Your physician and hospital are very busy. Many physicians perform more than 200 cases per year. The more they are famous, the more they are busy. So, you should make appointment with him about 2 -3 months ahead of time. Specially, when it coincide with the peak season of traveling time for regular tourists and students travel between semester, you should allow more time in booking the seat on the airlines. You should consult the airlines or booking agent.
MAKE SURE YOU ALLOW MORE TIME FOR YOU TO RECUPERATION FROM YOUR TEATMENT. DO NOT RUSH YOURSELF ON GOING BACK HOME. EXTENDED THE DATE OF TRAVEL YOU MIGHT HAVE TO PAY ADDITIONAL CHARGE TO THE AIRLINE.
Some airlines will let their doctor check on your medical record to make sure that you are in a good condition, before they will allow you to fly back home.