Cheapest return flights from Washington to Keflavik in September from 489€

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

Return flights

12 Sep - 24 Sep United
03 Sep - 07 Sep Air Canada
27 Sep - 30 Sep Air Canada

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

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.