DL 2597 then AC 8638 at Montréal
Atlanta → Montréal → New York LaGuardia
Timetable, Montréal time
13:36DL 2597 from Atlanta at the gate
13:05AC 8638 to New York LaGuardia leaves the gate
23 h 29 apart on the timetable, overnight
AC 8638 leaves 23 h 29 after DL 2597 arrives on the timetable: more than half a day, so not a connection we count.