If you are an Air Miles collector, you will have received notice to use up the old ones before the end of this year. Unused Air Miles collected before December 31, 2011 will expire. Now a Red Deer man who has been saving for a dream South Seas vacation wants to launch a class action law suit. After this, the expiry date on Air Miles, they say, will be five years. I came across this stat on Friday. According to Yahoo, 92% of frequent flyer miles go unused every year. Do you use the ones you collect, and do you use them for something other than travel?