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

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Icelandair

Round Trip•Economy

Keflavík International Airport

Reykjavik (Keflavik), Iceland

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

$710 USD

-7%$660 USD

Verified 14 days ago

September 2026

Mon

Tue

Wed

Thu

Fri

Sat

Sun

31$673 1$673 2$673 3$673 4$673 5$673 6$673 7$673 8$673 9$673 10$673 11$673 12$673 13$774 14$938 15$750 16$811 17$707 18$707 19$707 20$707 21$842 22$707 23$811 24$707 25$707 26$707 27$707 28$842 29$707 30$811 1$660 2$660 3$660 4$660

Great Availability

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

Monday, September 21st, 2026

5 round-trip options

Returning

Sat, Sep 26, 2026•5 Day Trip

$842 USD

Returning

Sun, Sep 27, 2026•6 Day Trip

$842 USD

Returning

Mon, Sep 28, 2026•7 Day Trip

$842 USD

Returning

Wed, Sep 30, 2026•9 Day Trip

$842 USD

Returning

Mon, Oct 5, 2026•14 Day Trip

$842 USD