AA 6332 then ET 3511 at O'Hare
St Louis → Chicago → Muscat
Timetable, Chicago time
14:56AA 6332 from St Louis at the gate
09:05ET 3511 to Muscat leaves the gate
18 h 09 apart on the timetable, overnight
ET 3511 leaves 18 h 09 after AA 6332 arrives on the timetable: more than half a day, so not a connection we count.