FB67% on time
Flights FB851 varies Mo We Fr Sa Su
live
Direct flights from Sofia (SOF) to London (LHR): 9 nonstop departures observed each week across 2 airlines. 73% of the last 11 operated flights arrived within 15 minutes of schedule. The median arrival is 3 minutes early. 1 of the 11 tracked flights was cancelled. 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 14 September 2026 at 22:28 UTC.
SOF
Sofia
smooth · +0
LHR
London
smooth · +0
2,041 km · ~3h 07m est.
Runs mixed · 2 airlines · 9x weekly · nonstop
73% on time
of the last 11 operated SOF → LHR flights arrived within 15 minutes
Median arrival delay is −3 min. 1 of 11 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival−3 minacross the last 11 operated legs
Flight time~3h 07mestimated from route distance
Weekly departures9x2 direct airlines on the leg
Cancelled9.1%recent route rate · 1 of 11
Who flies it
observed on the boards · 7 daysBritish AirwaysBA80% on time
Flights 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: 30% odds of a 15+ minute delay, 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
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search — Sofia (SOF) to London (LHR) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/SOF-LHR
SOF to LHR questions
Is SOF–LHR running on time right now?
Smooth skies ahead. Both endpoints currently score the same, route health score 100/100. 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.
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