AA 3960 then UA 4772 at O'Hare
Valparaiso → Chicago → Columbia Regional
Timetable, Chicago time
14:34AA 3960 from Valparaiso at the gate
12:45UA 4772 to Columbia Regional leaves the gate
22 h 11 apart on the timetable, overnight
UA 4772 leaves 22 h 11 after AA 3960 arrives on the timetable: more than half a day, so not a connection we count.