Y4 2770 then UA 581 at San Francisco
Las Vegas → San Francisco → Cleveland
Timetable, San Francisco time
14:20Y4 2770 from Las Vegas at the gatealso F9 4401
12:45UA 581 to Cleveland leaves the gate
22 h 25 apart on the timetable, overnight
UA 581 leaves 22 h 25 after Y4 2770 arrives on the timetable: more than half a day, so not a connection we count.