AA 2486 then UA 1925 at Charlotte
St Louis → Charlotte → Denver
Timetable, Charlotte time
16:49AA 2486 from St Louis at the gate
16:20UA 1925 to Denver leaves the gate
23 h 31 apart on the timetable, overnight
UA 1925 leaves 23 h 31 after AA 2486 arrives on the timetable: more than half a day, so not a connection we count.