AA 1948 then UA 8112 at San Francisco
Chicago O'Hare → San Francisco → Portland (Oregon)
Timetable, San Francisco time
13:28AA 1948 from Chicago O'Hare at the gate
17:30UA 8112 to Portland (Oregon) leaves the gate
4 h 02 apart on the timetable
The last days
AA 1948 and UA 8112 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.