AA 894 then ET 3511 at O'Hare
Boston → Chicago → Muscat
Timetable, Chicago time
14:40AA 894 from Boston at the gate
09:05ET 3511 to Muscat leaves the gate
18 h 25 apart on the timetable, overnight
ET 3511 leaves 18 h 25 after AA 894 arrives on the timetable: more than half a day, so not a connection we count.