UA 8167 then AC 4507 at San Francisco
Newark → San Francisco → Reno
Timetable, San Francisco time
15:29UA 8167 from Newark at the gate
20:45AC 4507 to Reno leaves the gate
5 h 16 apart on the timetable
The last days
UA 8167 and AC 4507 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.