Another Amazing USA-Europe Airfare, $268+

Just $268 round-trip, as per this post.

http://frequentmiler.boardingarea.com/2016/04/17/lisbon-airfare-deal

Just $340 round-trip, on TAP airline.

http://viewfromthewing.boardingarea.com/2016/04/17/amazing-fare-how-to-book-new-york-europe-for-less-than-340-roundtrip/

Remember to get off at New York on the return, unless you want to finish your trip in Canada.