To browse and search the full lineup of deals, head to the official Southwest Flash Sale page and filter by departure or destination city.
Of course, as with any flash sale like this there is some fine print to consider. For one, you'll need to be able to travel between September 4, 2018 and February 13, 2019. Also, there are a handful of blackout dates to keep in mind, as the deals don't apply to most travel dates around Thanksgiving, Christmas, and New Year's.
Still, it'd be a shame not to take advantage of whatever PTO you have left, and treat yourself to a little post-summer mini vacation. There really is no excuse not to.