The speed of radio waves is approximately 185 miles per second, which is also the speed of light. The reason that radio waves travel at the speed of light is that they are a type of electromagnetic radiation. Other forms of electromagnetic radiation are X-rays and light.
Electromagnetic waves are produced by an electric charge's vibration. The transverse vibrations transmitted by electromagnetic waves go through both magnetic and electrical fields.
Some properties of electromagnetic waves are that they can travel through a vacuum like space or through matter. However, when an electromagnetic wave like light travels through a material, it travels at a slower speed. These waves have long wavelengths that are between 1 and 600 miles, and their corresponding frequencies are low.