AA 3449 then ET 3511 at O'Hare
Fargo → Chicago → Muscat
Timetable, Chicago time
15:04AA 3449 from Fargo at the gate
09:05ET 3511 to Muscat leaves the gate
18 h 01 apart on the timetable, overnight
ET 3511 leaves 18 h 01 after AA 3449 arrives on the timetable: more than half a day, so not a connection we count.