AA 3681 then ET 3511 at O'Hare
Springfield Branson National → Chicago → Muscat
Timetable, Chicago time
12:23AA 3681 from Springfield Branson National at the gate
09:05ET 3511 to Muscat leaves the gate
20 h 42 apart on the timetable, overnight
ET 3511 leaves 20 h 42 after AA 3681 arrives on the timetable: more than half a day, so not a connection we count.