Radio waves travel at 186,282 miles per second. Divide the distance to Venus by the speed of the radio waves: 30,000,000 / 186,282 = 161 seconds 161 seconds divided by 60 to convert into minutes: 161 / 60 = 2.6 minutes On average it takes a radio wave 161 seconds (2 minutes 41 seconds) to travel from Venus to Earth.t the closest distance, Venus is about 23.7 million miles away from Earth, and radio waves, in a vacuum travel the speed of light (about 186,000 miles per second) so therefore it would take a radio wave about 127.42 seconds -- 2 minutes and 7.25 seconds to get to Venus from Earth. XpretenderX · 6 years ago.