Hi. I try to book flight: Zhangjiajie to Xi'an on 23.3.13 - Is it too soon, or there are no flights?

Hi, I think it may be a little soon. But if you want, you can book the ticket in the website:
https://www.travelchinaguide.com/china-flights/
If you cannot search the flight that day, you can swnd an email to bookingtravelchinaguide. com
The opeators may help you a lot.
I used the website a couple weeks ago, really helped me.