Hotels.com takes an extra 10% offselect hotel stays via coupon code "HOTELDEALS13". Better yet, it even applies to most stays in their Save, Save, Save! section, which are already discounted by up to 50% off. That's one of the best general percent-off coupons we've seen from Hotels.com in recent weeks. (We saw the same discount along with 5% off 5-star hotels and $100 off select stays last month.) Additional fees, taxes, and restrictions may apply. Book by May 6 for travel through September 30.