During the 1970s, Grønlandsfly upgraded its DC-4 to the newer DC-6, but principally focused on expanding its helicopter fleet, purchasing five more S-61s.
Durante os anos 70 Grønlandsfly actualizou os seus DC-4 cara os novos DC-6, pero centrouse principalmente en expandir a súa frota de helicópteros, mercando cinco S-61 máis.