DL 939 then B6 1965 at JFK
Los Angeles → New York → Georgetown (Guyana)
Timetable, New York time
20:59DL 939 from Los Angeles at the gate
17:54B6 1965 to Georgetown (Guyana) leaves the gate
20 h 55 apart on the timetable, overnight
B6 1965 leaves 20 h 55 after DL 939 arrives on the timetable: more than half a day, so not a connection we count.