UA 799 then ET 3511 at O'Hare
Grand Cayman → Chicago → Muscat
Timetable, Chicago time
18:13UA 799 from Grand Cayman at the gate
09:05ET 3511 to Muscat leaves the gate
14 h 52 apart on the timetable, overnight
ET 3511 leaves 14 h 52 after UA 799 arrives on the timetable: more than half a day, so not a connection we count.