AA 880 then ET 3511 at O'Hare
Philadelphia → Chicago → Muscat
Timetable, Chicago time
12:19AA 880 from Philadelphia at the gate
09:05ET 3511 to Muscat leaves the gate
20 h 46 apart on the timetable, overnight
ET 3511 leaves 20 h 46 after AA 880 arrives on the timetable: more than half a day, so not a connection we count.