The aircraft was brought to Noi Bai International Airport in Hanoi on Friday from Seattle Airport.
This aircraft is the first of eight 787-10s Vietnam Airlines will operate.
Boeing 787-10 in Charleston, the US's State of South Carolina (photo by Boeing)
Boeing 787-10 can transport passengers the most with 24 business-class seats and 343 economy-class seats.
The aircraft will be used for the major route of Hanoi-HCM City and key international routes.
At present, Vietnam Airlines has a fleet of 61 narrow-body and 33 wide-body aircraft.
In 2018, the airline carried 21.9 million passengers, 44% of all capacity on Vietnamese carriers. The firm targets 13.7% growth this year.