AS277 PhiladelphiaPHL SeattleSEA
AS277 by Alaska Airlines flies from Philadelphia (PHL) to Seattle (SEA).
scheduled from PHL
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 AS277 is cancelled, these are the other Alaska Airlines nonstop flights 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 AS277 actually runs
Pro Flight Search has tracked every published board update for AS277 across the PHL and SEA boards: schedule changes, gate pushes and actual clocks. Combined risk score: 33.0/100. Based on airport operations, weather, and cached board history at PHL and SEA.
The verdict above is that record speaking, so it reflects how AS277 operates rather than what the timetable promises. Numbers refresh as new flights operate.
Planning around AS277? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — AS277 Philadelphia to Seattle on-time performance, measured from the PHL and SEA airport boards.
https://proflightsearch.com/flight/AS277
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