UA 5336 then AA 5294 at O'Hare
Memphis → Chicago → Knoxville
Timetable, Chicago time
20:17UA 5336 from Memphis at the gate
19:59AA 5294 to Knoxville leaves the gate
23 h 42 apart on the timetable, overnight
AA 5294 leaves 23 h 42 after UA 5336 arrives on the timetable: more than half a day, so not a connection we count.