AA 4997 then ET 3511 at O'Hare
South Bend → Chicago → Muscat
Timetable, Chicago time
14:47AA 4997 from South Bend at the gate
09:05ET 3511 to Muscat leaves the gate
18 h 18 apart on the timetable, overnight
ET 3511 leaves 18 h 18 after AA 4997 arrives on the timetable: more than half a day, so not a connection we count.