Vinh ( listen) is the biggest city and economic and cultural center of the North Central Coast of Vietnam. Vinh is the capital of Nghệ An Province, and is a key point in the East-West economic corridor linking Myanmar, Thailand, Laos and Vietnam. The city is situated in the southeast of the province, alongside the Lam River (Song Lam) and is located on the main north-south transportation route of Vietnam, easily accessible by highway, railroad, boat and air. The recently expanded Vinh International Airport is served daily by three carriers: Vietnam Airlines, VietJet Air, and Jetstar Pacific. On September 5, 2008, it was upgraded from Grade-II city to Grade-I city, the fifth Grade-I city of Vietnam after Hai Phong, Đà Nẵng and Huế. Vinh is the most populous city in the North Central Coastal region, with over 490,000 residents (2015 estimate). The city is bordered by Nghi Loc district to the north and east, Hung Nguyen district to the west, and Nghi Xuan district in Ha Tinh Province to the south. Vinh is about 300 kilometres (190 mi) south of Hanoi and 1,400 kilometres (870 mi) north of Ho Chi Minh City.