The tickets that you receive are exactly the tickets you would get if you bought them at the gate. I did not see any expiry dates on the ticket. That said, I lucked into an Airmiles 'Sale' in October of 2005 where a 5 day base adult ticket was only 1650 airmiles (regular 2105). The sale was on between October 1-30. I only noticed the sale when I happened to proceed to shopping cart and the discount was taken at the register, so to speak. If you do wait until closer to your vacation, it may be worthwhile to have Airmiles send the tickets via Purolater or fed ex at your expense. this seems to expedite the process. ( anything that is under 1700 airmiles is sent out regular mail, or that is what I was told by airmiles rep.) HTH