同路的英文：
go the same way

Go someone's way; walk the same way as someone
与某人同路

I'm going your way so I can give you a lift.
我和你同路,可以顺便开车送你.

Wow! I luck out! We are going back the same way.
哇!我幸运透了!我们可以同路回去

"being a distant cousin of Jia Lian's and Daiyu's former tutor, he was travelling with them."
"与贾琏是同宗弟兄,又与黛玉有师从之谊,故同路作伴而来."