Get up to $100 in cash-back rebates with this Hotels.com coupon code. Book by 12/31. Travel by 1/31/18. Enter the Hotels.com promo code during booking. Then print out the coupon, fill it out, and mail it to the processing department for your cash back rebate.Tip: Come back to this page to copy the coupon code, and then paste it on the store's payment page.