Flights AC851 10:15 daily
Direct flights from London (LHR) to Calgary (YYC): 14 nonstop departures observed each week across 2 airlines. 44% of the last 9 operated flights arrived within 15 minutes of schedule. The median arrival is 21 minutes late. 1 of the 9 tracked flights was cancelled. The nonstop covers 7,014 km, an estimated 9 hours 30 minutes in the air. Measured by Pro Flight Search from live flight boards at London and Calgary. Updated 23 September 2026 at 06:26 UTC.
of the last 9 operated LHR → YYC flights arrived within 15 minutes
Median arrival delay is +21 min. 1 of 9 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
The week
scheduled departures · origin local timeEach 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 daysFlights WS1 14:10 daily
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 YYC: 33% odds of a 15+ minute delay and around +6 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 Calgary route actually runs
Pro Flight Search records official board updates for nonstop LHR to YYC 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 — London (LHR) to Calgary (YYC) route reliability, measured from operated flights on official airport boards.
https://proflightsearch.com/search-flights/LHR-YYC
LHR to YYC questions
Is LHR–YYC running on time right now?
Smooth skies ahead. The departure side at LHR 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 LHR–YYC?
Operators schedule morning departures around 10:15 from LHR. Earlier flights typically land before destination-airport delays accumulate later in the day; check the YYC delay card to confirm conditions when you'd arrive.
How long is the flight from LHR to YYC?
Great-circle distance is 7,014 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 525–631 min gate-to-gate on this route.
How often does LHR–YYC fly?
2 carriers operate this route, around 14 flights a week between them. Compare carrier days and times in the airline list above.