UA 4388 then AA 5294 at O'Hare
Cedar Rapids → Chicago → Knoxville
Timetable, Chicago time
20:24UA 4388 from Cedar Rapids at the gate
19:59AA 5294 to Knoxville leaves the gate
23 h 35 apart on the timetable, overnight
AA 5294 leaves 23 h 35 after UA 4388 arrives on the timetable: more than half a day, so not a connection we count.