I saw this article and thought it might be of interest. There are no flights to Russia but there are several Eastern European/Baltic options. I don't think it's an April Fool's joke -- despite the article date; some one was doing "free" flights a while back -- you had to pick up taxes and fees though. Anyway, here's the article (and no, I don't work for RyanAir):
http://money.cnn.com/magazines/business ... /index.htm