UA 3941 then QF 3789 at San Francisco
Washington → San Francisco → Portland (Oregon)
Timetable, San Francisco time
14:07UA 3941 from Washington at the gate
18:59QF 3789 to Portland (Oregon) leaves the gate
4 h 52 apart on the timetable
The last days
UA 3941 and QF 3789 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.