6403 across the JFK and SJU boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: left about 7 min early but landed about 20 min early. Not enough to call it.
The verdict above is that record speaking, so it reflects how B6403 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: N789JB.
Board clocks recorded as JFK and SJU published them.
Planning around B6403? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — B6403 New York to San Juan on-time performance, measured from the JFK and SJU airport boards.
https://proflightsearch.com/flight/B6403
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