$398 r/t from West Coast to Europe on WOW Airline, This Summer

With a stop in Iceland, but you can’t really spend any time there. WOW lets you pay extra for a seat with extra legroom, and it charges fees for almost everything.

http://thepointsguy.com/2016/01/lax-and-sfo-to-iceland-and-europe-from-398-round-trip/