Please do your homework on all 3 treatment options. There are 3 for hyperthyroidism, which are:
anti-thyroid medication
surgery to remove a portion or the whole thyroid gland
radioactive iodine ablation of the thyroid gland (also called RAI)
What is the CAUSE of your husbands hyperthyroidism? Have they tested him for the antibodies that cause Graves disease? Graves is the number one cause of hyperthyroidism, and TSI (thyroid stimulating immunoglobulins) are the antibodies that cause Graves. A simple blood test can check this out for him.
Personally, I feel that RAI for hyperthyroidism is barbaric, but that is just my opinion.
If your husband has the RAI ablation of the gland, then he will be emitting radioactivity for several days. I would think that he would be exposing the other people on the plane next to him.
I highly recommend the book "Thyroid for Dummies" by Dr. Alan Rubin. You can skip directly to the chapters on hyperthyroidism....it is an education on what is wrong with your husband and explains the treatment options too.
Radiation Iodine 
He was told he may have to fly to Vancouver to have it done as we dont have anyone here who does this. Will he be feeling all right to fly right home and go to work. (just got a new job) 
We are hoping his new boss will be understanding about this. I am really worried about him as he has not felt well for about six months and I know that if he looses this job it will devastate (sp) he has been off work for a year after he was let go because the company he was with was downsizing(after 31 years) I know the stress will not help him right now so any info anyone can give us would be really apprciated.
