B6 519 then DL 2597 at Atlanta
New York JFK → Atlanta → Montréal
Timetable, Atlanta time
09:16B6 519 from New York JFK at the gate
09:00DL 2597 to Montréal leaves the gate
23 h 44 apart on the timetable, overnight
DL 2597 leaves 23 h 44 after B6 519 arrives on the timetable: more than half a day, so not a connection we count.