Passage: Reykjavík Airport, the second largest airport in the country (after Keflavík International Airport), is positioned inside the city, just south of the city centre. It is mainly used for domestic flights, as well as flights to Greenland and the Faroe Islands. Since 1962, there has been some controversy regarding the location of the airport, since it takes up a lot of valuable space in central Reykjavík.

Question: What kind of flights are Reykjavik Airport used for mainly?
domestic flights