DL 346 then DL 2174 at Atlanta
Denver → Atlanta → Charleston (South Carolina)
Timetable, Atlanta time
15:20DL 346 from Denver at the gate
15:15DL 2174 to Charleston (South Carolina) leaves the gate
23 h 55 apart on the timetable, overnight
DL 2174 leaves 23 h 55 after DL 346 arrives on the timetable: more than half a day, so not a connection we count.