CX 99 then K4 221 at O'Hare
New York JFK → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
17:00CX 99 from New York JFK at the gate
16:20K4 221 to Cincinnati Northern Kentucky leaves the gate
23 h 20 apart on the timetable, overnight
K4 221 leaves 23 h 20 after CX 99 arrives on the timetable: more than half a day, so not a connection we count.