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.The US legacy airlines are at it again. Earlier this month, American, Delta and United offered some great fares on flights to China. Today, those fares are back — but to more cities and, in some cases, even cheaper than before. Look for flights to Beijing (PEK) from Phoenix (PHX), Philadelphia/30th Street Station (ZFV), Boston (BOS), Chicago (ORD), Denver (DEN) Las Vegas (LAS), San Diego (SAN) and San Francisco (SFO) starting at just $457 round-trip.Travelers can find availability at these prices with departures from September through April, save for the December holidays. Some of these airfares are even available one-way should you want to use points or miles for the other leg; just use Google Flights to find the dates you want, then book on Orbitz, Expedia or directly with the airline itself. Since these are international trips on mainstream carriers, passengers will get their first checked bag free and a complimentary meal during the flight.While travelers won’t be able to take advantage of China’s “visa-free transit” policy on these itineraries since there isn’t a visit to a third country, be sure you get the proper visa before traveling. TPG recommends using a third-party service like Allied Passport & Visa; mention The Points Guy on your order form and receive a $5 discount.Airlines: American Airlines, Delta Airlines, United AirlinesRoutes: BOS/ZFV/ORD/PHX/LAS/DEN/SAN/SFO to PEKCost: $457+ round-trip in economyDates: September through AprilBooking Link: Orbitz or ExpediaPay 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:Phoenix (PHX) to Beijing, China (PEK) for $457 round-trip on United via Orbitz: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.Las Vegas (LAS) to Beijing (PEK) for $473 round-trip on American via Orbitz:Denver (DEN) to Beijing (PEK) for $473 round-trip on American via Orbitz:Boston (BOS) to Beijing (PEK) for $478 round-trip on Delta via Orbitz:Philadelphia/30th Street Station (ZFV) to Beijing (PEK) for $492 round-trip on United via Orbitz:San Francisco (SFO) to Beijing (PEK) nonstop for $521 round-trip on American via Orbitz:San Diego (SAN) to Beijing (PEK) nonstop for $523 round-trip on American via Orbitz:Chicago (ORD) to Beijing (PEK) nonstop for $528 round-trip on American via Orbitz:Maximize Your PurchaseBe sure 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 (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