I checked the website before I posted and was confused because it seems to contridict itself. Their policy states :"A child restraint device (e.g. car seat) may be carried in checked baggage, over and above the regular allowance for an infant or child up to age 12." and on another page says "A child restraint device (car seats, booster seats*) counts toward your baggage allowance when transported as checked baggage, unless the approved device is required onboard for seating the infant or child in his or her own paid seat." I tried calling Air Canada to firgure out the answer, but hung up because I was on hold a long time. I thought I would try here to see if anyone had any experience. Thank you for your response.