AA 4571 then ET 3511 at O'Hare
Grand Rapids → Chicago → Muscat
Timetable, Chicago time
14:48AA 4571 from Grand Rapids at the gate
09:05ET 3511 to Muscat leaves the gate
18 h 17 apart on the timetable, overnight
ET 3511 leaves 18 h 17 after AA 4571 arrives on the timetable: more than half a day, so not a connection we count.