Cheap Flights from Philadelphia (PHL) to Seattle (SEA) start at $53 for one-way and $106 for round trip. Earn your airline miles on top of our rewards!

Flights from Philadelphia to Seattle. Use Google Flights to plan your next trip and find cheap one way or round trip flights from Philadelphia to Seattle. Find the best flights fast, track...

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Philadelphia to Seattle. Discover the best prices and deals for you by selecting your travel dates. Only flying one-way? Below are some of the best one-way flight deals from Philadelphia to Seattle found on KAYAK recently.

Are you searching for American Airlines flights from Philadelphia to Seattle? Find the best selections and fly in style.

Searching for cheap flights from Philadelphia to Seattle? Enjoy comfort, premium cabin legroom and free movies with Alaska Airlines. Find the lowest fares today.

Find United Airlines cheap flights from Philadelphia to Seattle. Enjoy a Philadelphia to Seattle modern flight experience in premium cabins with Wi-Fi.

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 see a list of flights or search for the best prices.

Looking for a cheap last-minute deal or the best round-trip flight from Philadelphia to Seattle / Tacoma International? Find the lowest prices on one-way and round-trip tickets right here.

Fly one-way from Philadelphia to Seattle/Tacoma starting at $209. Bundle your Southwest Airlines® flight with a hotel or rental car booking and find even more savings.

Looking for a cheap last-minute deal or the best round-trip flight from Philadelphia to Seattle? Find the lowest prices on one-way and round-trip tickets right here.