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 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 the 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.British Airways is offering round-trip flights from US and Canadian cities to London from just $462 round-trip, including cities on the West Coast. For example, you can fly nonstop from Los Angeles to London for only $554, which is phenomenal for long-haul service. Availability is wide open too, with flights being offered from now through September 2017. These prices are even available in peak summer travel months. You may also be able to find similar fares on flights operated by American, Delta, United and Virgin Atlantic.Finally, these flights are eligible for the AARP and Visa discounts, which in some cases will bring your fare as low as $330 round-trip. This is a fantastic deal and might not last long, so book now and plan later!Airline: British Airways and AmericanRoute: BOS, EWR, IAD, JFK, LAX, ORD, PHL, YUL, YVR, YYZ to LGW and LHRCost: $462 round-trip in economy ($330+ with discounts)Dates: December — September 2017Booking Link: British AirwaysPay With: The Platinum Card from American Express (5x on airfare), Chase Sapphire Reserve, Premier Rewards Gold Card from American Express, Citi Prestige (3x on airfare) or Chase Sapphire Preferred (2x on travel)Here are a few examples of what you can book:Boston (BOS) to London (LHR) for $462 round-trip in June:Boston (BOS) to London (LHR) for $462 round-trip in June.Boston (BOS) to London (LHR) for $330 round-trip in December (with AARP and Visa discounts):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.Boston (BOS) to London (LHR) for $330 round-trip in December.New York (JFK) to London (LHR) for $517 round-trip in March:New York (JFK) to London (LHR) for $517 round-trip in March.Los Angeles (LAX) to London (LHR) for $554 round-trip in May:Los Angeles (LAX) to London (LHR) for $554 round-trip in May.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, American Express Premier Rewards Gold 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!