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.Cancun deals are back this week with flights on American, Delta and United. In early August, there were a few opportunities for discounted flights to Cancun, Cabo and Puerto Vallarta on US Airways — here’s another chance if you missed out then. Beach-bound flyers can depart from Denver, Newark, San Francisco, Washington, D.C. and other cities around the US. The cheapest deals flights we found start at $238 from Newark and $240 from Washington, D.C. on American Airlines. Deals are also available from Denver and San Francisco starting around $310.Airline(s): American, Delta, UnitedRoute(s): CLE, DCA, DEN, EWR, ORD, SEA, SFO and more to CUNCost: $238-$312 round-trip in economyDates: September 2015 through May 2016Elite Mileage Earning: At least 2,904 elite-qualifying milesFare Class: N, O or VBooking Link: OrbitzPay With: American Express Premier Rewards Gold, Citi Prestige or Chase Sapphire PreferredHere are a few examples of what you can book:Update: Fares have dropped again! Now starting at just $196 round-trip.Newark (EWR) to Cancun (CUN) for $196 on American (earns 3,189 EQMs):Newark (EWR) to Cancun (CUN) for $196 on American.Washington (DCA) to Cancun (CUN) for $240 on American (earns 2,904 EQMs):Washington (DCA) to Cancun (CUN) for $240 on American.Chicago (ORD) to Cancun (CUN) for $262 on United (earns 2,888 PQMs):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.Chicago (ORD) to Cancun (CUN) for $262 on United.San Francisco (SFO) to Cancun (CUN) for $311 on Delta (earns 5,639 MQMs):San Francisco (SFO) to Cancun (CUN) for $311 on Delta.Denver (DEN) to Cancun (CUN) for $312 on American (earns 4,031 EQMs):Denver (DEN) to Cancun (CUN) for $312 on American.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 (3 points per dollar on airfare) or the Chase Sapphire Preferred Card (2 points per dollar on all travel purchases). Check out this post for more on maximizing airfare purchases.For more on Cancun, check out our Destination of the Week post.H/T: The Flight DealIf you’re able to score one of these tickets, please share the good news in the comments below!