AA 706 then ET 3511 at O'Hare
Washington National → Chicago → Muscat
Timetable, Chicago time
16:18AA 706 from Washington National at the gate
09:05ET 3511 to Muscat leaves the gate
16 h 47 apart on the timetable, overnight
ET 3511 leaves 16 h 47 after AA 706 arrives on the timetable: more than half a day, so not a connection we count.