AA 2474 then ET 3511 at O'Hare
Phoenix → Chicago → Muscat
Timetable, Chicago time
14:33AA 2474 from Phoenix at the gate
09:05ET 3511 to Muscat leaves the gate
18 h 32 apart on the timetable, overnight
ET 3511 leaves 18 h 32 after AA 2474 arrives on the timetable: more than half a day, so not a connection we count.