AA 4038 then ET 3511 at O'Hare
Madison → Chicago → Muscat
Timetable, Chicago time
16:44AA 4038 from Madison at the gate
09:05ET 3511 to Muscat leaves the gate
16 h 21 apart on the timetable, overnight
ET 3511 leaves 16 h 21 after AA 4038 arrives on the timetable: more than half a day, so not a connection we count.