Marriott is giving customers something to cheer about this holiday season. The company announced that it’s offering up to 20% off room rates at select New York City properties when booking directly from Marriott.com. The deal is good for select dates at 18 New York City properties — reservations are prepaid and are nonrefundable.The stay must be booked between December 28 and December 31, 2015 for travel between January 1 and April 30, 2016. Because this deal can’t be combined with other promotions, be sure to look at all available options to make sure you get the best deal. The 18 participating hotels within Marriott’s NYC portfolio include:New York Marriott MarquisThe Algonquin Hotel Times SquareNew York Marriott at the Brooklyn BridgeNew York Marriott East SideJW Marriott Essex House New YorkRenaissance New York Times Square HotelRenaissance New York Hotel 57New York Marriott DowntownCourtyard New York Manhattan Midtown EastCourtyard New York Manhattan Herald SquareCourtyard New York Manhattan SoHoCourtyard New York Manhattan ChelseaCourtyard New York Manhattan Fifth AvenueCourtyard New York Manhattan/Times SquareCourtyard New York Manhattan/Central ParkResidence Inn New York Manhattan/Central ParkResidence Inn New York Manhattan/Times SquareSpringHill Suites New York Midtown/Fifth AvenueTo book, go to Marriott.com and use the promotional code ADV to take advantage of the discount. Here are some examples of stays you can book at a few of the Marriott properties included in the flash sale:The Algonquin Hotel.From February 19-21, rates at The Algonquin Hotel Times Square were going for $229 for a Guest room with one queen or double and $249 for a Deluxe Queen. With the ADV code applied, rates dropped to $195 and $212, respectively, per night.New York Marriott East Side.From February 28 to March 4, rates at the New York Marriott East Side were going for $209 for a Classic Double and $219 for a Classic King. With the ADV code, rates dropped to $167 and $175, respectively, per night.New York Marriott Downtown.From February 19-21, rates at the New York Marriott Downtown were going for $169 for a Deluxe King and $189 for a Deluxe Double. With the ADV code, rates dropped to $135 and $151, respectively, per night.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.Ultimately, if the flash sale is worth it is up to you. Other discounts when booking with Marriott might give you more savings, such as the AAA discount or the senior discount. If you do decide to take advantage of the flash sale and travel to the Big Apple, be sure to check out our points and miles guide to New York City.