DL 973 then DL 2144 at Atlanta
Boston → Atlanta → Madison
Timetable, Atlanta time
21:59DL 973 from Boston at the gate
21:45DL 2144 to Madison leaves the gate
23 h 46 apart on the timetable, overnight
DL 2144 leaves 23 h 46 after DL 973 arrives on the timetable: more than half a day, so not a connection we count.