Nội Bài International Airport in Hanoi, the capital of Vietnam, is the country’s second largest and busiest international airport for passenger traffic, after Tan Son Nhat International Airport in Ho Chi Minh City. It is currently the main airport serving Hanoi, replacing the role of Gia Lam Airport. The airport consists of two passenger terminals and a cargo terminal. Terminal 1 serves domestic flights, and Terminal 2 serves all international flights to and from Hanoi. The airport is currently the main hub of the flag carrier Vietnam Airlines, travel carrier Vietravel Airlines, and an operating base of budget carriers Bamboo Airways, Pacific Airlines and VietJet Air.

Hanoi is the capital and second-most populous city of Vietnam. As evident by the literal translation of its name – 'inside the river' – portions of Hanoi's border are delineated by the Red and Black Rivers. As a municipality, Hanoi consists of 12 urban districts, 17 rural districts, and one district-level town. It has an area of 3,359.84 km2 (1,297.24 sq mi) and a population of 8,435,700 in 2022. In 2022, Hanoi has the second-highest gross regional domestic product of all Vietnam provinces and municipalities at 51.4 billion USD, behind Ho Chi Minh City. Hanoi Capital is also ASEAN 8th largest economy after Surabaya.