AV 2270 then WN 1521 at San Francisco
Eugene → San Francisco → Las Vegas
Timetable, San Francisco time
15:35AV 2270 from Eugene at the gate
10:30WN 1521 to Las Vegas leaves the gate
18 h 55 apart on the timetable, overnight
WN 1521 leaves 18 h 55 after AV 2270 arrives on the timetable: more than half a day, so not a connection we count.