Dickenmann starred with the Swiss women's under-19 team in both the 2002 and 2004 UEFA Women's Under-19 Championship. In both editions, the Swiss failed to get out of the group stage. On 14 August 2002, at the age 16, she made her international debut in a match against France. Switzerland lost the match 2–1, but Dickenmann was responsible for the Swiss's only goal scoring it in the 33rd minute. Since her debut, Dickenmann has been a regular in the squad appearing in teams that attempted to qualify for UEFA Women's Euro 2005, the 2007 FIFA Women's World Cup, and UEFA Women's Euro 2009; all of which the Swiss have failed to qualify for. Dickenman and Switzerland also missed out on qualification for the 2011 FIFA Women's World Cup. She scored her first goal of the qualification process in a 2–0 victory over the Republic of Ireland converting a penalty.