I've been monitoring SW for an August trip. Yes I know it's March, but you never know what you'll find or when. I like to look at the whole monthly calendar if I don't have set dates in mind. Today I found fares well under $100 O/W from DCA. Times were a little later than we normally like to leave, but I'm not stupid. $78 each O/W. And now those same tickets are back up to $174. There are still several under $100 fares for July and August. Worth checking if it fits your schedule.