Fly Anywhere on jetBlue All You Like as Often as You Like for US$599
You read the title of this entry correctly: All you can jet on JetBlue in one month for $599, including domestic taxes and fees but not including international and Puerto Rico taxes and fees, on any available seat on any flight systemwide between September 8 and October 8.
However, there are restrictions and limitations with the jetBlue All-you-can-Jet pass, such as a 3-day advance purchase is required, and there is a $100 penalty if you miss a flight or cancel within the three days. One does earn 35 TrueBlue points.
Please read both threads for more information and details.