UA 1620 then 2I 199 at Miami
Chicago O'Hare → Miami → Cincinnati
Timetable, Miami time
15:03UA 1620 from Chicago O'Hare at the gate
11:002I 199 to Cincinnati leaves the gate
19 h 57 apart on the timetable, overnight
2I 199 leaves 19 h 57 after UA 1620 arrives on the timetable: more than half a day, so not a connection we count.