FB852 LondonLHR · 17:55 SofiaSOF · 23:15
FB852 by Bulgaria Air flies from London (LHR) to Sofia (SOF) for the Fri, Sep 25 departure.
departs LHR · on schedule
board checked 10m ago · checking again in 45s
⚖ FB852 typically leaves +15 and lands −29. 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 −29 min · 0 cancelled · 10 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at LHR and SOF 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 FB852 actually runs
Pro Flight Search has tracked every published board update for FB852 across the LHR and SOF boards: schedule changes, gate pushes and actual clocks. Usually lands ~29 min early. Based on 7 confirmed landings · 7/7 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 FB852 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: LZ-AMS.
Board clocks recorded as LHR and SOF published them.
Planning around FB852? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — FB852 London to Sofia on-time performance, measured from the LHR and SOF airport boards.
https://proflightsearch.com/flight/FB852
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