DL 5315 then B6 1603 at JFK
Ithaca → New York → San Juan
Timetable, New York time
14:20DL 5315 from Ithaca at the gate
12:00B6 1603 to San Juan leaves the gate
21 h 40 apart on the timetable, overnight
B6 1603 leaves 21 h 40 after DL 5315 arrives on the timetable: more than half a day, so not a connection we count.