5X 5602 then GB 397 at O'Hare
Louisville → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
18:075X 5602 from Louisville at the gate
07:00GB 397 to Cincinnati Northern Kentucky leaves the gate
12 h 53 apart on the timetable, overnight
GB 397 leaves 12 h 53 after 5X 5602 arrives on the timetable: more than half a day, so not a connection we count.