Update: Some offers mentioned below are no longer available. View the current offers here.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, which allows you to cancel flights without penalty by 11pm Eastern Time within one day of booking. Remember: Fares may disappear quickly, so book right away and take advantage of Orbitz’s courtesy cancellation if you’re unable to travel. Additionally, keep in mind that discounted partner fares may not earn miles with US-based carriers.Summer travel deals to Spain are normally some of the most difficult to come by. But right now, several Star Alliance and SkyTeam airlines are offering heavily discounted tickets from Oneworld hubs such as Dallas (DFW), Philadelphia (PHL), Miami (MIA) and St. Louis (STL) to many cities in Spain including Barcelona (BCN) and Madrid (MAD). These discounted fares are valid for departures in August through mid-December 2016. The August flights are pricing out at a slightly higher cost, but still at or under $500 round trip. Most itineraries include a stop at a SkyTeam or Star Alliance hub, but there are a few nonstop options.Airline: Star Alliance and SkyTeamRoute: US cities to SpainCost: $441+ round-trip in economyDates: August - mid-December 2016Booking Link: OrbitzPay With: Premier Rewards Gold from American Express, Citi Prestige or Chase Sapphire PreferredHere are a few examples of what you can book:Philadelphia (PHL) to Barcelona (BCN) for $441 round-trip on United in October:Philadelphia (PHL) to Barcelona (BCN) for $441 round-trip on United.Philadelphia (PHL) to Madrid (MAD) for $460 round-trip on Delta in October:Philadelphia (PHL) to Madrid (MAD) for $460 round-trip on Delta.Miami (MIA) to Madrid (MAD) $472 round-trip on Air Europa in November:Miami (MIA) to Madrid (MAD) for $472 round-trip on Air Europa.Dallas (DFW) to Barcelona (BCN) for $503 round-trip on United in August: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.Dallas (DFW) to Barcelona (BCN) $503 round-trip on United.Maximize Your PurchaseDon’t forget to use a credit card that earns additional points on airfare purchases, such as the American Express Premier Rewards Gold 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.H/T: The Flight DealIf you’re able to score one of these tickets, please share the good news in the comments below!