I have a sort-of related tip, but more cold-related, particularly for those flying into Orlando.
A friend of mine worked at a hospital and said the reason so many people get sick when they fly (aside from the obvious--a plane is full of re-circulated germs), has to do with dryness. He said that the way that the germs invade the body is usually through the nasal cavities (i.e. nostrils) which become dry and actually form tiny cracks, allowing bacteria into the body. He suggested a nasal mist, which usually is just saline solution. I have also used a thick moisturizer which works well too. I decided to just carry a nasal mist with me on planes and a kleenex to provide a little privacy!!
Also, drinking water instead of colas and alcoholic beverages makes a difference too.