AA 4648 then ET 3511 at O'Hare
Grand Rapids → Chicago → Muscat
Timetable, Chicago time
14:44AA 4648 from Grand Rapids at the gate
09:05ET 3511 to Muscat leaves the gate
18 h 21 apart on the timetable, overnight
ET 3511 leaves 18 h 21 after AA 4648 arrives on the timetable: more than half a day, so not a connection we count.