PHL to SEA from $337 in economy – flightdeals.net

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United Airlines

UAUnited Airlines

Round Trip•Economy

Philadelphia International Airport

Philadelphia, United States

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

$417 USD

-19%$337 USD

Verified 1 day ago

August 2026

Mon

Tue

Wed

Thu

Fri

Sat

Sun

27 28 29 30 31 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26$488 27$581 28$581 29$415 30$674 31$899 1$420 2$415 3$538 4$538 5$467 6$480

Good Availability

57% of dates checked are available within 10% of the lowest price

Saturday, August 29th, 2026

1 round-trip options

Returning

Sat, Sep 5, 2026•7 Day Trip

$415 USD