I've actually visualized doing this before but have never done it.
If one of your feet is planted while you lift the other off the ground, and then dribble, that's legal. It's the same as planting one foot and moving the other foot around, and then dribbling.
But if you jump with both feet in the air and then dribble, I'm not sure. I want to say that's legal, but I've never seen someone do that, so it could be illegal (traveling).