From now through 11:59pm ET, the beloved carrier is offering discounted tickets -- some as low as $20 -- for more than a dozen one-way flights to domestic and international destinations from airports across the United States. JetBlue's sale page has the full list of deals (you can sort them by price and origin city), including highlights like Boston to NYC for $20, NYC to West Palm Beach, Florida for $40, and even an $80 flight from Boston all the way to San Francisco. And this is on JetBlue, which offers free in-flight WiFi and unlimited snacks for every passenger, not a no-frills discount carrier.
As for deals to destinations outside of the continental US, you can choose from discounted flights like Fort Lauderdale, Florida to Havana, Cuba for $70, Orlando to San Juan, Puerto Rico for $70, NYC to Cancun, Mexico for $80, or Hartford, Connecticut to San Juan for $80. You just have to get your affairs in order and book the tickets before they're gone.