KEF to SEA from $660 in economy – flightdeals.net

Home Premium Fare Deals About

Icelandair

Round Trip•Economy

Keflavík International Airport

Reykjavik (Keflavik), Iceland

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

$710 USD

-7%$660 USD

Verified 13 days ago

December 2026

Mon

Tue

Wed

Thu

Fri

Sat

Sun

30$660 1$660 2$660 3$660 4$660 5$672 6$672 7$660 8$660 9$660 10$660 11$660 12$672 13$672 14$660 15$660 16$660 17$660 18$660 19$672 20$672 21$660 22$660 23$660 24$660 25$660 26$672 27$672 28$660 29$660 30$660 31$660 1$672 2$829 3$693

Great Availability

80% of dates checked are available within 10% of the lowest price

Wednesday, December 23rd, 2026

5 round-trip options

Returning

Thu, Dec 31, 2026•8 Day Trip

$660 USD

Returning

Sat, Jan 2, 2027•10 Day Trip

$660 USD

Returning

Mon, Jan 4, 2027•12 Day Trip

$660 USD

Returning

Tue, Jan 5, 2027•13 Day Trip

$660 USD

Returning

Wed, Jan 6, 2027•14 Day Trip

$660 USD