The airport had 70,000 passengers during its first twelve months of operations and exceeded 100,000 the following year. The temporary terminal was too small for this traffic and already during construction there was designed a larger terminal by Halfdan Grieg. By 1956 it was determined that the new terminal building would be too small. Also an expansion of the runway was discussed that year. SAS announced that they would take delivery of the intercontinental jetliner Douglas DC-8, which would require a longer runway than was available at both Flesland and Fornebu. The cost of extending the runway to would cost NOK 3.5 million in Bergen and NOK 30 million in Oslo.