AS459 BostonBOS · 07:03 SeattleSEA · 10:20
AS459 by Alaska Airlines flies from Boston (BOS) to Seattle (SEA) for the Fri, Oct 9 departure.
arrival expected at SEA · on schedule
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 BOS 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 Boston to Seattle flights today
same route · Alaska AirlinesIf AS459 is cancelled, these are the other Alaska Airlines nonstop flights from Boston to Seattle on the same day, with scheduled departure times in BOS local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How AS459 actually runs
Pro Flight Search has tracked every published board update for AS459 across the BOS and SEA boards: schedule changes, gate pushes and actual clocks. Usually lands ~9 min late. Based on 1 confirmed landing · 1/1 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how AS459 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: N941AK.
Board clocks recorded as BOS and SEA published them.
Planning around AS459? 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 — AS459 Boston to Seattle on-time performance, measured from the BOS and SEA airport boards.
https://proflightsearch.com/flight/AS459
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