AA 1610 then AA 3294 at Charlotte
Denver → Charlotte → Boston
Timetable, Charlotte time
15:34AA 1610 from Denver at the gate
15:19AA 3294 to Boston leaves the gate
23 h 45 apart on the timetable, overnight
AA 3294 leaves 23 h 45 after AA 1610 arrives on the timetable: more than half a day, so not a connection we count.