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 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.More airlines are lowering their fares to Barcelona (BCN) — perhaps we have a fare war on our hands. Many of Monday’s fares from US cities to BCN are still available, but we’re also seeing low fares from more cities, even from the West Coast. You can fly from San Francisco (SFO) for as little as $462 and from Los Angeles (LAX) for $467. We’re seeing low fares from both Star Alliance and Oneworld partners.The easiest way to find these deals is to search for cheap dates via Google Flights. Then click through to Orbitz, Expedia or the airline directly to book your tickets.Airlines: Aer Lingus/American/British Airways/UnitedRoutes: JFK/LAX/MIA/SFO to BCN/MADCost: $410+ round-trip in economyDates: November 2017 — March 2018Booking Link: Orbitz, Expedia or with the airline directlyPay 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:New York (JFK) to Barcelona (BCN) for $410 round-trip with American:Miami (MIA) to Barcelona (BCN) for $414 round-trip with American: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.San Francisco (SFO) to Barcelona (BCN) for $462 round-trip with United:San Francisco (SFO) to Barcelona (BCN) for $463 round-trip with British Airways/American:Los Angeles (LAX) to Barcelona (BCN) for $467 round-trip with British Airways/Aer Lingus: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!H/T: The Flight Deal