SEA to KEF from $518 in economy – flightdeals.net

Home Premium Fare Deals About

Air France

Delta Air Lines

DLDelta Air Lines

KLM

Round Trip•Economy

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

Keflavík International Airport

Reykjavik (Keflavik), Iceland

$778 USD

-33%$518 USD

Verified about 17 hours ago

September 2026

Mon

Tue

Wed

Thu

Fri

Sat

Sun

31$627 1$1,050 2$627 3$744 4$744 5$636 6$627 7$627 8$627 9$627 10$627 11$627 12$627 13$627 14$627 15$627 16$627 17$627 18$614 19$614 20$614 21$614 22$614 23$614 24$614 25$614 26$614 27$614 28$614 29$614 30$614 1 2 3 4

Limited Availability

12% of dates checked are available within 10% of the lowest price

Monday, September 28th, 2026

5 round-trip options

Returning

Tue, Oct 6, 2026•8 Day Trip

$614 USD

Returning

Wed, Oct 7, 2026•9 Day Trip

$614 USD

Returning

Thu, Oct 8, 2026•10 Day Trip

$614 USD

Returning

Fri, Oct 9, 2026•11 Day Trip

$614 USD

Returning

Sun, Oct 11, 2026•13 Day Trip

$995 USD