Update: Some offers mentioned below are no longer available – View the current offers hereWant to see the latest flight deals as soon as they’re published? Follow The Points Guy on Facebook and Twitter, and subscribe to text message alerts from our deals feed, @tpg_alerts.Airfare deals are typically only available on limited dates. We recommend you use Google Flights to find dates to fly, then book through an online travel agency, such as Orbitz or Expedia, which allows you to cancel flights without penalty by 11pm Eastern Time within one day of booking. However, if you’re using the American Express Platinum Card, you’ll need to book directly with the airline or through Amex Travel portal to get 5x MR points. Remember: Fares may disappear quickly, so book right away and take advantage of Orbitz or Expedia’s courtesy cancellation if you’re unable to get the time away from work or family.Southwest is celebrating its birthday with the perfect gift for travelers: a flash sale. The sale is valid for travel to both domestic and international destinations, and applies to both revenue tickets and those booked using Rapid Rewards points. Keep in mind that these fares are with Southwest, so each traveler is permitted two complimentary checked bags — perfect if you’re flying with family or a large group.Southwest’s all-economy 737s are perfectly fine, though nothing to write home about.In order to take advantage of these discounted fares, you must book by June 15 at 11:59pm in the respective time zone of the originating city. In addition, travel must be between August 22 and December 16, 2017 for domestic routes and between August 22 and December 13, 2017 for international travel. Blackout dates include September 1, September 4, November 21-22 and November 25-27 for domestic travel. To see a complete list of all of the cities included in this fare sale, click here.Airlines: SouthwestRoutes: Domestic and international routesCost: $42+ one-way, $84+ round-trip in economyDates: August - December 2017Booking Link: SouthwestPay With: The Platinum Card from American Express (5x on airfare), Chase Sapphire Reserve, Citi Prestige (5x on airfare) or Chase Sapphire Preferred (2x on travel)Here are a few examples of what you can book:Los Angeles (LAX) to Las Vegas (LAS) for $42 (or 1,861 points + $5.60) one-way in September:Los Angeles (LAX) to Las Vegas (LAS) for $84 round-trip in September: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.Boston (BOS) to Atlanta (ATL) for $116 round-trip in October:Denver (DEN) to San Diego (SAN) for $45 one-way in August:Fort Lauderdale (FLL) to Belize City (BZE) for $188 round-trip in September:Newark (EWR) to Fort Lauderdale (FLL) for $140 round-trip in August:Orlando (MCO) to Washington, D.C. (IAD) for $90 round-trip in August:Maximize Your PurchaseDon’t forget to use a credit card that earns additional points on airfare purchases, such as the American Express Platinum Card (5x on flights booked directly with airlines or American Express Travel), Chase Sapphire Reserve, or Citi Prestige (5x on airfare) or the Chase Sapphire Preferred (2x on all travel purchases). Check out this post for more on maximizing airfare purchases.If you’re able to score one of these tickets, please share the good news in the comments below!