AA 4915 then ET 3511 at O'Hare
Lexington → Chicago → Muscat
Timetable, Chicago time
19:59AA 4915 from Lexington 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 4915 arrives on the timetable: more than half a day, so not a connection we count.