AA 3515 then UA 3881 at O'Hare
Appleton → Chicago → INT
Timetable, Chicago time
07:12AA 3515 from Appleton at the gate
19:30UA 3881 to INT leaves the gate
12 h 18 apart on the timetable
UA 3881 leaves 12 h 18 after AA 3515 arrives on the timetable: more than half a day, so not a connection we count.