FB851 SofiaSOF · 15:20 LondonLHR · 16:45
FB851 by FB flies from Sofia (SOF) to London (LHR).
scheduled from SOF
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 +0 min · 0 cancelled · 11 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Early read, sample still buildingConditions at SOF and LHR 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. This route's tracked sample is still thin — treat these as an early read, not a precise forecast.
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 FB851 actually runs
Pro Flight Search has tracked every published board update for FB851 across the SOF and LHR boards: schedule changes, gate pushes and actual clocks. Usually lands on time. Based on 11 confirmed landings · 9/11 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how FB851 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 SOF and LHR published them.
Planning around FB851? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — FB851 Sofia to London on-time performance, measured from the SOF and LHR airport boards.
https://proflightsearch.com/flight/FB851
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