About 100 million
3500 according to the BBC.
Answering "How many people fly to Canada each year?
There are millions of planes that fly over Cuba on a daily basics. There is to many to count.
Of course, planes can fly.
There are many places where bush planes are known to fly. Bush planes are known to fly in places such as the Alaskan tundra, the Australian outback, and the Canadian north.
Yes many planes can fly at the speed of the sound. Some can fly more than 3 times the speed of sound.