AA 2880 then ET 3511 at O'Hare
Philadelphia → Chicago → Muscat
Timetable, Chicago time
17:37AA 2880 from Philadelphia at the gate
09:05ET 3511 to Muscat leaves the gate
15 h 28 apart on the timetable, overnight
ET 3511 leaves 15 h 28 after AA 2880 arrives on the timetable: more than half a day, so not a connection we count.