UA 623 then K4 221 at O'Hare
New York LaGuardia → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
10:56UA 623 from New York LaGuardia at the gate
10:35K4 221 to Cincinnati Northern Kentucky leaves the gate
23 h 39 apart on the timetable, overnight
K4 221 leaves 23 h 39 after UA 623 arrives on the timetable: more than half a day, so not a connection we count.