I kinda suspected you had no answer and would result to the liberal tactic of misdirection. Your question was specific. I do not support the idea of barring Muslims from planes and I do not support interrment. But the answer to your question (and YOU asked it, remember?) can be found in the answer to mine. The same authority used to interr Japanese-Americans in WWII would be the precedent for barring Muslims from planes. I don't know what the authority was, but whatever source it came from is probably still in effect or could be revived using the same procedures. Was it Presidental decree? Congressional declaration? Public law? Find whatever it was and there will be the answer to your question.
Did you know that it only affected those Japanese living on the west coast?
Did you know that any Japanese citizen in a camp could move to the midwest of east coast if they were sponsored?
Did you know that the property of the Japanese placed in the camps was turned over to a government agency to run and that most of those properties, which had been highly successful prior to the war, suddenly failed and were auctioned off to pay property taxes?
There is a lot you don't know about the internment.