Samui International Airport — Na Thon (Ko Samui Island), Thailand

Samui International Airport, identified by the code USM, occupies a distinctive place among the world's airports for its open-air terminals built without jet bridges, designed to blend into the tropical landscape of Na Thon on Ko Samui Island in the Gulf of Thailand. Privately owned and operated by Bangkok Airways, which built it in the late 1980s, the airport has long been the carrier's flagship project despite competitors later gaining access to the island. Passengers walk between low timber-roofed pavilions surrounded by gardens, palm trees, and lounges rather than moving through the enclosed corridors typical of larger hubs. USM primarily serves leisure travelers heading to Koh Samui's beaches and resorts, with direct connections to Bangkok, Phuket, and a handful of international points, particularly during the high season when demand for the island's tourism industry peaks.