As you might expect, there's some fine print to consider. You'll need to travel between October 31 and February 14, 2018, and there are a handful of blackout dates (Thanksgiving, Christmas, and New Year's) you'll have to work around. But the good news -- especially for anyone who struggles with packing light -- is that unlike some budget airlines, Southwest allows you two checked bags per ticket.
The sale ends on October 12 at 11:59pm, but you'll want to act fast to snag the best fares before they're sold out. Though even if you don't manage to book anything this time around, odds are Southwest has another flash sale on deck sometime in the near future.