DL 245 then B6 1603 at JFK
Catania → New York → San Juan
Timetable, New York time
15:39DL 245 from Catania at the gate
12:00B6 1603 to San Juan leaves the gate
20 h 21 apart on the timetable, overnight
B6 1603 leaves 20 h 21 after DL 245 arrives on the timetable: more than half a day, so not a connection we count.