WN 1801 then DL 1021 at Atlanta
Denver → Atlanta → Greenville-Spartanburg
Timetable, Atlanta time
18:35WN 1801 from Denver at the gate
17:12DL 1021 to Greenville-Spartanburg leaves the gate
22 h 37 apart on the timetable, overnight
DL 1021 leaves 22 h 37 after WN 1801 arrives on the timetable: more than half a day, so not a connection we count.