DL 973 then DL 1366 at Atlanta
Boston → Atlanta → Chattanooga
Timetable, Atlanta time
21:59DL 973 from Boston at the gate
21:29DL 1366 to Chattanooga leaves the gate
23 h 30 apart on the timetable, overnight
DL 1366 leaves 23 h 30 after DL 973 arrives on the timetable: more than half a day, so not a connection we count.