AA 764 then ET 3511 at O'Hare
Houston → Chicago → Muscat
Timetable, Chicago time
12:00AA 764 from Houston at the gate
09:05ET 3511 to Muscat leaves the gate
21 h 05 apart on the timetable, overnight
ET 3511 leaves 21 h 05 after AA 764 arrives on the timetable: more than half a day, so not a connection we count.