Abreu (Viagens Abreu) is the world's oldest travel agency, founded in Porto, Portugal, in 1840 by Bernardo Abreu, still family-owned and a major global travel group offering leisure, business, and event management, with deep roots in Portuguese-Brazilian travel and extensive international operations. They provide services from flights, hotels, and cruises to corporate travel, incentive programs, and destination management, emphasizing personalized service and technological tools.