UA 5437 then K4 221 at O'Hare
Duluth → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
20:13UA 5437 from Duluth at the gate
16:20K4 221 to Cincinnati Northern Kentucky leaves the gate
20 h 07 apart on the timetable, overnight
K4 221 leaves 20 h 07 after UA 5437 arrives on the timetable: more than half a day, so not a connection we count.