Cathay Pacific ticket error: Airline to honour first and business class fares sold cheap by mistake

Cathay Pacific business class. The airline says it will honour the premium tickets it accidentally sold too cheaply.

Cathay Pacific Airways made a mistake selling first- and business-class tickets at a steep discount.

Now, the lucky few who made the bookings will travel in style after all.

The Hong Kong-based airline said on its Twitter and Facebook pages on Wednesday that it would still welcome passengers that bought the business-class tickets from Vietnam to Canada and the US at economy prices earlier this week.

The online ticketing foul-up meant return fares of as low as $US675 ($965) from Da Nang in Vietnam to New York at the front end of the plane, or a small fraction of its original price.

"We do not want to go back on our promise to our customers," Cathay said on its Twitter account.

"We made a mistake but we look forward to welcoming you on board with your ticket issued."

While the passengers were kept happy, the mistake adds to the embarrassments for the carrier that's struggling to turn its fortunes around while competition intensifies from Chinese and budget airlines.

The pricing gaffe comes on the heels of a sophisticated hack on Cathay's computer systems last year that exposed private information of 9.4 million passengers in the world's biggest airline data breach.

Gary Leff, a travel and loyalty-program blogger on View from the Wing, wrote on December 31 that the Cathay business-class round-trip from Da Nang to New York started at $US675 for travel in August.

On Wednesday, the same journey cost about $US16,000 ($22,900) for July and September, according to the airline's website.

Prices weren't available for August.

Travel from Hanoi to Vancouver and back in a mix of business and first class could cost less than $US1000, according to a post on One Mile at a Time.

Other airlines have made similar pricing errors.

Singapore Airlines in 2014 and Hong Kong Airlines last year honoured business-class tickets mistakenly sold at economy fares.

The carriers didn't disclose how many people bought the cheaper tickets.

Cathay had sold tickets to the US and other destinations from Vietnam in a promotional offer that ended on December 31, according to its website.

Round trip business tickets to Los Angeles were sold from $US2940.

Bloomberg