UA 1970 then UA 751 at San Francisco
Cleveland → San Francisco → Las Vegas
Timetable, San Francisco time
21:45UA 1970 from Cleveland at the gatealso VA 8489, NZ 9046, OZ 9526
16:50UA 751 to Las Vegas leaves the gatealso AC 4104, EK 6366, VA 8191, NZ 9226
19 h 05 apart on the timetable, overnight
UA 751 leaves 19 h 05 after UA 1970 arrives on the timetable: more than half a day, so not a connection we count.