Its relative, its not exact: you don't jump from here to the future.
There are several ways, one I found very plausibles for today's technology
But for instance, if get into a ship, with capabilities to go at light speed.
You travel 1/2 Light speed distance away from earth, and back.
Lets say it took 1 year for the whole trip for the person on the ship.
But when he comes back to earth thousands of years have passed.
One could also live in a Hibernation or Suspended animation, time for him stoped.
It has been calculated that, under general relativity, a person could travel forward in time at a rate four times that of distant observers by residing at the bottom of a 5 meter tall funnel with the mass of Jupiter. For such a person, every one second of their "personal" time would correspond to four seconds for distant observers.
But all have the same principle, isn't about going there, but making time pass slower for YOU.
Hybernation I think is the most attainable on todays technology.
"Chile is a thin and tall country"