Today October. 1st only, Jet Blue offers One Way Airfare for travel on October 31st for only $31! There are only select routes available, but you can check this site here to see all of the options available.
For my Utah readers, it looks like there are a few $31 One Way flights from Salt Lake City to Orlando, Long Beach or New York (JFK).
**The site is being slammed with traffic, so it may take you some time to get through. Also, be sure to check all of the fine print before you purchase.