UA 973 then GB 397 at O'Hare
Brussels → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
12:10UA 973 from Brussels at the gate
07:00GB 397 to Cincinnati Northern Kentucky leaves the gate
18 h 50 apart on the timetable, overnight
GB 397 leaves 18 h 50 after UA 973 arrives on the timetable: more than half a day, so not a connection we count.