UA 4773 then AA 537 at O'Hare
Cincinnati Northern Kentucky → Chicago → Hartford
Timetable, Chicago time
09:30UA 4773 from Cincinnati Northern Kentucky at the gate
08:10AA 537 to Hartford leaves the gate
22 h 40 apart on the timetable, overnight
AA 537 leaves 22 h 40 after UA 4773 arrives on the timetable: more than half a day, so not a connection we count.