What time is the last bus from Wulingyuan to Zhangjiajie Hehua Airport?

There is no direct bus to the airport from the scenic area.
You can take a bus to ZJJ Central Bus Station (about 50 minutes). The last bus departs at 19:00, and the fare is CNY 12. Then, take a taxi to the airport directly.

Or, you can hire a pricate car to get to airport from Wulingyuan. The fare may be CNY 100-150. :)