PHL to SEA from $329 in economy

DLDelta Air Lines

Round Trip•Economy

PHL

Philadelphia International Airport

Philadelphia, United States

SEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

$399 USD

-18%$329 USD

Verified 13 days ago

July 2026

Today

Mon

Tue

Wed

Thu

Fri

Sat

Sun

29 30 1 2 3 4 5 6$474 7$437 8$447 9$484 10$474 11$437 12$538 13$484 14$533 15$483 16$469 17$533 18$493 19$523 20$479 21$432 22$493 23$469 24$504 25$454 26$463 27$388 28$447 29$413 30$533 31$473 1$543 2$423

Great Availability

69% of dates checked are available within 10% of the lowest price

Sunday, July 12th, 2026

7 round-trip options

Returning

Fri, Jul 17, 2026•5 Day Trip

$647 USD

Google Flights

Returning

Sun, Jul 19, 2026•7 Day Trip

$678 USD

Google Flights

Returning

Tue, Jul 21, 2026•9 Day Trip

$538 USD

Google Flights

Returning

Thu, Jul 23, 2026•11 Day Trip

$585 USD

Google Flights

Returning

Fri, Jul 24, 2026•12 Day Trip

$575 USD

Google Flights

Returning

Sat, Jul 25, 2026•13 Day Trip

$688 USD

Google Flights

Returning

Sun, Jul 26, 2026•14 Day Trip

$608 USD

Google Flights

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

Philadelphia International Airport

Seattle–Tacoma International Airport

July 2026

Sunday, July 12th, 2026