从学校出发用英语怎么说

set off from school
或者 start from school
或者 leave from school

leave school to somplace.somplace指出发后要到的地方，比如从学校出发去邮局就说leave school to post office,还有很多说法，看你觉的哪个好了

from school to ....

get off from school

get off
v.
下来, 脱下, 出发, 被容忍, 动身, 开始

start form the school to XX

Start from the school