Although available travel periods vary from fare to fare, most of these deals apply to travel between the period of April 26 - May 24, 2016. In addition, black out dates apply. But really, you can't complain. These are $20 tickets!
The $20 deals expire tonight, but some of the other sale prices will be available for longer, and you can check out all the details here.
OK, now it's spontaneous vacation time.
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Kara King is a News Writer at Thrillist and actually enjoys flying. Send news tips to firstname.lastname@example.org and follow her at @karatillie.