AA 328 then ET 3511 at O'Hare
Dallas-Fort Worth → Chicago → Muscat
Timetable, Chicago time
11:09AA 328 from Dallas-Fort Worth at the gate
09:05ET 3511 to Muscat leaves the gate
21 h 56 apart on the timetable, overnight
ET 3511 leaves 21 h 56 after AA 328 arrives on the timetable: more than half a day, so not a connection we count.