Now that recreational marijuana use is legal in eight states, more people are finding themselves wondering what the law says about traveling with cannabis. Complicating matters, the TSA has issued somewhat vague guidelines about what is permissible and what isn’t. And most of the confusion has to do with the status, not of dried flower, but of oils and extracts. Take CBD oil, for example, some types of which are legal everywhere. Can you bring CBD oil on planes? For the most part, yes. And here’s why you might want to.