TRINITY International School of Tourism Management has an affiliation with Southern New Hampshire University, Manchester, New Hampshire, USA that allows for students to study abroad at each respective institution. Southern New Hampshire University's School of Hospitality, Tourism and Culinary Management is northern New England's largest hospitality educator and offers associate degrees in culinary and baking arts, baccalaureate degrees in six hospitality and tourism management majors, and a master's degree in hospitality administration. The school is housed in a 30,000 square foot Hospitality Center on the university's campus located one hour north of Boston.

"In order to promote cooperation between the San Diego State University and TRINITY International School of Tourism Management, and desiring to expand scholarly ties, facilitate academic cooperation and promote mutual understanding, both partners agree to explore the feasibility of establishing a framework for educational and cultural cooperation".

The European Federation of Associations of Professional Congress Organizers (EFAPCO) and TRINITY International School of Tourism Management, in their desire to advance the cause of Professional Tourism, have established close and continuous cooperation in designing the course content for the Department of Convention, Event and Exhibition Management and are involved in conducting joint research in this field. TRINITY's programs in Convention, Event and Exhibition Management are fully endorsed by EFAPCO.