Washington (IAD) to Reykjavik (Keflavik) (KEF) flight deal from $398 USD in economy class

FIIcelandair

Round Trip•Economy

IAD

Washington Dulles International Airport

Washington, United States

KEF

Keflavík International Airport

Reykjavik (Keflavik), Iceland

$636 USD

-37%$398 USD

Verified Nov 6, 2025 at 6:11 AM

December 2025

Today

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Tue

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Sun

1$511 2$408 3$408 4$561 5$541 6$511 7$398 8$398 9$408 10$408 11$526 12$511 13$511 14$431 15$431 16$656 17$656 18$948 19$1,128 20$1,128 21$1,238 22$803 23$916 24$768 25$1,048 26$1,218 27$768 28 29$711 30$563 31$496 1 2 3 4

Fair Availability

20% of dates checked are available within 10% of the lowest price

Tuesday, December 16th, 2025

9 round-trip options

Returning

Sun, Dec 21, 2025•5 Day Trip

$736 USD

Google Flights

Returning

Mon, Dec 22, 2025•6 Day Trip

$711 USD

Google Flights

Returning

Tue, Dec 23, 2025•7 Day Trip

$656 USD

Google Flights

Returning

Wed, Dec 24, 2025•8 Day Trip

$736 USD

Google Flights

Returning

Thu, Dec 25, 2025•9 Day Trip

$711 USD

Google Flights

Returning

Fri, Dec 26, 2025•10 Day Trip

$731 USD

Google Flights

Returning

Sat, Dec 27, 2025•11 Day Trip

$746 USD

Google Flights

Returning

Mon, Dec 29, 2025•13 Day Trip

$858 USD

Google Flights

Returning

Tue, Dec 30, 2025•14 Day Trip

$858 USD

Google Flights