Philadelphia (PHL) to Seattle / Tacoma (SEA) flight deal from $139 USD in economy class – flightdeals.net

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Alaska Airlines, Inc.

ASAlaska Airlines, Inc.

One Way•Economy

Philadelphia International Airport

Philadelphia, United States

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

$245 USD

-43%$139 USD

Verified Nov 30, 2025 at 8:32 AM

January 2026

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29$519 30$439 31$379 1$379 2$439 3$519 4$439 5$309 6$274 7$139 8$159 9$159 10$139 11$159 12$159 13$139 14$179 15$159 16$159 17$139 18$199 19$274 20$139 21$139 22$159 23$159 24$139 25$159 26$159 27$139 28$139 29$159 30$159 31$139 1

Limited Availability

16% of dates checked are available within 10% of the lowest price

Tuesday, January 6th, 2026

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