UA 3884 then AA 3901 at O'Hare
Melbourne (Florida) → Chicago → Appleton
Timetable, Chicago time
01:06UA 3884 from Melbourne (Florida) at the gate
23:00AA 3901 to Appleton leaves the gate
21 h 54 apart on the timetable
AA 3901 leaves 21 h 54 after UA 3884 arrives on the timetable: more than half a day, so not a connection we count.