Delta Air Lines discounts Delta Air Lines Roundtrip Flights to Europe from select cities in the U.S., with prices starting from $505.06, as provided by ShermansTravel. (On the ShermansTravel landing page, click on "Delta.com" in the main paragraph to see this sale.) That's the lowest price we could find for select routes by at least $4, although we saw these routes for $107 less last week (since expired). This price is based on departure on January 8, 2017 from Boston, MA, (BOS) with arrival in London, England, (LHR) and return on January 15, 2017. A 28-day advance purchase is required. This sale includes flights to Paris, France, (CDG); Dublin, Ireland, (DUB); Amsterdam, Netherlands, (AMS); and more. Book this travel deal by December 21 for travel from January 8, 2017 through April 6, 2017.

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