Customs officers at Ho Chi Minh City's Tan Son Nhat Airport found a Vietnamese female passenger hid more than 300 grams of heroin under her clothes last Saturday.
The Jetstar Pacific BL790 flight bound for Hanoi was canceled after scanners found the heroin.
The police identified the woman as Diep Ngoc Tu from the central province of Phu Yen, but they did not reveal further details, saying they were investigating the case further.
Last January, officers at Hanoi's Noi Bai International Airport arrested a Vietnamese female passenger with 4.3 kilograms of heroin hidden in her hand luggage on a flight bound for Singapore.
Under Vietnamese laws, possession, transport, or trade of more than 100 grams of heroin or cocaine can be punished with death.