DL 706 then DL 1734 at Atlanta
Denver → Atlanta → Toronto
Timetable, Atlanta time
18:01DL 706 from Denver at the gate
14:07DL 1734 to Toronto leaves the gate
20 h 06 apart on the timetable, overnight
DL 1734 leaves 20 h 06 after DL 706 arrives on the timetable: more than half a day, so not a connection we count.