UA 214 then WN 1790 at San Francisco
St Louis → San Francisco → Las Vegas
Timetable, San Francisco time
21:41UA 214 from St Louis at the gatealso OZ 6344, NZ 9701
15:15WN 1790 to Las Vegas leaves the gate
17 h 34 apart on the timetable, overnight
WN 1790 leaves 17 h 34 after UA 214 arrives on the timetable: more than half a day, so not a connection we count.