Source: Airports Council International.
Like its North American counterpart the European air transport system shows a level of divergence between passenger and freight services. The level of airport activity is a function of the distribution of population, with lower incomes related to lower activity levels in Eastern Europe. The main airports are usually the hubs of national carriers such as British Airways (LHR), Air France (CDG), Lufthansa (FRA), KLM (AMS), or Iberia (MAD). Parts of the Mediterranean are overrepresented as the traffic intensity is mainly related to resort areas such as the Canary Islands and the Balearic Islands.
The major freight airports are usually similar to the main passenger airports, but such as in the United States, specialized freight airports, including Liege and Leipzig, have emerged. The majority of the freight activity takes place within a rectangle defined by London (LHR), Amsterdam (AMS), Frankfurt (FRA), and Paris (CDG). Little freight activity takes place around the Mediterranean.