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 that 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.Right now, we’re seeing great fares from just $312 round-trip to Madrid (MAD) and Barcelona (BCN) from cities across the US, including Newark (EWR), Los Angeles (LAX), Boston (BOS), Miami (MIA) and Fort Lauderdale (FLL). These flights will be on either Norwegian or TAP Portugal and are available beginning this November all the way to March 2018. Sift around on Google Flights for an itinerary that works with you, and then book directly through the airline.Airline: Norwegian and TAP PortugalRoute: LAX/BOS/MIA/FLL/EWR to BCN/MADCost: $312 round-trip in economyDates: November 2017 — March 2018Booking Link: OrbitzPay With: The Platinum Card from American Express (5x on airfare), Chase Sapphire Reserve, Citi Prestige (3x on airfare) or Chase Sapphire Preferred (2x on travel)Here are a few examples of what you can book:Boston (BOS) to Barcelona (BCN) for $312 round-trip:Boston (BOS) to Madrid (MAD) for $328 round-trip:Newark (EWR) to Barcelona (BCN) for $344 round-trip: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.Ft Lauderdale (FLL) to Barcelona (BCN) for $362 round-trip:Miami (MIA) to Barcelona (BCN) for $379 round-trip:Miami (MIA) to Madrid (MAD) for $380 round-trip:Los Angeles (LAX) to Barcelona (BCN) for $392 round-trip: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 (3x 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!