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 16 days ago
Extremely Rare Availability
3% of dates checked are available within 10% of the lowest price

Wednesday, August 5th, 2026

7 round-trip options

Returning
Tue, Aug 11, 2026•6 Day Trip
$307 USD
Google Flights
Returning
Wed, Aug 12, 2026•7 Day Trip
$351 USD
Google Flights
Returning
Thu, Aug 13, 2026•8 Day Trip
$431 USD
Google Flights
Returning
Sat, Aug 15, 2026•10 Day Trip
$336 USD
Google Flights
Returning
Sun, Aug 16, 2026•11 Day Trip
$354 USD
Google Flights
Returning
Mon, Aug 17, 2026•12 Day Trip
$355 USD
Google Flights
Returning
Wed, Aug 19, 2026•14 Day Trip
$307 USD
Google Flights