The best pricing can be found in the month of September. Prices to Rio de Janeiro from Billy Bishop Toronto City Airport average C$ 874. You can even find prices in September for less than C$ 874, as users have found deals to Rio de Janeiro from as low as C$ 538. The month of December appears to be one of the more expensive times to travel to Rio de Janeiro from Billy Bishop Toronto City Airport. Flying in the targeted month can save you up to 60%.