UA 1970 then WN 1997 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
13:30WN 1997 to Las Vegas leaves the gate
15 h 45 apart on the timetable, overnight
WN 1997 leaves 15 h 45 after UA 1970 arrives on the timetable: more than half a day, so not a connection we count.