The airline's latest fare fire sale features deep discounts on roughly two dozen one-way flights. You can scope out the full lineup at JetBlue's flash sale site, and easily sort your options by departure city, arrival city, and fare price. To get in on the action you'll need to book by 11:59pm on Friday March 23, when this particular sale ends.
Although all the deals are great, some particular highlights include a $20 flight from Boston to Pittsburgh, a $20 flight from San Francisco to Long Beach, and a $40 flight from New York to Ft. Lauderdale. You'll also need to be able to travel pretty soon, since these super cheap fares only apply to certain flights on specific dates, most of which are in the first and second week of April. Still, if you have the freedom to move your schedule around a bit you could book yourself a nice little mini vacation on a seriously low budget.