Cheapest return flights from Washington to Keflavik in May from $477

AirHint found the following cheapest return flights from Washington (IAD) to Keflavik (KEF) in May 2026 (see full year).

Return flights

23 May - 30 May Icelandair direct
31 May - 06 Jun Icelandair direct
19 May - 27 May Icelandair direct
19 May - 25 May Icelandair direct
20 May - 27 May Icelandair direct
08 May - 15 May Icelandair direct
19 May - 24 May Icelandair direct
20 May - 25 May Icelandair direct
15 May - 17 May Icelandair direct
04 May - 11 May Icelandair direct
12 May - 16 May Icelandair direct
26 May - 02 Jun Icelandair direct
27 May - 03 Jun Icelandair direct
28 May - 04 Jun Icelandair direct
29 May - 05 Jun Icelandair direct
30 May - 06 Jun Icelandair direct
31 May - 07 Jun Icelandair direct
23 May - 05 Jun Icelandair direct

Also check the deals for one-way flights from Washington to Keflavik in May.

Powered by

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik

Feel free to contact us with any feedback or request another flight research.