DL 939 then DL 5023 at JFK
Los Angeles → New York → Cincinnati
Timetable, New York time
20:59DL 939 from Los Angeles at the gate
18:20DL 5023 to Cincinnati leaves the gate
21 h 21 apart on the timetable, overnight
DL 5023 leaves 21 h 21 after DL 939 arrives on the timetable: more than half a day, so not a connection we count.