AA 1838 then ET 3511 at O'Hare
Dallas-Fort Worth → Chicago → Muscat
Timetable, Chicago time
18:30AA 1838 from Dallas-Fort Worth at the gate
09:05ET 3511 to Muscat leaves the gate
14 h 35 apart on the timetable, overnight
ET 3511 leaves 14 h 35 after AA 1838 arrives on the timetable: more than half a day, so not a connection we count.