Asiana AirlinesOZ60% on time
Flights OZ521 07:50 daily
live
Direct flights from Seoul (ICN) to London (LHR): 21 nonstop departures observed each week across 3 airlines. 67% of the last 18 operated flights arrived within 15 minutes of schedule. The median arrival is on schedule. 1 of the 18 tracked flights was cancelled. The nonstop covers 8,861 km, an estimated 11 hours 52 minutes in the air. Measured by Pro Flight Search from live flight boards at Seoul and London. Updated 11 September 2026 at 04:30 UTC.
ICN
Seoul
busy · +19
LHR
London
smooth · +0
8,861 km · ~11h 52m est.
Runs mixed · 3 airlines · 21x weekly · nonstop
67% on time
of the last 18 operated ICN → LHR flights arrived within 15 minutes
Median arrival delay is +2 min. 1 of 18 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+2 minacross the last 18 operated legs
Flight time~11h 52mestimated from route distance
Weekly departures21x3 direct airlines on the leg
Cancelled5.6%recent route rate · 1 of 18
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Asiana AirlinesKorean AirVirgin Atlantic
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 LHR: 22% 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 Seoul to London route actually runs
Pro Flight Search records official board updates for nonstop ICN 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 — Seoul (ICN) to London (LHR) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/ICN-LHR
ICN to LHR questions
Is ICN–LHR running on time right now?
Smooth skies ahead. The departure side at ICN is the weaker end, route health score 87/100. The airports section above carries the live status and delay window at both ends.
Morning or evening flight on ICN–LHR?
Operators schedule morning departures around 07:50 from ICN. Earlier flights typically land before destination-airport delays accumulate later in the day; check the LHR delay card to confirm conditions when you'd arrive.
How long is the flight from ICN to LHR?
Great-circle distance is 8,861 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 655–790 min gate-to-gate on this route.
How often does ICN–LHR fly?
3 carriers operate this route, around 21 flights a week between them. Compare carrier days and times in the airline list above.
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