UA 4581 then GB 397 at O'Hare
Knoxville → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
11:39UA 4581 from Knoxville at the gate
07:00GB 397 to Cincinnati Northern Kentucky leaves the gate
19 h 21 apart on the timetable, overnight
GB 397 leaves 19 h 21 after UA 4581 arrives on the timetable: more than half a day, so not a connection we count.