All depends upon how many times faster than the speed of light you travel. Multiply it by 5, 10, 20, 100 times, and you've now got the ability to reach across the Milky Way galaxy with ease.
It may look like a fanciful concept from the vantage point of our current level of technological prowess (and understanding), but give it another century and it won't seem far fetched at all.
Your great grandchildren may well drive to Alpha Centauri one day.
I doubt it i had mumps as a child
The nearest star system is only about 4.3 light-years away. Meaning that at the speed of light (186,000 miles/second) it would take 4.3 years to get there.
One light-year, the distance light travels in one year, works out to about 5.9 *trillion* (with a T)(1,000 x a billion) miles.
And so: 5.9 x 4.3 = 25.4 trillion miles (Alpha Centauri)
Alpha Centauri was the place the Lost In Space crew meant to go.