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 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.London doesn’t have a reputation of being a cheap destination to fly to, so we get excited whenever airlines offer great fares to the British capital. This time, it’s Norwegian providing the deals — fly round trip from a variety of cities in the US from just $285 round-trip. The cheap fares are available generally from December 2017 through February 2018, though exact availability depends on where you’re originating from.Norwegian’s economy product is fairly comfy on the 787.Keep in mind that when booking with Norwegian, it’s often cheaper to book using Google Flights’ separate tickets feature. And in this case, you’ll want to book the ticket in British pounds in order to get the best deal.Airlines: NorwegianRoute: BOS, FLL, JFK, OAK to LGWCost: $285+ round-trip in economyDates: December 2017 - February 2018Booking Link: NorwegianPay 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:Boston to London (LGW) for $285 round-trip in February:New York (JFK) to London (LGW) for $337 round-trip in January: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.Fort Lauderdale (FLL) to London (LGW) for $356 round-trip in February:Oakland (OAK) to London (LGW) for $409 round-trip in December: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 (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!