AA 4915 then UA 6074 at O'Hare
Lexington → Chicago → Clarksburg
Timetable, Chicago time
19:59AA 4915 from Lexington at the gate
19:50UA 6074 to Clarksburg leaves the gate
23 h 51 apart on the timetable, overnight
UA 6074 leaves 23 h 51 after AA 4915 arrives on the timetable: more than half a day, so not a connection we count.