AA 6291 then ET 3511 at O'Hare
Oklahoma City → Chicago → Muscat
Timetable, Chicago time
15:30AA 6291 from Oklahoma City at the gate
09:05ET 3511 to Muscat leaves the gate
17 h 35 apart on the timetable, overnight
ET 3511 leaves 17 h 35 after AA 6291 arrives on the timetable: more than half a day, so not a connection we count.