"go by air is more convenient and safe" Jiuzhaigou Transportation Tip by neverstoptravel
Jiuzhaigou Transportation: 24 reviews and 22 photos
i have to correct that there is no train between jiuzhaigou and chengdu; only by bus or air.
however, you have to get ready for the delay if you take the plane; there are 2 routes to jiuzhaigou from chengdu, the usually one is chengdu-dujiangyan-yingxiu-wenchuan-maoxian-songpan-chuanzhusi-jiuzhaigou, another is via mianyan city- so called east route; the former with a lot of sightseeing but the latter is much safer.
you may take the bus at xinnanmen station from chengdu to jiuzhaigou daily or 3 buses available for jiuzhaigou at chadianzi bus station in the west of chengdu.
from jiuhuang airport to national park, you may either take the shuttle bus or taxi. there's no schedule for the shuttle which means usually you have to wait for full seated before departure. for taxi, it may cost you rmb 300.