- Travel Agencies and Travel Fashions: Travel AgenciesIf people orientation is for you, then get into the business Travel agency industry may be your proverbial cup of tea. As a private retailer providing travel and tourism-related services and often representing airlines, car rentals, cruise lines, hotels, railways and package tours, travel agencies operate also specialize in organizing trips for commercial and professional purposes. Likewise, travel agencies also serve as general sales agents for foreign travel agencies, which otherwise would not have headquarters in the United States. Air travel Accounting for more than 16 percent of the travel industry's output, airline growth has averaged about 5 percent. increased over the last 30 years. That being said, air travel is expected to double over the next 10 to 10 years. 15