The tie-up, brokered by Cocktail Marketing, begins later this month. It will give Dorothy Perkins customers the chance to win a New York shopping break, with accommodation at the Crowne Plaza hotel in Times Square.
In addition, holders of a Dorothy Perkins store-card are being offered 25% off stays at InterContinental-owned hotel chains Holiday Inn, Express by Holiday Inn and Crowne Plaza.
The partnership will be promoted through a mailing to 500,000 store-card holders, an e-newsletter and the Dorothy Perkins website.
InterContinental comprises seven hotel brands and operates across nearly 100 countries. It owns, manages or franchises more than 3700 properties across the world.