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, 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.American Airlines is currently offering heavily discounted fares for flights to Puerto Rico. American seems to be matching JetBlue’s prices after the airline announced a massive sale yesterday. You can fly from New York (JFK) or Boston (BOS) to San Juan, Puerto Rico (SJU) for just $100 round-trip from now through the middle of November. These are incredibly low prices for a great destination. Although, there is still a CDC travel warning to Puerto Rico due to the prevalence of the Zika virus. Make sure you know how to protect yourself from the Zika if traveling to the island.Airline: AmericanRoute: BOS and JFK to SJUCost: $100+ round-trip in economyDates: September - November 2016Booking Link: ExpediaPay With: Chase Sapphire Reserve, Premier Rewards Gold Card from American Express, Citi Prestige Card or Chase Sapphire PreferredHere are a few examples of what you can book:New York (JFK) to San Juan (SJU) for $100 round-trip in October:New York (JFK) to San Juan (SJU) for $100 round-trip.Boston (BOS) to San Juan (SJU) for $107 round-trip in November:Boston (BOS) to San Juan (SJU) for $107 round-trip.Maximize Your PurchaseSign 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.Don’t forget to use a credit card that earns additional points on airfare purchases, such as the Chase Sapphire Reserve, Premier Rewards Gold Card from American Express 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!