UA 6072 then AA 1623 at Denver
Kearney → Denver → Charlotte
Timetable, Denver time
06:46UA 6072 from Kearney at the gate
06:20AA 1623 to Charlotte leaves the gate
23 h 34 apart on the timetable, overnight
AA 1623 leaves 23 h 34 after UA 6072 arrives on the timetable: more than half a day, so not a connection we count.