Google Earth or Google Maps gives you a selection of Aerial photographs taken at about 5000 ft of the ground so may include things that are not on your map. It is really of more use for finding or identifying specific features than planning a route. It can be useful to tell if an airfield marked on a map can actually be seen as an airfield
In some areas where the aerial photos have not been completed, you see an old out of date Landsat image that's not much use for anything.
It does have a feature to simulate flying the route. That's more of a game than any practical use. Go to Tools then Enter Flight Simulator.