An autism diagnosis in adulthood can increase women's self-compassion and inform appropriate supports. This study explored what helped and hindered autistic women when accessing an adulthood autism diagnosis in Australia. Ten autistic women diagnosed as adults within the past 5 years participated in a semi-structured interview about their experiences of accessing a diagnosis. Framework analysis was used to identify barriers and facilitators on person, provider and system levels. Person-level factors included women's recognition of their autism, motivation, preparation, social support and approach during the assessment. Provider-level factors related to providers' level of knowledge and skill in working with autistic women, as well as the women's experience of being dismissed or misdiagnosed. Interactions between person- and provider-level factors highlighted that the diagnostic process is relational. System-level factors included the requirements of the diagnostic process (time, financial costs, and technology) and the nature of diagnostic criteria and assessment tools used. These factors provided the context in which person-level and provider-level factors operated. The experiences of participants highlight improvements that could be made to accessing an adulthood autism diagnosis for women in Australia, including provider knowledge of the heterogeneity of autism and the development of resources to help autistic women prepare for their diagnostic assessment.