Lengkepan kalimah di handap ieu: Luukkonen maén pikeun Finlandia di U18 jeung U20 World Junior Championships. Manéhna meunang medali emas di U18 World Juniors dina 2016, stepping di salaku starter lamun Leevi Laakso meunang gering jeung medali pérak dina 2017. Manéhna meunang emas deui di
2019 World Junior Ice Hockey Championships dina kameunangan 3<unk>2 ngalawan Team USA sarta dingaranan media's pick for best goaltender of the tournament.