Pluto is the last planet known to mankind at the outer edge of our solar system, although scientist believe that there are other planets beyond Pluto. Pluto was once not classified as not a planet, instead just a start, not sure the result today.

However what we know today, according to NASA website http://www.nasa.gov/press/2015/january/nasa-s-new-horizons-spacecraft-begins-first-stages-of-pluto-encounter/#.VMhUif7F9vA The New Horizon Spacecraft should be near or at Pluto in few months, probably before Summer 2015. The voyage appears to taken 9 years.

9 years to walk to Pluto New Horizon spacecraft

So let say if we have a spaceship we could have reach Pluto in less time, fraction maybe, 1 year. People could have been enjoying this 9 years trip, away from the Earth human natural disaster :).