I'm pretty sure that this is a missable achievement, as if you collect all the soul clusters, there won't be enough for you to get without touching the ground. But fear not, this is an achievement you can get within the first 10 minutes of the game. There are literally hundreds of different ways to obtain this. But my best suggestion is to fly often and whenever you are flying, make it your main goal to collect five or more of these. If you are having trouble, wait till later on until your flight is more upgraded so you can fly longer.
There are over 900 of these in the game, by the way.