Theoretically, if we had the technology to travel at the speed of light, it would take approximately 2.5 million years to reach the Andromeda Galaxy. However, currently, we do not have the technology to travel at such speeds, and the fastest spacecraft ever launched by humans have only reached speeds of a fraction of 1% of the speed of light.

At current technological levels, it would take tens of thousands of years to reach the Andromeda Galaxy using conventional propulsion methods such as chemical rockets, even if we were to travel continuously without stopping.

Therefore, reaching the Andromeda Galaxy remains a challenging and long-term goal that would likely require significant advances in propulsion technology and a deep understanding of the physical and biological implications of interstellar travel.