UA 424 then K4 221 at O'Hare
Boise → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
17:05UA 424 from Boise at the gate
16:20K4 221 to Cincinnati Northern Kentucky leaves the gate
23 h 15 apart on the timetable, overnight
K4 221 leaves 23 h 15 after UA 424 arrives on the timetable: more than half a day, so not a connection we count.