Computers used for check-in procedures at Hanoi's Noi Bai Airport broke down Saturday, leading to the delay of 12 domestic and international flights.
Thousands of people were trapped at the airport between 7 a.m. and 9 a.m. when the error was fixed.
Computers belonging to Vietnam's national carrier Vietnam Airlines were the only machines affected.
Some flights were delayed for nearly two hours. A domino effect was created as many passengers on later flights had to give check-in priority to victims of the technical error.
The long wait caused chaos at the airport as people jostled to finish their check-in.
They were traveling to Ho Chi Minh City, central Vietnam and other Asian destinations such as Luang Prabang in Laos, Siem Riep, Bangkok and Shanghai.
Le Manh Hung, general director of the Civil Aviation Authority of Vietnam, told Tuoi Tre "The broken computers were from Vietnam Airlines. The computer system of the airport was unaffected."
No details on the causes of the error have been released.