UA 3752 then DL 4631 at San Francisco
Denver → San Francisco → Santa Ana
Timetable, San Francisco time
13:00UA 3752 from Denver at the gate
15:05DL 4631 to Santa Ana leaves the gate
2 h 05 apart on the timetable
The last days
UA 3752 and DL 4631 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.