AA 3197 then ET 3511 at O'Hare
Omaha → Chicago → Muscat
Timetable, Chicago time
10:00AA 3197 from Omaha at the gate
09:05ET 3511 to Muscat leaves the gate
23 h 05 apart on the timetable, overnight
ET 3511 leaves 23 h 05 after AA 3197 arrives on the timetable: more than half a day, so not a connection we count.