UA 6047 then AA 353 at O'Hare
Pittsburgh → Chicago → Tampa
Timetable, Chicago time
20:31UA 6047 from Pittsburgh at the gate
18:40AA 353 to Tampa leaves the gate
22 h 09 apart on the timetable, overnight
AA 353 leaves 22 h 09 after UA 6047 arrives on the timetable: more than half a day, so not a connection we count.