A soccer ball can travel as fast as 60 to 80 miles per hour. Its actual speed depends on factors like the angle of kick and forces acting on the ball.
After analyzing penalty kicks for his biomechanics doctoral dissertation, Professor Bob Gustavson, mentions how a ball that travels over 55 miles per hour and hitting within a yard of any of the goalposts is sure to pass the goalkeeper.
A soccer ball that is kicked spins on its axis while moving through the air. Two forces, drag force and lift force act on it. The drag force, which can hinder the ball's movement, is dependent on the turbulent air around the ball. The way a footballer kicks the ball is another aspect that can influence the ball's speed.