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The average distance between the sun and the earth is 149 million kilometers (93 million miles).

Because of earth's elliptical orbit around the sun, the distance changes over the course of a year (one complete orbit of the sun):

We are closest at perihelion, during winter in the Northern Hemisphere (around January 3rd) at the minimum distance of 147 million km (91 million miles).

We are farthest away at aphelion, during summer in the Northern Hemisphere (around July 4th) at the maximum distance of 152 million km (94.5 million miles).

Light from the sun takes roughly 8 minutes to reach the earth traveling, of course, at the speed of light. Therefore you can say the sun is 8 light minutes away from the earth, just as you can say a star is light years away.

The distance from the sun to the earth is one Astronomical Unit (AU).
An AU, as defined by the International Astronomical Union, is the mean distance between the sun and the earth. That mean (or average) distance is about 149 million km (93 million miles).

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