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

Monday, August 17th, 2026

7 round-trip options

Returning
Sun, Aug 23, 2026•6 Day Trip
$428 USD
Google Flights
Returning
Mon, Aug 24, 2026•7 Day Trip
$428 USD
Google Flights
Returning
Tue, Aug 25, 2026•8 Day Trip
$397 USD
Google Flights
Returning
Thu, Aug 27, 2026•10 Day Trip
$481 USD
Google Flights
Returning
Fri, Aug 28, 2026•11 Day Trip
$428 USD
Google Flights
Returning
Sat, Aug 29, 2026•12 Day Trip
$397 USD
Google Flights
Returning
Mon, Aug 31, 2026•14 Day Trip
$428 USD
Google Flights