The Airports Corporation of Vietnam (ACV), which operates all of Vietnam's commercial airports, put forward the proposal for the renovations, including underground tunnels linking T1 to the parking facility and the airport's other domestic terminal Terminal 3.

Long Thanh International Airport, which lies 40 km away in Dong Nai City, is expected to begin operations later this year, prompting plans to redistribute passenger traffic between the two airports.

Tan Son Nhat currently has three terminals. Domestic Terminal 1 and international Terminal 2 stand next to each other and share the main entrance on Truong Son Street in Tan Son Hoa Ward. Terminal 3 stands about one kilometer away and has been operating for more than a year.

T1, which covers nearly 41,000 square meters and has a designed annual capacity of about 15 million passengers, or around 41,000 passengers a day, is now used primarily by Vietjet Air. Vietnam Airlines, Sun PhuQuoc Airways, Pacific Airlines, Vasco, Bamboo Airways, and several other carriers have moved their domestic operations to T3.

Passengers cross a road in front of the T1 terminal of Tan Son Nhat airport in Ho Chi Minh City. Photo by VnExpress/Giang Anh