The best way to get a discount on a business-class ticket is to sign up for newsletters from the airlines you fly most frequently. Continental’s newsletter listed business-class tickets from the U.S. to Europe over Christmas for as low as $900. But if you want to see the full range of options, many sites send out e-mail alerts with the week’s top deals on first- and business-class fares from more than 30 major domestic and international carriers. When business travel is at a low—summer, Thanksgiving, and Christmas—airlines generally discount business-class seats by up to 80 percent.