AA 3033 then ET 3511 at O'Hare
Atlanta → Chicago → Muscat
Timetable, Chicago time
20:50AA 3033 from Atlanta at the gate
09:05ET 3511 to Muscat leaves the gate
12 h 15 apart on the timetable, overnight
ET 3511 leaves 12 h 15 after AA 3033 arrives on the timetable: more than half a day, so not a connection we count.