Background and aims: Children and young people on the autism spectrum frequently report a range of negative educational experiences and face disproportionally high rates of school non-attendance, including school avoidance and permanent exclusion, which can have a significant impact on their well-being as well as educational and broader life outcomes. To date, few studies have examined the full range of proximal (child, parent/family, school levels) and distal (community and society levels) barriers to ensuring the school attendance and the inclusion of autistic pupils. The current study sought to do just that by examining autistic young peoples' school non-attendance and exclusion experiences from the perspectives of multiple informants. Methods: We recruited 12 autistic pupils, who had previously experienced school avoidance and/or exclusion, from one local authority in England, United Kingdom. We conducted semi-structured interviews with the young people themselves, ten of their parents, eight of their current teachers and nine local authority professionals, including six educational psychologists and three specialist autism teachers. We analyzed interviewees' responses using reflexive thematic analysis. Results: Interviewees gave overwhelmingly negative accounts of autistic pupils' school non-attendance and exclusion experiences. Our analysis identified a range of school-related factors they felt led to, or exacerbated, negative experiences in their former mainstream schools, and which ultimately led to their or their children's school non-attendance. It also went further to identify distal factors, including fragmented educational experiences, parents "fighting" against a complex bureaucratic system to secure appropriate education for their children, and limited professional involvement. Conclusions: Our findings emphasize the importance of examining the broader context in which autistic pupils are embedded and demonstrate that such pupils are able to successfully attend--and even enjoy--school when they receive the appropriate care and support. Implications: Schools and local authority professionals should seek to work in partnership with parents and autistic pupils to secure the necessary support for their inclusion in mainstream education. Government policy should support the provision of sufficient local authority professionals to adopt a more proactive approach to mitigate autistic pupils' avoidance of and exclusion from school.