DL 1680 then DL 726 at Atlanta
Cincinnati → Atlanta → Boston
Timetable, Atlanta time
21:43DL 1680 from Cincinnati at the gate
13:50DL 726 to Boston leaves the gate
16 h 07 apart on the timetable, overnight
DL 726 leaves 16 h 07 after DL 1680 arrives on the timetable: more than half a day, so not a connection we count.