The majority of autistic students experience numerous difficulties at school, which may contribute to frequent moves between mainstream schools. Despite this, no studies have examined the reasons why autistic students are making non-essential mainstream school moves. The aim of this study was to explore the experiences which led parents to consider moving their child between mainstream schools and the decision-making processes in choosing whether to stay or leave. Semi-structured interviews were conducted with 10 parents. Thematic analysis generated three major themes: (1) Parents’ increasing concerns around their child’s school placement, (2) Choosing to stay or leave, and (3) Living with the choice to leave. Parents identified that problems leading to consideration of leaving were largely systemic, highlighting the interaction between push (to leave) and pull (to stay) factors which differed in their intensity across time and personal circumstances. The role of school principals, as well as the parents’ feelings of undermined agency and advocacy, also influenced the decision-making process. This study found that parents’ decision-making around moving their child to another mainstream school is a complicated process; however, the results indicate that there are multiple opportunities for intervention from schools and education departments to prevent a move from occurring.