WOW Air via ShermansTravel offers WOW Air 1-Way Flights to Europe from select cities in the U.S. with prices starting from $45. (On the ShermansTravel landing page, click on "WowAir.US" in the main paragraph to see this sale.) That's the lowest price we've seen for 1-way flights on WOW Air. (It's also the best deal could find for select routes by $167.) This price is valid on flights departing from Boston, MA, (BOS) with arrival in Reykjavik, Iceland, (KEF) on April 19. Note that this airline is a "non-bundle" airline, so seat reservation and luggage costs are additional. Book this travel deal by February 28. All prices, dates, and booking details were valid at the time of publication.
With these companies, it might be easier than you think to negotiate your monthly bill down.