AA 4755 then ET 3511 at O'Hare
Minneapolis → Chicago → Muscat
Timetable, Chicago time
20:25AA 4755 from Minneapolis at the gate
09:05ET 3511 to Muscat leaves the gate
12 h 40 apart on the timetable, overnight
ET 3511 leaves 12 h 40 after AA 4755 arrives on the timetable: more than half a day, so not a connection we count.