AA 3515 then AA 537 at O'Hare
Appleton → Chicago → Hartford
Timetable, Chicago time
08:40AA 3515 from Appleton at the gate
08:10AA 537 to Hartford leaves the gate
23 h 30 apart on the timetable, overnight
AA 537 leaves 23 h 30 after AA 3515 arrives on the timetable: more than half a day, so not a connection we count.