Flight
Type	Hack
Category	Movement
In-game description	“Allows you to fly. WARNING: You will take fall damage if you don't use NoFall.”
Default keybind	G
Source code	net/wurstclient/hacks/FlightHack.java

The Flight hack allows the user to fly around and reach places they normally couldn't. As the in-game description says, Flight should be used together with NoFall to avoid taking fall damage.

Servers where flying is not enabled will attempt to kick the user for using Flight, but they can only detect that Flight is being used if the player isn't touching any blocks for at least 4 seconds (80 ticks). Every time the player touches a block, the four-second timer starts over again. With a bit of practice, this can be exploited by periodically touching the ground or flying into a wall.