UA 5100 then AA 529 at O'Hare
Fort Dodge → Chicago → Knoxville
Timetable, Chicago time
13:04UA 5100 from Fort Dodge at the gate
10:36AA 529 to Knoxville leaves the gate
21 h 32 apart on the timetable, overnight
AA 529 leaves 21 h 32 after UA 5100 arrives on the timetable: more than half a day, so not a connection we count.