UA 5191 then AC 3994 at San Francisco
San Jose (California) → San Francisco → Boise
Timetable, San Francisco time
10:30UA 5191 from San Jose (California) at the gate
18:30AC 3994 to Boise leaves the gatealso UA 5644, NZ 9398
8 h apart on the timetable
The last days
UA 5191 and AC 3994 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.