AS101 LondonLHR · 17:00 SeattleSEA · 19:00
AS101 by Alaska Airlines flies from London (LHR) to Seattle (SEA) for the Mon, Oct 12 departure.
estimated arrival at SEA · local time · ~4h 55m from now
board checked 27m ago · checking again in 45s
Board estimate · gate and arrival times. Off blocks 18:43 · typical taxi-out at LHR ≈ 11.9 min. No receiver coverage over open ocean.
Where the minutes go
last 5 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The last 30 days
arrival outcome per operationmedian arrival +47 min · 0 cancelled · 5 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Early read, sample still buildingConditions at LHR and SEA are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. For this route and airline, under conditions like today's, over the last 90 days. This route's tracked sample is still thin — treat these as an early read, not a precise forecast.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other London to Seattle flights today
same route · Alaska AirlinesIf AS101 is cancelled, this is the other Alaska Airlines nonstop flight from London to Seattle on the same day, with scheduled departure times in LHR local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How AS101 actually runs
Pro Flight Search has tracked every published board update for AS101 across the LHR and SEA boards: schedule changes, gate pushes and actual clocks. Usually departs ~31 min late. Based on 5 confirmed departures · 0/5 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how AS101 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationBoard clocks recorded as LHR and SEA published them.
Planning around AS101? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — AS101 London to Seattle on-time performance, measured from the LHR and SEA airport boards.
https://proflightsearch.com/flight/AS101
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