AA 470 then ET 3511 at O'Hare
Philadelphia → Chicago → Muscat
Timetable, Chicago time
17:33AA 470 from Philadelphia at the gate
09:05ET 3511 to Muscat leaves the gate
15 h 32 apart on the timetable, overnight
ET 3511 leaves 15 h 32 after AA 470 arrives on the timetable: more than half a day, so not a connection we count.