The distance from Earth to Mars varies a lot, because Earth’s orbit around the sun is might smaller than Mars’ orbit. Earth is the third planet from the sun, and Mars is the fourth.
Imagine two cars on a racetrack, and one is always on the inside while the other is on the outside. Earth is on the inside track, and so it gets around more quickly.
Sometimes it’s close to Mars, when it’s making a pass, and other times it’s far away, at the other side of the track.
The minimum distance from the Earth to Mars is about 54.6 million kilometers or 3.392687 x 10⁷ miles.
The farthest apart they can be is about 401 million km or 2.491698 x 10⁸ miles. The average distance is about 225 million km or 1.398085 x10⁸ miles.
How long does it take to get to Mars? Visit Space.com to find out.