UA 4464 then AA 3484 at O'Hare
State College → Chicago → St Louis
Timetable, Chicago time
11:42UA 4464 from State College at the gate
09:30AA 3484 to St Louis leaves the gate
21 h 48 apart on the timetable, overnight
AA 3484 leaves 21 h 48 after UA 4464 arrives on the timetable: more than half a day, so not a connection we count.