Aer Lingus offers roundtrip flights to Ireland, UK, and Europe with prices starting at $561.28. (Click on "AerLingus" in the top line to see this sale; all taxes are included.) That's the second-best base rate we've seen for Aer Lingus fares this year. It's also the lowest current rate we could find by $65. This price is valid on flights from New York, NY, (JFK) with arrival in Dublin, Ireland, (DUB) departing on February 1, 2015 with return on February 10, 2015; prices vary depending on the departure cities and dates chosen. Book this travel deal by November 20 for travel from December 1, 2014 through March 31, 2015. Click here to see more routes.