According to our current understanding of physics, it is not possible for humans or any material object with mass to travel at or exceed the speed of light in a vacuum, which is approximately 299,792,458 meters per second (or about 670,616,629 miles per hour).
As an object with mass approaches the speed of light, its energy requirements to accelerate further increase infinitely, and its mass would also increase. This phenomenon is described by Einstein's theory of relativity, specifically the theory of special relativity. As an object with mass approaches the speed of light, its relativistic mass would become infinitely large, requiring an infinite amount of energy to continue accelerating.
However, it is important to note that the theory of relativity does allow for the possibility of objects without mass, such as photons (particles of light), to travel at the speed of light in a vacuum.
Given the current scientific understanding, it is unlikely that humans will ever be able to travel at or near the speed of light. However, advancements in space exploration and propulsion technologies could potentially allow us to achieve significantly higher speeds compared to what is currently possible. For example, various theoretical propulsion concepts, such as ion propulsion, nuclear propulsion, or even concepts like warp drives or wormholes, have been proposed as potential means for achieving faster space travel. But these concepts are purely speculative and would require significant scientific and technological breakthroughs to become a reality.