AA 9975 then F9 1101 at Philadelphia
Roanoke → Philadelphia → Atlanta
Timetable, Philadelphia time
15:24AA 9975 from Roanoke at the gate
12:36F9 1101 to Atlanta leaves the gate
21 h 12 apart on the timetable, overnight
F9 1101 leaves 21 h 12 after AA 9975 arrives on the timetable: more than half a day, so not a connection we count.