According to VnExpress sources, the couple landed at Da Nang International Airport on the private aircraft manufactured by the American company Gulfstream Aerospace Corporation.
The jet has a maximum capacity of 17 sitting passengers or 6-8 sleeping passengers.
Tables and chairs can be customized to serve any kind of meeting, party or function.
The plane also boasts Ka-band wifi and fast global internet.
Launched in 2014, the Gulfstream G650ER is one of the world's fastest and largest commercial aircraft with prices starting at $70 million.
Bill Gates's private jet parks at Da Nang International Airport on March 5.
The American billionaire is on a personal holiday to Da Nang and Hoi An for about 5 days.
He is staying at a 5-star resort in Son Tra District and expected to be touring the neighboring historic town of Hoi An on Tuesday.
Photo by Nguyen Dong