Constellations are patterns of stars that appear close together in the sky from our perspective on Earth. However, the stars within a constellation are at vastly different distances from us.
Therefore, there is no single answer to the question "How far away from Earth is Leo?"
Some of the stars in Leo are relatively close to Earth, while others are incredibly far away.
For example:
* Regulus, the brightest star in Leo, is about 77 light-years from Earth.
* Denebola, another bright star in Leo, is about 36 light-years from Earth.
* Alpha Leonis (α Leo), also known as Algeiba, is about 126 light-years from Earth.
To get a specific distance for a star in Leo, you would need to specify which star you are interested in.