A year on Pluto is 247.92 sidereal years (Earth years).
Pluto revolves round the sun all the time.
Becaus it is so far away from the sun, it has a bigger orbit, so it takes Pluto a long time to travel around the sun
The time it takes Pluto to revolve around the sun is 247.9 Earth years. Pluto's rotation takes 6.39 Earth days.
A long time.
Pluto's month, defined as the time it takes for the dwarf planet to complete one orbit around the sun, is about 248 Earth years. This means that it takes that long for Pluto to complete a full cycle of seasons.
Pluto last completed a full orbit around the sun on September 5th, 1993. It has not completed a full orbit since then.
Pluto is closer to the sun on average than Eris is, but both have probably existed for about the same amount of time.
If you still consider Pluto a planet, than Pluto takes the longest time to move around the sun. If not, Neptune takes the longest amount of time.
Pluto revolves round the sun all the time.
Pluto moves around the Sun, not the earth
According to Wikipedia, on Pluto a "...year lasts 90,613.305 Earth days, 248.09 Earth years or 14,164.4 Pluto solar days." One planetary year is the length of time it takes that planet to travel from one place all the way around the sun and return to the same place.
Pluto's jouney around the sun takes about 248.4 earth yaers