Buses from Mianyang to Jiuzhaigou

You can take long-distance bus at Pingzheng Bus Station, and get off at JZG County Bus Station.
The bus schedules are from 06:30 to 12:00. The ticket fare is CNY 88 per person. After arriving, hire a private car to get to the scenic area directly. It costs CNY 100 to 150.

BTW, most visitors make transfer at Chengdu, as it has more bus and flight schedules and the city itself is a hot travel destination.