How do some logia users fly?

Question

How do logia users fly with their ability/element? I thought they are only able to turn into their element, not control them.

Answer 1

Logia users, whose element is lighter than air, can fly by transforming (at least) their lower body into that element: Moku Moku no Mi (Smoke fruit) Gasu Gasu no Mi (Gas fruit)

I am unsure if the Pika Pika no Mi (Light fruit) is based on the same or rather the special property of light.

I am not aware of other Logia users truly flying with their ability. They rather propel themselves into the air (e.g. Mera Mera no Mi / Fire fruit and Suna Suna no Mi / Sand fruit).

The Yuki Yuki no Mi (Snow fruit) can grant flight by creating wings made of snow but that is less of a Logia thing itself.