At this point, it seems like JetBlue launches a flash sale for cheap plane tickets almost every other week (not that we're complaining or anything). The latest limited-time deal: flights starting at $20.
As of Wednesday afternoon, the popular US airline is offering several discounted one-way fares for domestic and international flights for a limited time, with tickets for one flight going for as low as $20. JetBlue's official flash sale site has the full list of crazy-cheap flights (which you can sort by price), including highlights like Long Beach, California to Oakland, California for $20, New York to Boston for $30, and NYC to Long Beach for $60. There's even a flight from NYC to Barbados for $70. The tickets probably won't last for long, though, so you'd better hurry.