UA 411 then DL 4628 at Atlanta
Chicago O'Hare → Atlanta → Roanoke
Timetable, Atlanta time
09:53UA 411 from Chicago O'Hare at the gate
08:58DL 4628 to Roanoke leaves the gate
23 h 05 apart on the timetable, overnight
DL 4628 leaves 23 h 05 after UA 411 arrives on the timetable: more than half a day, so not a connection we count.