Airports of London cannot be expanded due to the docks on either side. It is also the only airport serving London which does not operate at night. A light rail service from London City Airport DLR station, which adjoins the terminal building of London City Airport, links it to the financial district of the City of London at Bank and Monument stations, which offer interchanges with London Underground. Located in the London Borough of Hillingdon, Heathrow is by far the largest of London's airports and considered the main gateway into the United Kingdom for non-European visitors. Heathrow has four terminals and two parallel
National Airports System islands of Saint Pierre and Miquelon (an Overseas collectivity of France) cooperate with Canada on air travel via several major Canadian airports. The following list contains the 26 NAS airports effective 17 April 2010, along with their IATA codes and passenger numbers for 2014: National Airports System Canada's National Airport System (NAS) was defined in the National Airports Policy published in 1994. It was intended to include all airports with an annual traffic of 200,000 passengers or more, as well as airports serving the national, provincial and territorial capitals. All airports, with the exception of the three territorial capitals, in