Today offers the most extensive fare sale to Europe in 2016. Low fares in the $500s and $600s are available from hundreds of airports across the USA to dozens of airports across Europe for travel from August to March 2017 with American, Delta and United Airlines.
Here are sample fares from Atlanta, Georgia. Similar fares are found from airports all over the USA today. These fares mostly require 6 or 7 night minimum trip.
Atlanta – Europe Aug 23-30 Oneworld Alliance Google Flights fare map
Atlanta – Europe March 13-20 Star Alliance Google Flights fare map
United Airlines Atlanta – Dublin
$575.76 Mon March 13 – Mon March 20 (St. Patrick’s Day week)
Atlanta – Europe Sep 6-13 SkyTeam Alliance Google Flights fare map
Loyalty Traveler – AA, DL, UA $500s-600s major USA nationwide to Europe fare sale Aug-Mar 2017 (June 27, 2016).