It doesnt have to do with if its a flyer or not, the book states that any flyer may break from CC. The exact quote is:
If a Flyer wishes to Break Away from Close Combat, it
does not need to roll anything, even if an enemy model wishes
to prevent it. The Flyer needs only to expend one Action to Break
Away and can then Move freely.
the important part is, "even if an enemy model wishes to prevent it"
My question is, what is, and is not, a flyer? Strike skimmer, and dragon bike, no. rams air cav, yes. wailing banshee and jaeger commando? open for interpretation... i say yes, but thats my opinion.