Like all airlines, Southwest is very active in matching prices of their competitors who fly the same

Southwest files its Click-n-Save specials every Monday night in the 8pm domestic airfare distribution (there are 3 domestic airfare distributions each weekday: 10am, 1pm and 8pm), and it hits their reservation system in the wee hours of the morning the next day.
So Tuesday morning is one of the best times to shop, but there are some caveats these specials typically cheap honeymoon cruise include limited routes that Southwest wants to try and fill up, seat-wise for particular travel days. In other words, it is not (usually) an across-the-board sale.
Southwest normally matches competitors sales (which are usually filed Monday night at 8pm Eastern as well) and Southwest usually cheap honeymoon cruise matches by the Tuesday 1pm domestic airfare distribution, which then hits their reservation system at approximately 3pm Eastern (these cheaper prices are typically pulled 3 days later on Thursday night).
Like all airlines, Southwest is very active in matching prices cheap honeymoon cruise of their competitors who fly the same routes as they do on a daily basis (both nonstop and connecting flights). Just so you know, Southwest serves just under 70 cities, while the legacy airlines typically serve between 130-240 non-code share cities.
One easy way is to stay on top of sales from all airlines is to follow our airline ticket deals blog which posts advertised sales for worldwide airlines cheap honeymoon cruise on a daily basis (follow with a RSS reader if you have one or on Twitter @farecomparedeal ).
If you have specific locations in mind, sign up for our realtime email airline ticket price drop alerts no airline cheap honeymoon cruise wants to be undercut so following all airlines on a route for your next trip is the best way to know exactly when to shop and buy (let us do all the heavy lifting).
Southwest is also very active on Facebook (/Southwest) and Twitter ( @SouthwestAir ) and the airline will sometimes announce special deals on these channels at various times, and this is in addition to their blog and email communications.
If you have an issue, grab your smart phone and post on their Facebook page or tweet your problem you re likely to get a faster response as Southwest has PR people manning those social media channels full-time.