Originally Posted by
nd2010
Some people living in Buffalo choose to fly out of Toronto to another US city. Similarly, people in upstate NY, VT, and NH choose to fly out of Montreal
What would the advantage be of a New York resident crossing into Canada to take a flight back into the USA? International might make sense but back into the USA doesn't.
As to the original question, Canada will never allow cabotage. Air Canada would be out of business in a year.