How can I reach Zhangjiajie from Chengdu and then to Guilin? Thank you

To ZJJ: you may take a direct flight which departs at 13:05 on Tuesday, Friday, and Sunday. The trip takes about 70 minutes. Also, you may fly to Changsha (about 2 hours), and then take a train or coach to your destination.
To Guilin: you may take a direct flight to Guilin (about 2 hours). The flights depart at 15:20 every day. :)