In "Minecraft's" Creative or Spectator modes, you can fly by double-tapping the jump button, but in Survival mode, you'll need to find an Elytra.

A Minecraft player builds an incredible Elytra racecourse that goes across land, sea, and sky to test their maneuverability while flying.

This Minecraft mod insists that you're flying wrong in the sandbox game, and makes things a little bit more realistic thanks to physics ...