AA 6311 then ET 3511 at O'Hare
Columbus (Ohio) → Chicago → Muscat
Timetable, Chicago time
11:00AA 6311 from Columbus (Ohio) at the gate
09:05ET 3511 to Muscat leaves the gate
22 h 05 apart on the timetable, overnight
ET 3511 leaves 22 h 05 after AA 6311 arrives on the timetable: more than half a day, so not a connection we count.