Update: Some offers mentioned below are no longer available. View the current offers here.On Tuesday, Southwest launched a huge airfare sale, with one-way fares ranging in price from $49-$149 for travel from August 24 through December 16. Originally, the sale was scheduled to wrap yesterday, but because of technical difficulties that may have made it difficult for some customers to book, the airline has extended the discount for another day. There are hundreds of routes to choose from, with many of the airline’s key markets covered. You have until 11:59pm (local time in the originating city) tonight to book, so get on it!Here’s a look at some sample fares that are currently available:Boston (BOS) to Baltimore (BWI) for $49:Boston (BOS) to Baltimore (BWI) for $49.Cleveland (CLE) to Chicago (MDW) for $49:Cleveland (CLE) to Chicago (MDW) for $49.Chicago (MDW) to Kansas City (MCI) for $49:Chicago (MDW) to Kansas City (MCI) for $49.Another great thing about this sale: It means Southwest Rapid Rewards redemptions are also on sale, with flights starting at 2,273 points each way.If you want to save your cash, you could redeem less than 5,000 Southwest Rapid Rewards points for a round-trip flight between Minneapolis and St. Louis, which isn’t a bad deal at all (heck, it’s a steal!).Terms and Conditions:Sign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.Blackout Dates Apply: September 3-5, September 7, and November 20 - December 1, 2015. Travel not valid on Fridays and Sundays. Travel to/from Florida or Nevada is valid only on Tuesdays and Wednesdays. Travel to/from San Juan, Puerto Rico is valid only Mondays through Thursdays.Maximize Your PurchaseDon’t forget to use a credit card that earns additional points on airfare purchases, such as the American Express® Gold Card or Citi Prestige (3x on airfare) or the Chase Sapphire Preferred Card (2x on all travel purchases). Check out this post for more on maximizing airfare purchases.Do you plan on taking advantage of this fare sale? Feel free to comment below.[card card-name=‘Chase Sapphire Preferred® Card’ card-id=‘22125056’ type=‘javascript’ bullet-id=‘1’]