AA 5564 then UA 1925 at Charlotte
Harrisburg → Charlotte → Denver
Timetable, Charlotte time
18:46AA 5564 from Harrisburg at the gate
16:20UA 1925 to Denver leaves the gate
21 h 34 apart on the timetable, overnight
UA 1925 leaves 21 h 34 after AA 5564 arrives on the timetable: more than half a day, so not a connection we count.