| Business and marketing is now entering an era of broader orientation by engaging the services. This is supported by various multinational companies that have been oriented in the production of services. Express delivery service delivery is one in service industry that grown significantly in Indonesia. When Indonesia decided to become part of the Asean Free Trade Area (AFTA) then it’s grows fiercing competition among express company in Indonesia to attract their customers to be more loyal to the company. This study aims to determine the effect of marketing activities of PT Citosarana Jasapratama to its customers loyalty in Jakarta. Author conducted the study by distributing questionnaires to 100 PT Citosarana Jasapratama customers from October 2010 to April 2011 to determine the of marketing activitites. Author chose nonprobabilitas samples by using the sampling area. The variables studied were trust, commitment and attraction. This research resulted that marketing activities have a positive influence on customer loyalty. Trust variable indicates that customers still believe in the company and the company has an attraction that can make its customers to reuse its services, however the company is still considered less committed to serving their customers. |