AA 4802 then ET 3511 at O'Hare
Harrisburg → Chicago → Muscat
Timetable, Chicago time
16:35AA 4802 from Harrisburg at the gate
09:05ET 3511 to Muscat leaves the gate
16 h 30 apart on the timetable, overnight
ET 3511 leaves 16 h 30 after AA 4802 arrives on the timetable: more than half a day, so not a connection we count.