If you are airsick, that does not mean that air made you sick.
Hmm. Now that I mentioned it, I wonder if anyone is allergic to air. If so, how do they exist?
I suppose that if there are high concentrations of gaseous toxins in the air immediately around you that particular air would make you sick without it being a chronic health condition. However, it’s still a situation that you might want to avoid. Just a suggestion.
If you are airsick you suffer from motion sickness as a result of flying. That is to say, motion sickness as a result of flying in an airplane. If you were flying without the aid of a flying machine your superpowers would probably protect you from motion sickness.