If you are looking for budget solution to Canada we have great option for you! This deal is based on Icelandic low-cost airlines WOW Air with a stop in Reykjavik on your way to North America. Return flights from Europe to Toronto are now available already for £202 (€232)! If you can travel with hand luggage only this is final price including all taxes and fees. If interested look for flights departing from UK (Bristol, London), Amsterdam, Copenhagen, Dublin, Berlin or Stockholm. 
If you consider to book this deal with WOW Air you may find the lowest fares in September 2016 (or beginning of June). Please refer to below booking samples from each origin.:
Booking samples
Travel dates with WOW Air.: The fastest way is to check here directly with the airline as the travel days vary by each origin. To check your connection possibilities we recommend to use Skyscanner. This tool gives you quickly an idea which low-cost airlines are available from your home city. To book some afforeable accommodation in Toronto you may use Booking.com or consider following promo codes offered by Ebookers, Hotelopia or Venere.
Booking sample of cheap return flights from Europe to Toronto already for £202 (€232) here. In this case you would fly from London to Toronto on 25th of September. You would return from North America back to UK on 9th of September 2016.
