The phrase "goes on the airwaves" refers to broadcasting a program, message, or signal to numerous listeners or viewers through radio, television, or the internet. Some antonyms for this phrase could be "goes off the airwaves," which means to discontinue a broadcast or signal, or "stays silent," which means to refrain from broadcasting or communicating. Another antonym could be "goes offline," which means to disconnect from a network or online platform, thereby discontinuing broadcasting any content. Lastly, "remains private" could also be an antonym for this phrase, as it means to keep a message or program inaccessible to the public or a select group of people.