AA 2556 then ET 3511 at O'Hare
San Diego → Chicago → Muscat
Timetable, Chicago time
19:59AA 2556 from San Diego at the gate
09:05ET 3511 to Muscat leaves the gate
13 h 06 apart on the timetable, overnight
ET 3511 leaves 13 h 06 after AA 2556 arrives on the timetable: more than half a day, so not a connection we count.