AA 2998 then ET 3511 at O'Hare
Los Angeles → Chicago → Muscat
Timetable, Chicago time
15:59AA 2998 from Los Angeles at the gate
09:05ET 3511 to Muscat leaves the gate
17 h 06 apart on the timetable, overnight
ET 3511 leaves 17 h 06 after AA 2998 arrives on the timetable: more than half a day, so not a connection we count.