I would like to recommend 2 additional airports for Canada.
Halifx International. This is the most important airport on the east coast of Canada, servicing the entire maritimes region of the country. In 2011, Halifax had 3,594,164 passengers move through the terminal.
Ottawa International. This is the airport that services the captial of Canada. For this reason alone it should be added. In 2011, Halifax had 4,624,626 passengers move through the terminal. In 2010 they moved 28,450 metric tonnes of cargo.