JetBlue is running a 20% off promotion for all bookings made today only on jetblue.com/promo for all flights originating from the United States and Puerto Rico.
Code: 20FORYOU <- Must use the jetblue.com/promo site to book. Prices are the same as the regular JetBlue.com site.
There are blackout dates from December 16th – January 3rd, 2012. The promotion code expires at 11:59PM EST, November 14th, 2011.
More info regarding the promotion here – JetBlue 20% Off Promotion