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

Monday, July 13th, 2026

7 round-trip options

Returning

Sat, Jul 18, 2026•5 Day Trip

$739 USD

Google Flights

Returning

Mon, Jul 20, 2026•7 Day Trip

$531 USD

Google Flights

Returning

Wed, Jul 22, 2026•9 Day Trip

$484 USD

Google Flights

Returning

Fri, Jul 24, 2026•11 Day Trip

$521 USD

Google Flights

Returning

Sat, Jul 25, 2026•12 Day Trip

$634 USD

Google Flights

Returning

Sun, Jul 26, 2026•13 Day Trip

$554 USD

Google Flights

Returning

Mon, Jul 27, 2026•14 Day Trip

$504 USD

Google Flights

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

Philadelphia International Airport

Seattle–Tacoma International Airport

July 2026

Monday, July 13th, 2026