Hi, I am planning to go to Jiuzhaigou on 21 Oct. Is there any night bus from Xian to Jiuzhaigou?

I am sorry that there is no direct bus between the two due to the long distance. You are advised to take a direct flight to Huanglong Airport (about 1.5 hours). Upon arrival, take a shuttle bus to JZG for CNY 45 (about 1.5 hours).

Yes, you can book the flight ticket through bookingtravelchinaguide.com. Good luck! :)