jetBlue Airways (B6, New York JFK) is reportedly mulling entering the transatlantic market with flights from the United States East Coast to Ireland, the Irish Independent wrote. 

jetBlue is currently conducting a fleet review and might upgrade some of its sixty ordered AirBlueA321neo to the LR variant and deploy those aircraft on its first European services, the newspaper reported.

According to the ch-aviation schedules module, the only airline offering year-round transatlantic services from Ireland using new-generation narrowbody aircraft is currently Norwegian Air International. The Norwegian LCC flies from each of Dublin Int'l and Shannon to each of Providenceand Newburgh, as well as from Cork to Providence using B737 MAX 8 aircraft. In 2018, WestJet will again deploy its B737-800s on the Toronto Pearson-St. John's-Dublin route, while Air Canada plans to operate Montréal Trudeau-Dublin and Toronto Pearson-Shannon routes with its B737 MAX 8s. 

The ch-aviation capacity module shows that Aer Lingus remains the largest operator of transatlantic services from Ireland with nearly 50% market share by capacity. For its part, the IAG International Airlines Group Irish subsidiary uses a mix of A330-200s, A330-300s, and B757-200s (operated by ASL Airlines Ireland) on its services to North America, but it also placed an order for eight A321neo LRs which it plans to deploy on transatlantic routes. 

jetBlue and Aer Lingus currently have a code-share agreement covering a number of domestic services out of Boston and New York JFK.