Copenhagen Kastrup Airport — Copenhagen, Denmark

Copenhagen Kastrup Airport, known worldwide by its three-letter code CPH, ranks among the busiest air hubs in Northern Europe and serves as the principal gateway to Denmark and much of Scandinavia. Built on reclaimed land on the island of Amager just southeast of the capital, the airport has operated continuously since the 1920s, making it one of the oldest international airports still functioning on its original site. Three runways handle a dense mix of long-haul, European, and domestic traffic, while SAS uses the field as its main operating base. A direct rail and metro connection whisks arriving passengers into central Copenhagen in a matter of minutes, and a rail link extends the airport's reach across the strait into Malmö and southern Sweden. Duty-free shopping, efficient transfers, and Scandinavian design touches throughout the terminals have earned the facility a reputation as one of the more pleasant hubs for connecting travelers in Europe.