Border control is the implementation of border controls on travel between Svalbard, which maintains a policy of free migration as a result of the Svalbard Treaty (Norwegian: Svalbard-traktaten; ) and the Schengen Area, which includes the rest of Norway. The Kingdom of Denmark also maintains a complex system of subnational countries with autonomous customs policies, since they aren’t within the European Union like the Danish mainland. These are Greenland () and the Faroe Islands (). These areas do not maintain strict immigration controls with the Schengen Area, but border controls are sporadically enforced for customs purposes. Other examples of effective internal border
Air Greenland need to make more than one flight for each connection to a fixed-wing flight because of passenger capacity, causing longer total travel time. Air Greenland also performs charter flights within Europe on behalf of European travel agencies using its Airbus A330. In 2015, the decision voted by Greenland's governments to extend the runways of Nuuk and Ilulissat airports directly threatened the purpose of Air Greenland's single widebody aircraft. The A330 was only used from Pituffik and Kangerlussuaq to Copenhagen Kastrup, but in January 2017, Air Greenland had announced more commercial routes to be covered by the aircraft between Iceland and