AA 6345 then UA 4645 at O'Hare
Lexington → Chicago → Fort Wayne
Timetable, Chicago time
11:59AA 6345 from Lexington at the gate
11:25UA 4645 to Fort Wayne leaves the gate
23 h 26 apart on the timetable, overnight
UA 4645 leaves 23 h 26 after AA 6345 arrives on the timetable: more than half a day, so not a connection we count.