well i dont believe i ever flew in a non lucid dream. my non lucids are usually very close to real life in physics and location, like im never on some crazy adventure in the middle of some other planet with giant bunnies chasing me.

but in most of my LDs i fly pretty easily. although in the beginning i didnt know how and i jumped in the air only to find myself drifting slowly towards the ground. eventually i learned to focus my energy upwards or whatever direction i wished.