Flights with Delta with 1 stopover from Toronto are now only $236-241CDN taxes in, with LOTS of availability, with dates departing from October 17th, returning August 10th, mostly excluding Friday to Sunday travel dates.
Use a Google Flight check to see availability by the month here. Feel free to change the dates that I chose for the search.
Phoenix is also going for $236 but the availability is only for travel in October to mid-December apparently. Click here to do a Google flight search to Phoenix.