Hi travel gurus,
Sorry for cross posting, I feel like I did not form a good question after reading your replies. So I reform it here. Thanks for your help again!
I am traveling from Disneyland Anaheim to San Francisco City on Dec 24th. We have to return the car at 3 pm on that day, so I guess we will depart early on 8 am. Google Map told me that it will takes 6hrs 15mins for this trip. But since it is on CRAZY Dec 24th when everybody is rushing home, I want to double check the feasibility of getting back to San Francisco within 7 - 8 hours. We will not stop on the road EXCEPT FOR gas or a fast food stop!