UA 6104 then AA 537 at O'Hare
YIP → Chicago → Hartford
Timetable, Chicago time
20:00UA 6104 from YIP at the gate
08:20AA 537 to Hartford leaves the gate
12 h 20 apart on the timetable, overnight
AA 537 leaves 12 h 20 after UA 6104 arrives on the timetable: more than half a day, so not a connection we count.