UA 1589 then UA 3750 at Houston
San José (Costa Rica) → Houston → San Francisco
Timetable, Houston time
16:30UA 1589 from San José (Costa Rica) at the gate
21:30UA 3750 to San Francisco leaves the gate
5 h apart on the timetable
The last days
UA 1589 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 160921:455 h 15 after UA 1589 on the timetable