DL 640 then DL 5227 at Atlanta
San Francisco → Atlanta → Roanoke
Timetable, Atlanta time
15:33DL 640 from San Francisco at the gate
13:23DL 5227 to Roanoke leaves the gate
21 h 50 apart on the timetable, overnight
DL 5227 leaves 21 h 50 after DL 640 arrives on the timetable: more than half a day, so not a connection we count.