Icelandair via DealBase offers select Roundtrip Fares to Europe with prices starting at $308.24. (On the DealBase landing page, click "Iceland Air" in the top line to see this sale.) That's the lowest price we could find for select routes by $158. This price is valid on flights departing on February 11, 2019, from Washington, D.C., (IAD) with arrival in Helsinki, Finland, (HEL) and return on February 21, 2019. Book this travel deal by October 21 for travel from January 10, 2019, through May 15, 2019.All prices, dates, and booking details were valid at the time of publication.