Will humans ever be able to travel to other planets in the future.?

Define what you mean by future. The next decade, next 50 years, what?

We can dream.  Sometimes those dreams can come true, but we need to understand the fabric of space(if there is such a thing).  Maybe it is beyond how we understand Physics today.

Not if we keep electing morons like Bush Jr.and Trump.

"Be able to" is an interesting turn of phrase that almost makes this a philosophical question.  In a sense we have always been able to build robots with human intelligence, because there's a way to do it from the raw materials we have always had available to us.  However, the enormous chain of scientific and technological achievements which would lead to that being possible still hasn't reached that point and it may never do so.  But we can extract silicon now and build sophisticated computers, and that's probably a major part of the journey to being able to do so. We also know it's possible because we are ourselves intelligent and purposeful lumps of matter.  However, at some point the decision may be made not to go there because of the perceived risks of artificial intelligence.  It's the same with human travel to other planets.   Not only is it possible, but it was thought that people would be landing on Mars by 1980 during the Apollo missions, at which point it would've been possible to build on the acquired skills and infrastructure to achieve that goal much more quickly than we would currently be able to.  So the issue is really whether the whole human race has the will to achieve that, and it clearly hasn't, partly because publicly-funded projects are less popular than they were in the 1960s.  So the answer, sadly, is no, even though it wouldn't be that difficult.

Yes of course they will Humans are smart

At the International Astronautical Congress of 2016, Elon Musk announced his plans to build large spaceships to reach Mars. Using the Starship, Musk planned to send at least two uncrewed cargo ships to Mars in 2022. The first missions would be used to seek out sources of water and build a propellant plant. Musk also planned to fly four additional ships to Mars in 2024 including the first people. From there, additional missions would work to establish a Mars colony. These goals are however facing delays.

Sure. They will go to Mars in a few years. Then Europa or Titan or Enceladus in several decades. But it will be thousands of years before we can go to the stars. 

maybe , but without taking our bodies along. Our bodies won't tolerate accelerations of more than a few G. Other than that, a one-way-trip to Mars is the most we can do. We don't have infinite fuel to take along

darpa has a warp engine , space x is building the crafts . a trip to mars  is  less than a week .  they are already shutling water for lakes on mars . those early ' explorer ' missions were actually to spread moss , litchen , and cyanobacteria , to try to grow an O2 atmosphere on mars . the rich are hoarding billions for the hugely expensive one way tickets and starter condo on mars . 

At the rate space junk is piling up, there will not be a open space in our atmosphere for them to get into space through.

The question actually is the a reason too! None of the planets in our solar system are habitable. If it is wrong for us to cause climate change on this planet then it is wrong to cause climate change on another planet.

The way humans trash things- I sure hope not. Take a look at how civilization is making the place we do live nothing but a big garbage can. It seems to me we had better learn how to be wise here and not go trashing the universe with our industrial sludge.