Air Canada is a major airline that operates flights to destinations all around the world. Some of the popular destinations that Air Canada serves include:

Cities within Canada: Toronto, Montreal, Vancouver, Calgary, Edmonton, Ottawa, and many more.
Cities in the United States: New York, Los Angeles, Miami, Chicago, Denver, and many more.
Cities in Europe: London, Paris, Frankfurt, Rome, Madrid, and many more.
Cities in Asia: Tokyo, Beijing, Hong Kong, Shanghai, and many more.
Cities in Australia and New Zealand.