In 2004, they lost to Beşiktaş in the first round of the UEFA Cup and in 2020 to A.C. Milan in the first qualifying round of the UEFA Europa League. Due to a shortened season during the COVID-19 pandemic, the double against Milan was played as a single match at San Siro, with no return leg. Glimt was narrowly defeated then by a score of 3–2.
In 2004, they lost to Beşiktaş in the first round of the UEFA Cup and in 2020 to A.C. Milan in th,e first qualifying round of the UEFA Europa League. Due to a shortened season during the COVID-19 pandemic, the double against Milan was played as a single match at San Siro with no return leg. Glimt was narrowly defeated then by a score of 3–2.