F9 4076 then DL 5227 at Atlanta
Houston → Atlanta → Roanoke
Timetable, Atlanta time
15:44F9 4076 from Houston at the gate
13:23DL 5227 to Roanoke leaves the gate
21 h 39 apart on the timetable, overnight
DL 5227 leaves 21 h 39 after F9 4076 arrives on the timetable: more than half a day, so not a connection we count.