UA 664 then GB 397 at O'Hare
Las Vegas → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
12:29UA 664 from Las Vegas at the gate
07:00GB 397 to Cincinnati Northern Kentucky leaves the gate
18 h 31 apart on the timetable, overnight
GB 397 leaves 18 h 31 after UA 664 arrives on the timetable: more than half a day, so not a connection we count.