UA 4528 then GB 397 at O'Hare
St Louis → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
14:39UA 4528 from St Louis at the gate
07:00GB 397 to Cincinnati Northern Kentucky leaves the gate
16 h 21 apart on the timetable, overnight
GB 397 leaves 16 h 21 after UA 4528 arrives on the timetable: more than half a day, so not a connection we count.