Aer Lingus offers roundtrip flights to Ireland, UK, and Europe with prices starting at $693.58. (Click on "Aer Lingus" in the top line to see this sale; all taxes are included.) That's the lowest current rate we could find by $32. This price is valid on flights from New York, NY, (JFK) with arrival in Shannon, Ireland, (SNN) departing on September 11 with return on September 18; prices vary depending on the departure cities and dates chosen. Book this travel deal by April 28 for travel from September 1 through October 31. Other notable fares:

Boston (BOS) to Shannon (SNN) from $693.58

New York (JFK) to Dublin (DUB) from $725.51

Chicago (ORD) to Dublin (DUB) from $795.51

see all available Aer Lingus fares to Europe

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