AS100 SeattleSEA · 21:40 LondonLHR · 15:05
AS100 by Alaska Airlines flies from Seattle (SEA) to London (LHR) for the Tue, Sep 22 departure.
departs SEA · on schedule
board checked 17m ago · checking again in 45s
Where the minutes go
last 4 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Early read, sample still buildingConditions at SEA and LHR 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.
How AS100 actually runs
Pro Flight Search has tracked every published board update for AS100 across the SEA and LHR boards: schedule changes, gate pushes and actual clocks. Usually lands ~120 min late. Based on 4 confirmed landings · 2/4 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how AS100 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationAircraft
Recent tails: N783HA.
Board clocks recorded as SEA and LHR published them.
Planning around AS100? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — AS100 Seattle to London on-time performance, measured from the SEA and LHR airport boards.
https://proflightsearch.com/flight/AS100
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