WN 1801 then DL 2939 at Atlanta
Denver → Atlanta → Memphis
Timetable, Atlanta time
18:35WN 1801 from Denver at the gate
18:09DL 2939 to Memphis leaves the gate
23 h 34 apart on the timetable, overnight
DL 2939 leaves 23 h 34 after WN 1801 arrives on the timetable: more than half a day, so not a connection we count.