UA 457 then GB 397 at O'Hare
Los Angeles → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
18:56UA 457 from Los Angeles at the gate
07:00GB 397 to Cincinnati Northern Kentucky leaves the gate
12 h 04 apart on the timetable, overnight
GB 397 leaves 12 h 04 after UA 457 arrives on the timetable: more than half a day, so not a connection we count.