Cheapest return flights from Washington to Keflavik in May from $553

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

Return flights

01 May - 08 May Delta
10 May - 17 May Delta
11 May - 18 May Delta
12 May - 19 May Air France
05 May - 16 May Air France
13 May - 20 May Delta
21 May - 25 May Delta
15 May - 17 May Air France
13 May - 29 May Icelandair
19 May - 29 May Icelandair

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.