UA 959 then GB 397 at O'Hare
London → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
13:45UA 959 from London at the gate
07:00GB 397 to Cincinnati Northern Kentucky leaves the gate
17 h 15 apart on the timetable, overnight
GB 397 leaves 17 h 15 after UA 959 arrives on the timetable: more than half a day, so not a connection we count.