Frequent flyer miles also known as airline miles or travel points, are part of a loyalty program offered by airlines and/or credit cards. Typically, you accumulate a set number of miles based on how much you spend on a ticket (or how much you spend on your credit card). That is simple enough on the surface, but the term “miles” does not equate to the actual number of miles you have already flown or can fly in the future. Basically, airline miles are like any other rewards program: you get points for buying stuff, and eventually those points accumulate, and you get something for free (i.e. flights, accommodation, train tickets, and other forms of travel).