AA 1615 then ET 3511 at O'Hare
Orlando → Chicago → Muscat
Timetable, Chicago time
18:00AA 1615 from Orlando at the gate
09:05ET 3511 to Muscat leaves the gate
15 h 05 apart on the timetable, overnight
ET 3511 leaves 15 h 05 after AA 1615 arrives on the timetable: more than half a day, so not a connection we count.