AA 1260 then ET 3511 at O'Hare
Boston → Chicago → Muscat
Timetable, Chicago time
18:55AA 1260 from Boston at the gate
09:05ET 3511 to Muscat leaves the gate
14 h 10 apart on the timetable, overnight
ET 3511 leaves 14 h 10 after AA 1260 arrives on the timetable: more than half a day, so not a connection we count.