Megabus offers 1-way bus rides to/from San Francisco to select cities in California and Nevada for $1, as seen on Travelzoo. (A 50-cent service charge applies.) That ties last week's mention as the second least-expensive travel option we've seen from Megabus this year. Note that seat availability at this discounted price is limited and varies by date. Destinations include Sacramento, Los Angeles, and Reno. Book by December 31 for travel through February 28, 2013.