Turku Airport — Turku, Finland

Turku Airport, identified by the code TKU, serves Finland's oldest city and former capital, a historic center on the country's southwestern coast that once served as the seat of Finnish governance before Helsinki assumed that role in the nineteenth century. Turku's identity remains closely tied to its medieval castle and cathedral, its university institutions, and its position as a shipbuilding center that has produced some of the largest cruise ships in the world at the nearby Meyer Turku shipyard. TKU handles both domestic connections to Helsinki and a range of international routes, historically including strong links to Stockholm given Turku's proximity to Sweden across the Archipelago Sea, a maze of thousands of islands stretching toward the Åland Islands. The airport also plays a role in general aviation and flight training in the region. Seasonal variation affects TKU's traffic patterns, with increased activity in summer months when the archipelago draws boating tourists and seasonal residents to the coast.