DL 706 then DL 2170 at Atlanta
Denver → Atlanta → Valparaiso
Timetable, Atlanta time
21:24DL 706 from Denver at the gate
15:49DL 2170 to Valparaiso leaves the gate
18 h 25 apart on the timetable, overnight
DL 2170 leaves 18 h 25 after DL 706 arrives on the timetable: more than half a day, so not a connection we count.