AA 640 then AA 5054 at Charlotte
Denver → Charlotte → Burlington
Timetable, Charlotte time
19:36AA 640 from Denver at the gate
19:25AA 5054 to Burlington leaves the gate
23 h 49 apart on the timetable, overnight
AA 5054 leaves 23 h 49 after AA 640 arrives on the timetable: more than half a day, so not a connection we count.