Every now and then (typically a few times a month), JetBlue runs Flash Sales that last anywhere from an hour to a day from when they are announced. They are typically for last minute flights for limited routes. While every flash sale will not work for every person, if one of the included routes works for you, you can grab a seat for an incredible low price! Many times these flash sales include $20 fares!
Since these fares are available for an extremely limited time only, it is important to find out about them as soon as they are announced! I highly suggest following @JetBlueCheeps on Twitter as they are the ones that always announce the flash sales. You can even sign up for Twitter alerts, so every time they tweet you can receive a notification on your phone. However, they do tweet about non-flash deals as well so you might end up with more text alerts then you desire.
For those with some flexibility, these flash sales can be great! Hopefully you’ve been able to take advantage of some in the past.