UA 2207 then AA 529 at O'Hare
Philadelphia → Chicago → Knoxville
Timetable, Chicago time
12:29UA 2207 from Philadelphia at the gate
10:36AA 529 to Knoxville leaves the gate
22 h 07 apart on the timetable, overnight
AA 529 leaves 22 h 07 after UA 2207 arrives on the timetable: more than half a day, so not a connection we count.