三藩市到洛杉磯開車的話有多少公里

1. 608 km airport to airport (SFO-LAX).

(The U.S. unit of distance is miles. So the actual distance is 378 mi).

2. It varies due to following issues:

a. Your route determines how fast or slow you can go (There are 4 major north-south highways connecting San Francisco and Los Angeles).

With the highway with the highest speed limit (Interstate 5), even the legal limit is 70mi/h (113km/h), the average speed is 85-90 mi/h (137-145 km/h).

With the highway with the lowest speed limit (CA State Route 1), even the legal limit is 50mi/h (80km/h), the average speed is 35-40 mi/h (56-64 km/h) due to its scenic route.

b. A fuel stop is mandatory.

c. Your car's performance affects your speed.

d. In-city (San Francisco/Los Angeles) traffic

The trip can be ranged from 4.5 hours to 12 hours.

Jenkin's answer is better.

假如自駕行Interstate高速公路 I-5 大約620KM (六小時)...全程可以"高速"100KM/HR"-加埋中途停車食一餐的話最快七小時可達。
亦可選擇沿太平洋海岸的US Route 101 大約674KM (時間可能要多1至2小時-因為會經過小鎮或觀景點地區車速限制會比高速公路的慢，所以可能要八小時左右 - 未計你如果停車欣賞風景的時間...可以用上十至十二小時的)

可參考這裏資料(By car)
http://los-angeles-san-francisco.com/English/