UA 6047 then AA 5294 at O'Hare
Pittsburgh → Chicago → Knoxville
Timetable, Chicago time
20:31UA 6047 from Pittsburgh at the gate
19:59AA 5294 to Knoxville leaves the gate
23 h 28 apart on the timetable, overnight
AA 5294 leaves 23 h 28 after UA 6047 arrives on the timetable: more than half a day, so not a connection we count.