Both kind of big places -- okay, well Canada is certainly massive.

Download GoogleEarth to get these distances for yourself, along the surface of the Earth.

Shortest routes are over the North Pole/Arctic regions.

At their closest (northern Afghanistan to Ellesmere Island), they are about 6450 km / 4000 miles apart. At the furthest, they are 11,300 km / 7025 miles apart. About 9500 km /
5900 miles from centre of each country to the other.