UA 6105 then UA 5813 at O'Hare
Lewisburg → Chicago → Lexington
Timetable, Chicago time
12:45UA 6105 from Lewisburg at the gate
07:40UA 5813 to Lexington leaves the gate
18 h 55 apart on the timetable, overnight
UA 5813 leaves 18 h 55 after UA 6105 arrives on the timetable: more than half a day, so not a connection we count.