If we are talking about gliding all the way to the ground then we will end up with a glide slope that is considerably greater than the usual 3 degrees.
Going back to the basics,
Glide range = Lift to Drag ratio x height
Rearranging this gives Lift to Drag ratio equals the cotangent of the glide slope.
For a glide slope of 3 degrees we need a Lift to Drag ratio of about 19 to 1.
Not many commercial transport aircraft will achieve this in the landing configuration.