DL 2247 then ET 3511 at O'Hare
Salt Lake City → Chicago → Muscat
Timetable, Chicago time
12:03DL 2247 from Salt Lake City at the gate
09:05ET 3511 to Muscat leaves the gate
21 h 02 apart on the timetable, overnight
ET 3511 leaves 21 h 02 after DL 2247 arrives on the timetable: more than half a day, so not a connection we count.