Yes, according to our current understanding of physics, there is a limit to how fast spacecraft can travel. This limit is defined by the speed of light in a vacuum, denoted as "c," which is approximately 299,792 kilometers per second (186,282 miles per second).
According to Albert Einstein's theory of special relativity, as an object with mass approaches the speed of light, its energy and momentum increase, and its mass effectively becomes infinite. This means that it would require an infinite amount of energy to accelerate an object with mass to the speed of light, making it practically impossible to achieve.
As an object with mass accelerates closer to the speed of light, it also experiences time dilation, length contraction, and other relativistic effects. Time dilation means that time appears to pass more slowly for the object in motion relative to an observer at rest. These effects become more pronounced as the object's velocity approaches the speed of light.
While there have been proposals and ongoing research into concepts like warp drives, wormholes, and other speculative ideas that could potentially allow for faster-than-light travel, they remain purely theoretical and speculative at this point. As of now, our understanding of the laws of physics suggests that spacecraft cannot travel faster than the speed of light.