UA 1246 then AA 2210 at Charlotte
Denver → Charlotte → Omaha
Timetable, Charlotte time
21:29UA 1246 from Denver at the gate
20:15AA 2210 to Omaha leaves the gate
22 h 46 apart on the timetable, overnight
AA 2210 leaves 22 h 46 after UA 1246 arrives on the timetable: more than half a day, so not a connection we count.