F9 4707 then DL 2597 at Atlanta
Washington → Atlanta → Montréal
Timetable, Atlanta time
10:12F9 4707 from Washington at the gate
09:00DL 2597 to Montréal leaves the gate
22 h 48 apart on the timetable, overnight
DL 2597 leaves 22 h 48 after F9 4707 arrives on the timetable: more than half a day, so not a connection we count.