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 moving down for at least 4 seconds (80 ticks). Every time the player moves down by at least ~0.032m¹⁾, the four-second timer starts over again. With a bit of practice or use of the Anti-Kick feature, it is possible to fly around indefinitely without getting kicked.

This setting determines how fast the Flight hack moves the player horizontally when the W, A, S or D keys are pressed.

This setting determines how fast the Flight hack moves the player up and down when the jump or sneak key is pressed.

When this checkbox is checked, Flight will reduce the player's horizontal speed to 0.85 while the player is sneaking. This prevents the player from rubber-banding back and forth when flying forward and down at the same time.

When this checkbox is checked, Flight will make the player fall for a short time, at an interval determined by the “Anti-Kick Interval” setting and a distance determined by the “Anti-Kick Distance” setting. This prevents the player from getting kicked with the message “Flying is not enabled on this server”.

This setting determines how often Flight will make the player fall. The default value of 30 ticks means that the player will fall every 1.5 seconds, which is rather conservative since most servers will wait as much as 80 ticks (4 seconds) before kicking the player.

As long as the server is not lagging too badly, values as high as 70 ticks (3.5 seconds) are still safe to use and will be much less noticeable to the user.

This setting determines how far Flight will make the player fall when the “Anti-Kick” setting is enabled. The default value of 0.07m (7cm) is again rather conservative, since most servers will only require a fall distance of 0.032m (3.2cm) to prevent the player from getting kicked.

Decreasing this value to about 0.034m (3.4cm) will make the Anti-Kick feature less noticeable to the user and still be safe to use on most servers. However, some users may prefer the noticeable jump caused by the default value, as it provides a visual indication that the Anti-Kick feature is working correctly.