AA 4697 then DL 2597 at Atlanta
Washington National → Atlanta → Montréal
Timetable, Atlanta time
10:17AA 4697 from Washington National at the gate
09:00DL 2597 to Montréal leaves the gate
22 h 43 apart on the timetable, overnight
DL 2597 leaves 22 h 43 after AA 4697 arrives on the timetable: more than half a day, so not a connection we count.