AC 8569 then DL 2398 at Atlanta
Montréal → Atlanta → New York JFK
Timetable, Atlanta time
21:17AC 8569 from Montréal at the gate
15:16DL 2398 to New York JFK leaves the gate
17 h 59 apart on the timetable, overnight
DL 2398 leaves 17 h 59 after AC 8569 arrives on the timetable: more than half a day, so not a connection we count.