AA 6248 then ET 3511 at O'Hare
Columbus (Ohio) → Chicago → Muscat
Timetable, Chicago time
20:21AA 6248 from Columbus (Ohio) at the gate
09:05ET 3511 to Muscat leaves the gate
12 h 44 apart on the timetable, overnight
ET 3511 leaves 12 h 44 after AA 6248 arrives on the timetable: more than half a day, so not a connection we count.