UA 307 then AA 9786 at O'Hare
Minneapolis → Chicago → Charlotte
Timetable, Chicago time
07:44UA 307 from Minneapolis at the gate
00:00AA 9786 to Charlotte leaves the gate
16 h 16 apart on the timetable, overnight
AA 9786 leaves 16 h 16 after UA 307 arrives on the timetable: more than half a day, so not a connection we count.