In my experience, they let you fly with one blade if it's loaded in the razor itself. They did, however, make me throw out my spares when they told me this. I'v

In my experience, they let you fly with one blade if it's loaded in the razor itself. They did, however, make me throw out my spares when they told me this. I've found that if I'm not checking a bag, the trip is usually short enough that I don't really need more than one blade.