Update: Some offers mentioned below are no longer available. View the current offers here.Want 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 Platinum Card® from American Express, 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.If you’re based in our nation’s capital (or anywhere near it), you’re going to want to pay attention. Delta and its SkyTeam partners Air France and KLM are offering amazing fares to Ireland starting at just $350 round-trip. Tickets are available from late August through early December 2017 from both Washington’s Dulles airport (IAD) and Baltimore (BWI) to Dublin (DUB) and Shannon (SNN) and seem to require a one-week minimum stay. Search for your ideal itinerary on Google Flights and then complete booking directly through Delta. Note, too, that it’s possible these tickets are mistake fares, which could result in the airlines canceling the tickets. So, if you do book one of these fares, you may want to hold off on booking lodging until it’s confirmed that these tickets will be honored.Airlines: Delta/Air France/KLMRoutes: BWI/IAD to DUB/SNNCost: $350+ round-trip in economyDates: late August through early DecemberBooking Link: Orbitz or ExpediaPay With: The Platinum Card from American Express (5x on airfare), Chase Sapphire Reserve, Citi Prestige Card (5x on airfare) or Chase Sapphire Preferred Card (2x on travel)Here are a few examples of what you can book:Baltimore (BWI) to Dublin (DUB) for $350 round-trip in December:Baltimore (BWI) to Shannon (SNN) for $354 round-trip in August:Washington, D.C. (IAD) to Dublin (DUB) for $378 round-trip in November: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.Washington, D.C. (IAD) to Dublin (DUB) for $392 round-trip in November: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 Card (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!H/T: Scott’s Cheap Flights