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

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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

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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

Tuesday, September 22nd, 2026

5 round-trip options

Returning

Wed, Sep 30, 2026•8 Day Trip

$627 USD

Returning

Thu, Oct 1, 2026•9 Day Trip

$614 USD

Returning

Fri, Oct 2, 2026•10 Day Trip

$614 USD

Returning

Sat, Oct 3, 2026•11 Day Trip

$614 USD

Returning

Mon, Oct 5, 2026•13 Day Trip

$614 USD