JetBlue is celebrating its new routes between New York City and the Cayman Islands, and between Boston and the Cayman Islands, by putting fares on sale now for travel this fall and winter. Through July 28th, buy one-way tickets between JFK Airport and Grand Cayman for $138, and between Logan Airport and Grand Cayman for $159. The sale fares are for travel between mid-November, when the flights begin, and February 11, 2013, with black-out dates over the peak holiday period. JetBlue will serve Grand Cayman with three times weekly service on Mondays, Thursdays and Saturdays from New York’s JFK, and Saturday-only service from Boston’s Logan. Be sure to check the Daily Deals Round-up page for hotel deals in the Caribbean.