Seattle / Tacoma (SEA) to Philadelphia (PHL) flight deal in economy from $273

United AirlinesUAUnited Airlines
Round Trip•Economy
United StatesSEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States
United StatesPHL

Philadelphia International Airport

Philadelphia, United States
$399 USD
-32%$273 USD
Verified 17 days ago
Extremely Rare Availability
3% of dates checked are available within 10% of the lowest price

Sunday, October 18th, 2026

6 round-trip options

Returning
Fri, Oct 23, 2026•5 Day Trip
$335 USD
Google Flights
Returning
Sat, Oct 24, 2026•6 Day Trip
$304 USD
Google Flights
Returning
Sun, Oct 25, 2026•7 Day Trip
$432 USD
Google Flights
Returning
Tue, Oct 27, 2026•9 Day Trip
$342 USD
Google Flights
Returning
Thu, Oct 29, 2026•11 Day Trip
$342 USD
Google Flights
Returning
Sat, Oct 31, 2026•13 Day Trip
$342 USD
Google Flights