AA 3310 then ET 3511 at O'Hare
Phoenix → Chicago → Muscat
Timetable, Chicago time
14:43AA 3310 from Phoenix at the gate
09:05ET 3511 to Muscat leaves the gate
18 h 22 apart on the timetable, overnight
ET 3511 leaves 18 h 22 after AA 3310 arrives on the timetable: more than half a day, so not a connection we count.