AA 4927 then UA 3750 at Houston
Phoenix → Houston → San Francisco
Timetable, Houston time
17:43AA 4927 from Phoenix at the gate
21:30UA 3750 to San Francisco leaves the gate
3 h 47 apart on the timetable
The last days
AA 4927 and UA 3750 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.
Later flights to San Francisco
UA 160921:454 h 02 after AA 4927 on the timetable