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

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About Premium Fare Deals

Alaska Airlines, Inc.

ASAlaska Airlines, Inc.

One Way•Economy

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

Philadelphia International Airport

Philadelphia, United States

$221 USD

-37%$139 USD

Verified 2 days ago

September 2025

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1$229 2$229 3$189 4$139 5$139 6$229 7$189 8$139 9$139 10$139 11$139 12$139 13$299 14$189 15$189 16$189 17$189 18$139 19$139 20$229 21$189 22$139 23$139 24$189 25$229 26$139 27$189 28$189 29$189 30$189 1$189 2$229 3$189 4$189 5$139

Fair Availability

24% of dates checked are available within 10% of the lowest price

Thursday, September 4th, 2025

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