AA 3571 then ET 3511 at O'Hare
Springfield Branson National → Chicago → Muscat
Timetable, Chicago time
19:25AA 3571 from Springfield Branson National at the gate
09:05ET 3511 to Muscat leaves the gate
13 h 40 apart on the timetable, overnight
ET 3511 leaves 13 h 40 after AA 3571 arrives on the timetable: more than half a day, so not a connection we count.