DL 9964 then DL 1734 at Atlanta
Grand Rapids → Atlanta → Toronto
Timetable, Atlanta time
18:19DL 9964 from Grand Rapids at the gate
14:07DL 1734 to Toronto leaves the gate
19 h 48 apart on the timetable, overnight
DL 1734 leaves 19 h 48 after DL 9964 arrives on the timetable: more than half a day, so not a connection we count.