I wouldn't allow her to take it onto the plane. I highly doubt that security would allow any animal on the plane. It may even be illegal. And sneaking the snake onto the plane could potentially be a nightmare, for your friend and our whole community. The press would be all over it, and it could potentially cause people in the airport to freak out.

I would highly recommend not sending the snake on the plane. For the sake of your friend, the snake, and our whole community.