DL 939 then DL 863 at JFK
Los Angeles → New York → Salt Lake City
Timetable, New York time
20:59DL 939 from Los Angeles at the gate
18:48DL 863 to Salt Lake City leaves the gate
21 h 49 apart on the timetable, overnight
DL 863 leaves 21 h 49 after DL 939 arrives on the timetable: more than half a day, so not a connection we count.