Cheap Flights from Philadelphia (PHL) to Seattle (SEA) start at $70 for one-way and $143 for round trip. Earn your airline miles on top of our rewards!

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Philadelphia (PHL) to Seattle (SEA) flight schedule. The monthly calendar shows every direct flight departure from Philadelphia International Airport (PHL) with all airlines. Click on a date to …

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Find the best deals on flights from Philadelphia International (PHL) to Seattle (SEAA). Compare prices from hundreds of major travel agents and airlines, all in one search.