AA 4042 then ET 3511 at O'Hare
Omaha → Chicago → Muscat
Timetable, Chicago time
17:59AA 4042 from Omaha at the gate
09:05ET 3511 to Muscat leaves the gate
15 h 06 apart on the timetable, overnight
ET 3511 leaves 15 h 06 after AA 4042 arrives on the timetable: more than half a day, so not a connection we count.