DL 939 then DL 798 at JFK
Los Angeles → New York → Phoenix
Timetable, New York time
20:59DL 939 from Los Angeles at the gate
17:30DL 798 to Phoenix leaves the gate
20 h 31 apart on the timetable, overnight
DL 798 leaves 20 h 31 after DL 939 arrives on the timetable: more than half a day, so not a connection we count.