Fabric mod that adds hunger-based flight for survival. Can be used as client only mod for creative flight tweaks.

Flight is available in singleplayer only. But you can put this mod on your server.

Hunger cost per tick while flying + per 1m flown horizontally + per 1m flown upwards
Warning message when food level drops to certain level
No longer immune to fall damage
Can't fly inside water/lava
Can't fly inside blocks that slow movement: cobwebs, sweet berry bushes and powder snow

Modified flying movement. 3D flight if looking above/below certain degree. Makes landing on thin ledges easier
Inertia compensation for side movement while flying forward. Lets you make sharp turns
Extra keyboard shortcuts. Pressing Space key while falling will enable flight, pressing Shift+Space will disable flight

Movement modification has three modes:

vanilla - disabled
vanilla vertical - cap vertical speed at vanilla values
full speed - fly at full speed in any direction! (may be considered as unfair advantage by some servers)

Client tweaks are available in multiplayer too but disabled by default. Settings are stored per-server.

Flight Mod [Fabric]