In one year light travels about 6 trillion miles. This is called a light year. It took the Appollo astronauts 4 days to reach the moon. This is equal to 1 light second.
The closest star to our sun, Proxima Centauri is 4.24 light years away from our sun.
It will not be possible to travel to other galaxy's in a human life time, due to the fact that the human and its equipment would not last out the journey.