This paper investigates: (1) if, and to what extent, self-congruity theory is applicable in tourism, (2) to what extent travel and person characteristics explain the degree of self-congruity, and (3) how the operationalization of self-congruity affects the conclusions about whether self-congruity holds in tourism. Results derived from a large-scale study of Swiss travellers indicate that conclusions depend heavily on how self-congruity is measured. Using a relatively strict measure, more than half the trips under study can be classified as self-congruent. However, travel and socio-demographic characteristics are very limited in their ability to explain when self-congruity occurs. (2) to what extent travel and person characteristics explain the degree of selfcongruity, and (3) how the operationalization of self-congruity affects the conclusions about whether self-congruity holds in tourism. Results derived from a large-scale study of Swiss travellers indicate that conclusions depend heavily on how self-congruity is measured. Using a relatively strict measure, more than half the trips under study can be classified as selfcongruent. However, travel and socio-demographic characteristics are very limited in their ability to explain when self-congruity occurs.