UA 3911 then LY 4489 at San Francisco
Portland (Oregon) → San Francisco → Los Angeles
Timetable, San Francisco time
13:56UA 3911 from Portland (Oregon) at the gate
18:28LY 4489 to Los Angeles leaves the gate
4 h 32 apart on the timetable
The last days
UA 3911 and LY 4489 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.