It takes 40 to 45 minutes at 425 degrees Fahrenheit to bake a pie with canned cherry pie filling. This is for a pie with two crusts, one on the bottom and one on the top. It is not necessary to pre-bake the bottom crust before assembling the pie.
After the first 15 minutes of baking time, remove the pie from the oven and cover the edges with strips of aluminum foil to prevent the edges of the crust from burning. Return the pie to the oven for the remaining baking time, and check it after a total of 40 minutes. The pie is done when the crust is golden brown. Allow it to rest for an hour before serving to give the filling enough time to set.