Heavy cargo operations became important in the 1980s, when the airline participated in two major hydroelectric power station projects.

Mørefly was established by Elling Lande, Per Dalen and Kåre Stein Haram on 10 June 1955.

It took various general aviation contracted work, such as cargo transport, aerial photography and searching for herring steams.

[2] The commercial break-through took place in 1957, when an agreement was reached with the Ministry of Social Affairs to carry out air ambulance services in the area between Sunnfjord and Nordmøre.

The service was provided to fishing vessels who could call in cases where they got a line in the propeller or other technical issues.

A Agusta Bell 206 A Jet Ranger was procured in 1968 and was intended for search and rescue and cargo flights.

[10] The main market was charter traffic from the growing petroleum industry, largely across the North Sea to the United Kingdom.

[16] The company also joined the joint venture Commuter Service in 1985, along with the other Norwegian regional airlines Coast Aero Center, Norsk Air and Trønderfly.

The airline applied to the Ministry of Transport and Communications for a concession to operate from Ålesund to Aberdeen Airport in the United Kingdom.

[16] The airline's hangar and office structure was extended to 1,600 square meters (17,000 sq ft) in 1987.

Mørefly bid and won the contracts for a fixed-wing King Air 200 and an Aérospatiale SA365N Dauphin 2 helicopter based av Vigra.

[22] After losing two Westland Sea King search and rescue (SAR) helicopters in 1988 and initiating an upgrade program for the fleet, the 330 Squadron was not able to maintain its operational levels.

The Ministry of Justice therefore signed an agreement with Mørefly to maintain a SAR helicopter at Vigra as a temporary solution.

[24] These were based at Vigra from 1 November 1988 to 31 January 1989 and subsequently at Sandefjord Airport, Torp from 1 February 1989 to 31 December 1990.

Mørefly signed a 350 million Norwegian krone deal with Statoil in 1990 for a five-year contract flying out of Flesland.

As a reaction to entering the offshore market, Helikopter Service bought 44 percent of Mørefly in January 1991, with an option to purchase the remainder.

The effectuated this right in 1992[24] In April 1993 the tender for the air ambulance services were announced, and from 1 January 1994 Mørefly had a much more extensive network.

The new company took Lufttransport's name and was situated in its head offices in Tromsø, although it retained Mørefly's air operator's certificate and organization number.