A sampling of some well-recommended tour operators follows, but you should always consult a good travel agent for the latest offerings.
British Airways Holidays (tel. 800/AIRWAYS; www.britishairways.com) offers a far-flung and reliable touring experience. Trips usually combine Vienna and other Austrian attractions with major sights in Germany and Switzerland. BA can arrange a stopover in London en route for an additional fee and allow extra time in Vienna before or after the beginning of any tour for no additional charge.
Other attractive options are North America's tour-industry giants. They include Delta Vacations (tel. 800/221-6666; www.deltavacations.com), American Express Travel (tel. 800/297-2977; www.americanexpress.com), and an unusual, upscale (and very expensive) tour operator, Abercrombie and Kent (tel. 800/554-7016; www.abercrombiekent.com), long known for its carriage-trade rail excursions through eastern Europe and the Swiss and Austrian Alps.
