hlín debuted for iceland u17 on april 23, 2015 at 14 years old in a match against wales. she participated in all the six matches iceland u17 played in the 2017 uefa women's under-17 championship qualification. on august 25, 2016, hlín debuted for iceland u19 in a match against poland. on january 23, 2018 hlín debuted for iceland senior team in a friendly match against norway. hlín scored her first international goal against denmark in the 2018 algarve cup.