4Y51 PhiladelphiaPHL · 21:40 Frankfurt am MainFRA · 07:35
4Y51 by Discover Airlines flies from Philadelphia (PHL) to Frankfurt am Main (FRA) for the Sun, Sep 13 departure.
departs PHL · 30 min late
board checked 20m ago · checking again in 45s
The route today
live boardsWeather lens
Weather-conditioned outlook for this flight right now
Measured, 90-day sampleDriven mainly by PHL (Philadelphia), 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.
How 4Y51 actually runs
Pro Flight Search has tracked every published board update for 4Y51 across the PHL and FRA boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: landed +2 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how 4Y51 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: DAFYR, DAXGB.
Board clocks recorded as PHL and FRA published them.
Planning around 4Y51? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — 4Y51 Philadelphia to Frankfurt am Main on-time performance, measured from the PHL and FRA airport boards.
https://proflightsearch.com/flight/4Y51
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