In February 2019, Lionsgate and Transmission Films acquired UK and Australian distribution rights to "Ammonite", respectively. In January 2020, Neon acquired US and Canadian distribution rights to the film for $3 million. "Ammonite" was set to world premiere at that year's Cannes Film Festival, prior to its cancellation due to the COVID-19 pandemic. It was also selected to screen at the Telluride Film Festival in Colorado in September of that year, prior to its cancellation also due to the pandemic.