Wirelessly posted (Apple iPhone: Mozilla/5.0 (iPhone; CPU iPhone OS 5_1_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9B206 Safari/7534.48.3)
Just carefully fold the suit and pack into your rollaboard for the actual flights. If you wish, then unpack and carry separately through the airports.
I roll up my sport coat and stuff into my bag all the time when I land in a tropical/warm location, and the wrinkles are always gone within a few hours of hanging it up in the hotel closet.