For Toronoto to Phoenix – $247 when departing on Tuesday and returning Tuesday or Wednesday (depends on actual week). Didn’t explore all possible options, but saw this deal for November departures and up to January returns.
For Phoenix to Toronto – $277. This deal seems to have more date combos (even Sunday returns).
All Non-stop.
Uses Air Canada Tango.
Cheapest Round Trip price I’ve seen in years!