What makes the Earth habitable? It is in the right distance from the Sun, it is protected from harmful solar radiation by its magnetic field, it is kept warm by an insulating atmosphere, and it has the right chemical ingredients for life, including water and oxygen.
The Earth is the most habitable planet. If there would be any other habitable planet it is Kepler-62 e. Kepler-62 e is a Earth-like planet. It takes 1,200 light years to travel on that planet.
