Originally Posted by
Seat13c
Yes but JetBlue does not fly to Europe. Only way to book and have the bags all the way through is to be flying Lufthansa or AirLingus from JFK to Italy. Otherwise everything will need to rechecked at JFK.
I knew the OP would have to change airlines, but I wasn't sure if single ticketing, or baggage interlining was available. If the OP is on two separate tickets, then any delays on on the SJU-JFK could cause a mis-connect and put them at the mercy of the JFK-Italy airline.