SEA to KEF from $589 in economy – flightdeals.net

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Icelandair

Round Trip•Economy

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

Keflavík International Airport

Reykjavik (Keflavik), Iceland

$688 USD

-14%$589 USD

Verified 13 days ago

September 2026

Mon

Tue

Wed

Thu

Fri

Sat

Sun

31$603 1$603 2$603 3$603 4$684 5$603 6$603 7$709 8$603 9$799 10$603 11$603 12$709 13$603 14$603 15$724 16$694 17$680 18$680 19$674 20$589 21$589 22$660 23$589 24$680 25$589 26$589 27$589 28$589 29$589 30$589 1$680 2$589 3$589 4$589

Good Availability

45% of dates checked are available within 10% of the lowest price

Sunday, September 20th, 2026

5 round-trip options

Returning

Sat, Sep 26, 2026•6 Day Trip

$709 USD

Returning

Sun, Sep 27, 2026•7 Day Trip

$709 USD

Returning

Tue, Sep 29, 2026•9 Day Trip

$603 USD

Returning

Thu, Oct 1, 2026•11 Day Trip

$589 USD

Returning

Sun, Oct 4, 2026•14 Day Trip

$589 USD