Try your luck online with one of these travel websites. Note that fare searches in Chinese sometimes yield lower prices than in English.
Ctrip (http://english.ctrip.com) This site has a simple and well-designed English site. It offers hotel and flight deals.
Elong (www.elong.net) Elong has hotel, flight and car rental deals, but is best known for offering fantastic last-minute bargains.
Golden Holiday (www.goldenholiday.com) The site is available in Chinese and English and sells plane tickets with free delivery within the Fourth Ring Road (usually within two hours). It also lists discounted plane ticket information and budget travel trips and allows you to book hotel reservations.