passengers in 1980, increasing to 477,549 five years later. Kristiansand-based Agderfly introduced services to Göteborg Landvetter Airport on 26 September 1989, followed by a Billund Airport route on 2 October. Two years later they received permission to fly to Bremen Airport, but ultimately shut down on 21 November 1991. The flight school continued to operate. SAS was reorganized in 1990 and the Copenhagen routes were taken over by SAS Commuter's Eurolink service with new Fokker 50 aircraft. Norsk Air introduced a service from Sandefjord Airport, Torp via Kristiansand to London Stansted Airport on 28 October 1991. The route had insufficient traffic and was terminated the following year. The airport served 578,373 passengers in 1990, which increased to 745,061 passengers five years later. Busy Bee went bankrupt in 1992 and their routes to Stavanger and Bergen were taken over by Norwegian Air Shuttle. Following SAS terminating the Copenhagen service on 26 March 1994, Maersk Air introduced three daily flights to Copenhagen. That year the terminal was rebuilt and expanded with another . Most of this was expansion of the public areas, including a new baggage area. SAS commenced domestic services from Kjevik on 8 October 1998 when Oslo Airport, Gardermoen opened. This waived the need for landing slots which had limited capacity at Fornebu, allowing for free competition on the route. KLM returned to Kristiansand on 28 March 1999, introducing flights to Amsterdam using a Fokker 50 three times per day. By 2000 Maersk Air had replaced its F50s with jet aircraft on the Copenhagen route. The airport's patronage peaked at 902,295 in 1999, after which the ridership fell and did not recoup until 2011. Following the SAS Group purchase of Braathens in 2002, SAS closed its Kristiansand to Oslo route on 2 April. Also as a result of the merger, SAS Commuter took over Norwegian's routes to Stavanger and Bergen on 1 April 2003. The same year SAS resumed its route to Copenhagen, matching Maersk Air with three daily flights. The following year Maersk Air introduced flights to Billund Airport in Denmark. The airline ceased operations the following year. Braathens merged into SAS Braathens in 2004, and resumed as Scandinavian Airlines from 2007. Norwegian returned to Kjevik in 2007 as a low-cost carrier with three weekly flights to London Stansted Airport. However, the route proved to have too little patronage and was closed within the year. However, they introduced three