AA 2891 then K4 221 at O'Hare
Los Angeles → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
18:50AA 2891 from Los Angeles at the gate
10:35K4 221 to Cincinnati Northern Kentucky leaves the gate
15 h 45 apart on the timetable, overnight
K4 221 leaves 15 h 45 after AA 2891 arrives on the timetable: more than half a day, so not a connection we count.