UA 563 then ET 3511 at O'Hare
Boston → Chicago → Muscat
Timetable, Chicago time
19:00UA 563 from Boston at the gate
09:05ET 3511 to Muscat leaves the gate
14 h 05 apart on the timetable, overnight
ET 3511 leaves 14 h 05 after UA 563 arrives on the timetable: more than half a day, so not a connection we count.