Techo International Airport — Phnom Penh (Boeng Khyang), Cambodia

KTI represents one of Southeast Asia's most ambitious recent airport projects, built on a large greenfield site south of Phnom Penh to eventually replace the older, more centrally located Phnom Penh International Airport. Cambodian authorities designed the new facility with room for substantial future growth, aiming to accommodate rapidly rising visitor numbers tied to tourism at Angkor Wat and other heritage sites, as well as the country's expanding manufacturing and export economy. The scale of the development, including its terminal footprint and planned long-term capacity, positioned it among the larger airport construction projects undertaken anywhere in the region in recent years. For a capital city whose previous airport had become increasingly hemmed in by urban growth, KTI offered room to expand runways, cargo facilities, and terminal space without the same geographic constraints. Its opening marked a significant shift in how travelers reach Phnom Penh, moving international arrivals toward this new southern hub.