UA 3875 then WN 2386 at San Francisco
IAB → San Francisco → Las Vegas
Timetable, San Francisco time
01:46UA 3875 from IAB at the gate
17:30WN 2386 to Las Vegas leaves the gate
15 h 44 apart on the timetable
WN 2386 leaves 15 h 44 after UA 3875 arrives on the timetable: more than half a day, so not a connection we count.