AS443 PhiladelphiaPHL · 22:59 SeattleSEA · 21:51
AS443 by Alaska Airlines flies from Philadelphia (PHL) to Seattle (SEA) for the Wed, Sep 9 departure.
estimated arrival at SEA · local time · landing about now
board checked 34m ago · checking again in 45s
Board estimate · gate and arrival times. Off blocks 22:38 · typical taxi-out at PHL ≈ 7.6 min. No receiver coverage over open ocean.
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
Measured, 90-day sampleConditions at PHL 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.
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 Philadelphia to Seattle flights today
same route · Alaska AirlinesIf AS443 is cancelled, this is the other Alaska Airlines nonstop flight from Philadelphia to Seattle on the same day, with scheduled departure times in PHL local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How AS443 actually runs
Pro Flight Search has tracked every published board update for AS443 across the PHL and SEA boards: schedule changes, gate pushes and actual clocks. Usually departs ~8 min early. Based on 4 confirmed departures · 4/4 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how AS443 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: N942AK, N469AS, N247AK, N983AK.
Board clocks recorded as PHL and SEA published them.
Planning around AS443? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — AS443 Philadelphia to Seattle on-time performance, measured from the PHL and SEA airport boards.
https://proflightsearch.com/flight/AS443
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