UA 4584 then ET 3511 at O'Hare
Moline → Chicago → Muscat
Timetable, Chicago time
16:00UA 4584 from Moline at the gate
09:05ET 3511 to Muscat leaves the gate
17 h 05 apart on the timetable, overnight
ET 3511 leaves 17 h 05 after UA 4584 arrives on the timetable: more than half a day, so not a connection we count.