Of the two Voyagers, Voyager I is the farthest away at over 13 billion miles. It is outside the solar system and now in Interstellar space. In this video, we see William Shatner at NASA, read a 60 character message to Voyager, which is then sent out. It takes over 19 hours for this signal to reach Voyager I.
Here is the video:
[youtube https://www.youtube.com/watch?v=5VzVyYbPbJY]