RyanairFR80% on time
Flights FR1730 varies Mo Tu We Th Fr Sa · FR2690 varies Mo Th Sa Su · FR9961 varies Mo Tu We Fr · FR8515 11:50 Fr Su
live
Direct flights from London (STN) to Sofia (SOF): 7 nonstop departures observed each week across 1 airline. 80% of the last 10 operated flights arrived within 15 minutes of schedule. The median arrival is 3 minutes late. No cancellations were recorded across the 10 tracked flights. The nonstop covers 2,012 km, an estimated 3 hours 5 minutes in the air. Measured by Pro Flight Search from live flight boards at London and Sofia. Updated 13 September 2026 at 19:08 UTC.
STN
London
smooth · +10
SOF
Sofia
smooth · +0
2,012 km · ~3h 05m est.
Runs reliable · 1 airline · 7x weekly · nonstop
80% on time
of the last 10 operated STN → SOF flights arrived within 15 minutes
Median arrival delay is +3 min. 0 of 10 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+3 minacross the last 10 operated legs
Flight time~3h 05mestimated from route distance
Weekly departures7x1 direct airline on the leg
Cancelled0.0%recent route rate · 0 of 10
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Ryanair
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysHistory
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 STN: 38% odds of a 15+ minute delay and around +11 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 London to Sofia route actually runs
Pro Flight Search records official board updates for nonstop STN to SOF 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 — London (STN) to Sofia (SOF) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/STN-SOF
STN to SOF questions
Is STN–SOF running on time right now?
Smooth skies ahead. The departure side at STN is the weaker end, route health score 93/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from STN to SOF?
Great-circle distance is 2,012 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 172–202 min gate-to-gate on this route.
How often does STN–SOF fly?
Ryanair runs the route with about 16 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.
What does the route health score measure?
A blend of departure-side delay at STN and arrival-side delay at SOF, 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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