SEA to KEF from $518 in economy

AFAir France

DLDelta Air Lines

KLKLM

Round Trip•Economy

SEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

KEF

Keflavík International Airport

Reykjavik (Keflavik), Iceland

$778 USD

-33%$518 USD

Verified about 20 hours ago

September 2026

Today

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

Friday, September 18th, 2026

5 round-trip options

Returning

Sat, Sep 26, 2026•8 Day Trip

$627 USD

Google Flights

Returning

Sun, Sep 27, 2026•9 Day Trip

$627 USD

Google Flights

Returning

Mon, Sep 28, 2026•10 Day Trip

$627 USD

Google Flights

Returning

Tue, Sep 29, 2026•11 Day Trip

$627 USD

Google Flights

Returning

Thu, Oct 1, 2026•13 Day Trip

$614 USD

Google Flights

Seattle / Tacoma (SEA) to Reykjavik (Keflavik) (KEF) flight deal in economy from $518

Seattle–Tacoma International Airport

Keflavík International Airport

September 2026

Friday, September 18th, 2026