This has been a question which has bothered me for some time, as a subset of "various types of flight" in the Marvel comics. Among the X-Men specifically, it's a ubiquitous ability, mostly held by females. But each type of flight has a different logical basis...
- Storm holds herself aloft on winds
- Jean uses a type of telekinetic levitation
- ArchAngel has his natural wings
- Angel 2 has insectoid wings
- Banshee and his daughter Siren tend to propel themselves via the force of their sonic screams in a type of "controlled air foiling."
- While not "flight", Kitty Pride can maneuver through air by phasing her form and "walking" on air molecules.
- CannonBall produces a unidirectional "blast field" which essentially turns him into a human rocket
- Polaris uses a type of magnetic levitation to act on her own personal magnetic field.
- Her half-sister Scarlet Witch either negates gravity, or uses chaos energy to "push" herself against air.
But... how exactly does Rogue fly?
Yes, we know Rogue got that power, her durability and super strength permanently from Ms Marvel, who has Kree DNA, so that gives an origin .... but it still doesn't explain the basis or physical explanation of the power.
Even Rogue HERSELF isn't too clear on how that ability works! This was even lamp shaded somewhat nearly 30 years ago in Fox's X-Men: The Animated Series the first time she met Angel. You can see it here; go to the 3:00 mark:
So I was curious as to what canon explanation, if any, was given for her flight. I thought one might be available in an addition of the Marvel Universe Encyclopedia, but the 2 I found didn't offer much. Canonical information would be preferred, but theories or explanations from panels in the comics would also be helpful.