By the late 1980s three competitors were established, Lufttransport, Mørefly and Braathens Helikopter, but by 1992 Helikopter Service had bought all three of these.
Vid slutet av 1980-talet verkade tre ytterligare företag på denna marknad: Lufttransport, Mørefly och Braathens Helikopter, men 1992 hade Helikopter Service köpt sina tre konkurrenter.