SEA to PHL from $137 in economy – flightdeals.net

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United Airlines

UAUnited Airlines

One Way•Economy

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

Philadelphia International Airport

Philadelphia, United States

$193 USD

-29%$137 USD

Verified about 8 hours ago

September 2026

Mon

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Sun

31$156 1$164 2$137 3$176 4$168 5$137 6$192 7$279 8$260 9$137 10$161 11$168 12$137 13$168 14$156 15$137 16$137 17$176 18$168 19$137 20$168 21$156 22$137 23$137 24$156 25$168 26$137 27$168 28$156 29$137 30$137 1$156 2$168 3$137 4$168

Rare Availability

9% of dates checked are available within 10% of the lowest price

Wednesday, September 2nd, 2026

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