UA 3922 then AC 4370 at San Francisco
Denver → San Francisco → Reno
Timetable, San Francisco time
20:45UA 3922 from Denver at the gate
20:40AC 4370 to Reno leaves the gate
23 h 55 apart on the timetable, overnight
AC 4370 leaves 23 h 55 after UA 3922 arrives on the timetable: more than half a day, so not a connection we count.