ET 3608 then UA 658 at O'Hare
Anchorage → Chicago → Las Vegas
Timetable, Chicago time
07:16ET 3608 from Anchorage at the gate
20:19UA 658 to Las Vegas leaves the gate
13 h 03 apart on the timetable
UA 658 leaves 13 h 03 after ET 3608 arrives on the timetable: more than half a day, so not a connection we count.