WOW Air via ShermansTravel offers WOW Air 1-Way Flights to Scandinavia and Europe from select cities in the U.S. with prices starting from $99.99. (On the ShermansTravel landing page, click on "WOWAir.com" in the main paragraph to see this sale.) That's the lowest price we could find for select routes by $639. This price is valid on flights departing from Washington, D.C., (BWI), with arrival in Reykjavik, Iceland, (KEF), on December 14. Note that this airline is a "non-bundle" airline, so seat reservation and luggage costs are additional. Other routes include flights to London, England, (LGW); Amsterdam, Netherlands, (AMS); and Paris, France, (CDG). This travel deal applies to flights on select dates through October 31, 2017.

All prices, dates, and booking details were valid at the time of publication.