Kayak.com, Expedia.com, Travel.com, and Orbitz.com are all contenders on low-priced airfare. As far as China goes, your best bet is to plug the information into each site and see which gives the biggest discount.
Tickets for China Airline can be purchased from China Airlines website, Fly China, One Travel, Travel China Guide, Expedia, Fare Buzz, Globester, and CheapOair.
US Airways, United, and American Airlines all offer flights from the US to China. For flights from other countries to China, one could fly Cathay Pacific, British Airways, Air Canada, Air France, Lufthansa, or many others.
Delta, American Airlines, Air China, China Airlines, And Korean Air
Northwest Airlines services many countries through out the world. They travel to parts of Australia, France, the United Kingdom, the United States, Canada, and China.
China Cargo Airlines was created in 1998.
China Eastern Airlines was created in 1988.
Northeast Airlines - China - was created in 2006.
China Southern Airlines was created in 1981.
China Southwest Airlines ended in 2002.
China Xinjiang Airlines was created in 1985.
China United Airlines was created in 1986.
China Northern Airlines was created in 1990.