AA 2891 then ET 3511 at O'Hare
Los Angeles → Chicago → Muscat
Timetable, Chicago time
18:50AA 2891 from Los Angeles at the gate
09:05ET 3511 to Muscat leaves the gate
14 h 15 apart on the timetable, overnight
ET 3511 leaves 14 h 15 after AA 2891 arrives on the timetable: more than half a day, so not a connection we count.