 In late 1998 and early 1999 , KLM and Braathens introduced direct flights from Sandefjord and Kristiansand to Amsterdam . Braathens also started flights from Sandefjord to Stavanger and Bergen . On 1 May 1999 , Northwest Airlines started flights to its hub at Minneapolis @-@ Saint Paul International Airport in the United States . This service was terminated in October . The Northwest service had a connection to Stockholm as well as a new route from Oslo to Gothenburg , operated by Braathens . After Northwest announced the withdrawal of their service , the Gothenburg service was also terminated . 
