UA 3377 then AA 3292 at O'Hare
Pittsburgh → Chicago → St Louis
Timetable, Chicago time
08:30UA 3377 from Pittsburgh at the gate
22:39AA 3292 to St Louis leaves the gate
14 h 09 apart on the timetable
AA 3292 leaves 14 h 09 after UA 3377 arrives on the timetable: more than half a day, so not a connection we count.