AA 4413 then ET 3511 at O'Hare
Memphis → Chicago → Muscat
Timetable, Chicago time
19:50AA 4413 from Memphis at the gate
09:05ET 3511 to Muscat leaves the gate
13 h 15 apart on the timetable, overnight
ET 3511 leaves 13 h 15 after AA 4413 arrives on the timetable: more than half a day, so not a connection we count.