AA 2910 then ET 3511 at O'Hare
Atlanta → Chicago → Muscat
Timetable, Chicago time
16:37AA 2910 from Atlanta at the gate
09:05ET 3511 to Muscat leaves the gate
16 h 28 apart on the timetable, overnight
ET 3511 leaves 16 h 28 after AA 2910 arrives on the timetable: more than half a day, so not a connection we count.