Usually, a business-class return ticket to NY from Da Nang costs $16,000 (Rs. 11L) for travel in July and September.
Air Canada is now involved in a class action lawsuit at home for refusing to honor a similar price mistake in 2015.
SCMP added that several thousand flights between Vietnam and North America were believed to have been sold during the ticketing mistake, which was put down to human error. He says he did the math and found that there was like a 95 percent discount on the ticket. Cathay Pacific later corrected the mistake and the prices were back to normal.
In that case, Hong Kong Airlines misfiled business class fares from Los Angeles and San Francisco to a number of Asian destinations for as little as $US531.
The Hong Kong-based carrier acknowledged the error on its Twitter feed yesterday, stating "we made a mistake but we look forward to welcoming you on board with your ticket issued".
"The airline said that they'd make a decision on Wednesday about whether or not to honor these fares, and sure enough, they have".
The South China Post found 11 people who snapped up 18 first-class and eight business-class tickets.
The error wraps up a challenging few months for Cathay Pacific, which revealed in October a massive data breach that affected 9.4 million passengers.
Cathay Pacific referred The National to its tweet when asked for comment about the discounted fares.
In October a year ago, it also revealed a major data breach affecting 9.4 million passengers that leaked passport numbers, credit card numbers, and email addresses.
The airlines then revealed that the data was at risk since March 2018, and its delay in announcing was heavily criticized.