Seattle / Tacoma (SEA) to Philadelphia (PHL) flight deal in economy from $329

Delta Air LinesDLDelta Air Lines
Round Trip•Economy
United StatesSEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States
United StatesPHL

Philadelphia International Airport

Philadelphia, United States
$401 USD
-18%$329 USD
Verified 16 days ago
Great Availability
68% of dates checked are available within 10% of the lowest price

Tuesday, December 29th, 2026

7 round-trip options

Returning
Sun, Jan 3, 2027•5 Day Trip
$533 USD
Google Flights
Returning
Mon, Jan 4, 2027•6 Day Trip
$349 USD
Google Flights
Returning
Wed, Jan 6, 2027•8 Day Trip
$349 USD
Google Flights
Returning
Fri, Jan 8, 2027•10 Day Trip
$349 USD
Google Flights
Returning
Sun, Jan 10, 2027•12 Day Trip
$349 USD
Google Flights
Returning
Mon, Jan 11, 2027•13 Day Trip
$349 USD
Google Flights
Returning
Tue, Jan 12, 2027•14 Day Trip
$349 USD
Google Flights