A cheat called Simply Hax will allow you to fly to Minecraft version 1.11.2. If you always dreamed of flying in a mode of survival, and not only in creativity, then this cheat is exactly what you were looking for!
Unfortunately, cheat is not able to work on servers. Although, some players said that some servers are able to skip this cheat through their protection. In any case, this is the best cheat on the flight for Minecraft 1.11.12