AA 3428 then ET 3511 at O'Hare
Pensacola → Chicago → Muscat
Timetable, Chicago time
14:44AA 3428 from Pensacola at the gate
09:05ET 3511 to Muscat leaves the gate
18 h 21 apart on the timetable, overnight
ET 3511 leaves 18 h 21 after AA 3428 arrives on the timetable: more than half a day, so not a connection we count.