Flights FB851 varies Mo We Fr Sa Su
Direct flights from Sofia (SOF) to London (LHR): 9 nonstop departures observed each week across 2 airlines. 100% of the last 7 operated flights arrived within 15 minutes of schedule. The median arrival is 14 minutes early. No cancellations were recorded across the 7 tracked flights. The nonstop covers 2,041 km, an estimated 3 hours 7 minutes in the air. Measured by Pro Flight Search from live flight boards at Sofia and London. Updated 26 October 2026 at 01:23 UTC.
of the last 7 operated SOF → LHR flights arrived within 15 minutes
Median arrival delay is −14 min. 0 of 7 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Who flies it
observed on the boards · 7 daysFlights BA893 varies Mo We Fr Su
History
operated legs · board outcomesActual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsWeather lens
Current conditions put the pressure at SOF and LHR: 27% odds of a 15+ minute delay and around +3 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →
next sweep in 120s
How the Sofia to London route actually runs
Pro Flight Search records official board updates for nonstop SOF to LHR flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Pro Flight Search — Sofia (SOF) to London (LHR) route reliability, measured from operated flights on official airport boards.
https://proflightsearch.com/search-flights/SOF-LHR
SOF to LHR questions
Is SOF–LHR running on time right now?
Smooth skies ahead. The arrival side at LHR is the weaker end, route health score 96/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from SOF to LHR?
Great-circle distance is 2,041 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 174–205 min gate-to-gate on this route.
How often does SOF–LHR fly?
2 carriers operate this route, around 9 flights a week between them. Compare carrier days and times in the airline list above.
What does the route health score measure?
A blend of departure-side delay at SOF and arrival-side delay at LHR, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.