冷凍とかのコストは葬儀屋さんとかに、空輸のコストはエアラインに問い合わせるのが一番だと思います。
ちょっとググったら、費用はエアラインによって大きく違っていて、国内で死体を送る場合は安くて60ドル、高くなると数百ドル以上になる可能性があるって書いてありました。
国際線はもちろんもっと高いとは思いますが、空輸できると仮定すると、何千万円もしないのでは?と思います。
http://www.canadianfunerals.com/funeral-related-articles/air-transportation-of-human-remains-in-canada.html
Options – Non-Cremated Remains, or Cremated Remains Transportation
The major airline companies usually employ a specialized team to deal with this very sensitive cargo. For example, Air Canada operates a special cargo service called ‘Compassion’ that handles the transportation of either non-cremated, or cremated, remains.
As with other airlines, their regulations vary dependent upon domestic or international shipments. Remains normally need to be transported in a casket that is contained within an airtray. The airline will ordinarily provide an airtray, although they may charge for this.
It is difficult to provide a definitive pricing guide for the transportation of remains, as it varies so much by airline, schedule, distance, weight and other pertaining factors. However, as a rough guide you will find the rates for shipping non-cremated human remains within Canada can start from as little as $60 but reach up to $100’s. Most airlines offer a basic fee classified by domestic zones and stratified by weight. The freight charge may also be subject to additional surcharges.
An alternative to shipping the deceased’s body is to ship cremated remains. This can greatly save on costs.