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.Update: Some offers mentioned below are no longer available. View the current offers here – Citi Prestige CardAirfare 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 Platinum Card® from American Express, 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.The Hawaii fare sale continues, with round-trip tickets on a variety of carriers starting at $391 from a number of cities across the continental US. The greatest availability seems to be from now through May, and then again from August through December 2018. No tricks needed to find these airfares — just find the dates you want by searching with Google Flights, then book on Orbitz, Expedia or directly with the airline itself.Airline: American, UnitedRoutes: OKC/ELP/FLL/MKE/BNA/BOS/RDU/SAT to HNL/OGGCost: $391+ round-trip in economy classDates: February-May and August-December 2018Booking Link: Orbitz, Expedia or directly with the airlinePay With: The Platinum Card from American Express (5x Membership Rewards® points on flights booked directly with airlines or with American Express Travel), Chase Sapphire Reserve, Citi Prestige (5x on airfare plus excellent trip delay insurance) or Chase Sapphire Preferred Card (2x points on travel and dining at restaurants worldwide)We tested a number of different airports that weren’t included in yesterday’s similar deal. Here are a few examples of what you can book:El Paso (ELP) to Maui (OGG) in April for $391 round-trip on American:Oklahoma City (OKC) to Honolulu (HNL) in May for $393 round-trip on United: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 Antonio (SAT) to Maui (OGG) for $414 round-trip in March on American:Raleigh-Durham to Honolulu for $424 round-trip in April on United Airlines:Nashville (BNA) to Honolulu (HNL) for $474 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 Platinum Card (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.H/T: The Flight Deal