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 11:00pm Eastern Time within one day of booking. But if you’re using The Platinum Card® from American Express, you’ll need to book directly with the airline or through the 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.Flights to Spain are on sale! You can fly on Norwegian nonstop to either Madrid or Barcelona from all its US gateways for under $400 round-trip. Or you can fly Delta, American or Iberia nonstop to Spain for just over $400 round-trip. Want to make the trip easier with extra legroom, better catering and more miles? Upgrade to premium economy for just over $800 round-trip. And if you’re looking to earn American Airlines elite status, you’ll want to book these cheap fares through a partner like British Airways, Iberia or Finnair.You can find these fares by heading to Google Flights and plugging in your desired departure and destination cities. After finding the dates that work best for you, book directly with the airline or with an OTA such as Expedia or Priceline.Airlines: Norwegian, Delta, American, IberiaRoutes: EWR/OAK/FLL/LAX/JFK to BCN/MADCost: $339+ round-trip in economy, $809+ round-trip in premium economyDates: September 2018 to May 2019Booking Link: Orbitz, Expedia or directly with the airlinePay With: The Platinum Card® from American Express (5x on airfare), Chase Sapphire Reserve, Citi Prestige (5x on airfare plus excellent trip delay insurance) or Chase Sapphire Preferred Card (2x on travel)Here are a few examples of what you can book:Newark (EWR) to Barcelona (BCN) in November for $339 round-trip ($165 outbound + $174 return) on Norwegian:Newark (EWR) to Barcelona (BCN) in November for $350 round-trip on Norwegian:Oakland (OAK) to Barcelona (BCN) in October for $354 round-trip ($170 outbound + $184 return) on Norwegian/LEVEL:Fort Lauderdale (FLL) to Madrid (MAD) in November for $360 round-trip ($175 outbound + $185 return) on Norwegian:Los Angeles (LAX) to Barcelona (BCN) in October for $377 round-trip ($180 outbound + $197 return) on Norwegian:New York-JFK to Barcelona (BCN) in February 2019 for $409 round-trip on Delta:New York-JFK to Madrid (MAD) in January 2019 for $414 round-trip on Iberia:New York-JFK to Barcelona (BCN) in February 2019 for $808 round-trip on American Airlines’ 777 premium economy:New York-JFK to Madrid (MAD) in November for $813 round-trip in Iberia’s premium economy on its brand-new A350 via AA:New York-JFK to Madrid (MAD) in November for $813 round-trip in Iberia’s premium economy on its brand-new A350 via British Airways (earns 7,177 award miles; 10,766 EQM and 1,435 EQD credited to AAdvantage):Maximize Your PurchaseDon’t forget to use a credit card that earns additional points on airfare purchases, such as the Platinum Card® from American Express (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.Featured image via Getty Images.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.