Friess started out the season competing at the French Championships. She competed on just three events, Vault, Uneven Bars, and Floor. In July, she was a part of the French team that competed at the Pieve di Soligo Friendly in Italy. She finished 16th overall individually, while the French team placed 2nd. Aline Friess was chosen as the alternate for the 2018 European Women's Artistic Gymnastics Championships. After teammate Julia Forestier had to withdraw due to an injury, Friess was put on the team. She participated in qualifications and the team final on uneven bars with a score of 12.900 and balance beam with a score of 10.933, helping the team to a 5th-place finish. In November, she competed at Elite Gym Massilia where she finished 12th in the all-around and qualified for the vault and balance beam finals. She finished 4th on vault and earned a bronze medal on balance beam.