A youth product of Monaco, L'Hostis gained first-team playing time on loan at Martigues for the 2011–12 season.[1] He then spent two years as first-choice goalkeeper at Amiens, before joining Clermont in July 2014.[2] He made his full professional debut a few weeks later, in a 2–1 Ligue 2 defeat against Brest.[3]
L'Hostis signed for Le Puy in the summer of 2017, and played there for three seasons, before moving to Orléans in June 2020.[4] In 2022, he signed for Bourg-en-Bresse.[5]