My father's remains were transported by air between countries but merely as ashes, so quite simple, really. Much of the advice given so far is no doubt helpful, but your deafness will bring additional complications. It is likely to be much easier for someone at the point of origin (in this case Canada) to make both enquiries and arrangements - if at all possible, make use of a relative or other over there. Making arrangements from the destination end is not impossible, but may be easier by getting the advice of the nearest British Embassy or Consulate, rather than asking in the UK. A UK firm is likely to cost more due to the international element in making the arrangements, not necessarily, but likely. Similarly, it may be best to speak to the airline's (nearest) local office because they are the people who will deal with the matter at that end - making contact with some specific individual whom you can make the regular advisor/interlocutor is worth trying. Once the process is set up, things should go without a hitch. To access international calls for as little as half a penny per minute go to
http://callchecker.moneysavingexpert.com/intca llchecker/ allowing you/assistant to spend as much time talking to people in Canada as necessary without giving any thought to how much it is costing - phoning a UK 087 number for a few minutes is more expensive than an hour to Canada. Good luck.