Is Flying Safe For Person With Generalized Myasthenia Gravis?

I have generalized Myasthenia Gravis and have had two respiratory crises in the past four months. At the end of April I am supposed to fly from Denver to Boston for my daughter's wedding. I am concerned about flying and whether it will be safe for me to go. I am currently stable and do monthly IVIG treatments. Is this something I should be concerned about?