UA 6047 then AA 469 at O'Hare
Pittsburgh → Chicago → Boston
Timetable, Chicago time
20:31UA 6047 from Pittsburgh at the gate
17:52AA 469 to Boston leaves the gate
21 h 21 apart on the timetable, overnight
AA 469 leaves 21 h 21 after UA 6047 arrives on the timetable: more than half a day, so not a connection we count.