The nearest star outside of our solar system, Proxima Centauri, is about 4.22 light-years away. That's about 39,924,282,594,000 kilometers.
If you wanted to travel to Proxima Centauri at a speed similar to that of the fastest spacecrafts we have today (about 60,000 km/h), then the trip would take about 76,000 years.