AA 4927 then UA 4550 at O'Hare
Burlington (BTV) → Chicago → Columbia Regional
Timetable, Chicago time
20:35AA 4927 from Burlington (BTV) at the gate
19:45UA 4550 to Columbia Regional leaves the gate
23 h 10 apart on the timetable, overnight
UA 4550 leaves 23 h 10 after AA 4927 arrives on the timetable: more than half a day, so not a connection we count.