Fly

Fly enables airborne movement in survival mode without elytra, levitation, or any vanilla mechanic. It is the single most detected movement module on servers with anti-cheat, because vanilla Minecraft has no legitimate way for a player to remain airborne under their own power.

Category

Movement

Type

Airborne movement

Supported clients

Wurst, Meteor, LiquidBounce, Aristois, Future, Raven

Minecraft versions

All 1.21.x

Detection risk

Extremely high on protected servers

Last checked

2026-09-24

What it does

Fly overrides the player's vertical and horizontal movement constraints. Configurable options:

• Horizontal speed — movement speed while airborne.
• Vertical speed — ascent and descent rates.
• Mode — Vanilla, Glide, Jetpack, or client-specific modes.
• Anti-kick — server-specific handling to reduce obvious kicks.
• Glide — mimics elytra flight, slightly lower detection profile than free flight.

Client support

Server compatibility

• Hypixel — Restricted. Watchdog flags any airborne movement without elytra or levitation.
• 2b2t — Permitted. No anti-cheat active.
• CubeCraft — Restricted. Sentinel flags sustained airborne states.

Detection behavior

Fly is detectable at the fundamental level:

• Airborne state tracking. Server tracks whether the player is on the ground; sustained airborne without elytra is impossible in vanilla.
• Y-coordinate changes. Any upward movement without a jump, ladder, or elytra is flagged.
• Position deltas. Server compares client-reported position against expected physics.
• Fall damage absence. Landing after airborne without damage is a strong signal.

Glide mode reduces detection on servers that permit elytra. Free-flight modes are universally flagged on protected servers.

Known limitations

• Anti-cheat systems that track fall damage will detect Flight on landing.
• Some servers kick players who stay airborne above a Y threshold.
• Fly combined with Speed produces an extreme movement profile that is trivially detected.

Related modules

• Speed — faster ground movement.
• BHop — bunny-hop pattern.
• LongJump — extended jump distance.
• Step — auto-climb blocks.