I try to fly SWA as often as I can, but you HAVE to book WAY in advance, I've found, i.e. several months so. Since I'm one of those cops who HAVE to plan their vacations for the year during December the year before, I'm able to know exactly when I need to fly, and watch SWA's web site daily to see when the flights open up. AS cheap and old f__t as I am, I watch prices very carefully. I can imagine that it would be hard to book that type fare on short notice.