Allaire-Bourgie competed at Elite Canada amongst senior level gymnasts, even though she was still a junior. She placed third in the all-around behind Ana Padurariu and Ellie Black and placed third on uneven bars once again behind Padurariu and Black. She also placed fourth on balance beam behind Padurariu, Black, and Laurie-Lou Vézina, and placed sixth on floor exercise. In March she competed at the 2019 L'International Gymnix. She helped Canada win the bronze medal behind the United States and Belgium. Individually Allaire-Bourgie won gold in the all-around ahead of American Olivia Greaves. During event finals she placed fourth on vault, second on uneven bars behind American Skye Blakely, second on balance beam behind Noémie Louon, and won gold on floor exercise. In May Allaire-Bourgie competed at the Canadian National Championships, once again amongst the senior gymnasts. After the first day of competition she was in fourth place in the all-around behind Padurariu, Black, and Brooklyn Moors. On the second day, Allaire-Bourgie withdrew from the competition after injuring her ACL. As a result of the injury, Allaire-Bourgie was unable to compete at the inaugural Junior World Championships.