Singapore Airlines(SIA) is working with travel agents in Australia to recover the difference in fares on business-class tickets that were mistakenly sold there at economy-seat prices.
Tickets that were snapped up were being sold for as little as $3,500, instead of $6,000.
Australian newspapers reported that the mistake has led to a dispute between the airline and travel agents around the country over who should foot the bill for the error.
The tickets were sold in Australia, a spokesman for the airline told The Straits Times.
The fare issue was discovered last weekend and action was to taken to rectify the issue immediately.
Singapore Airlines loaded business-class fares for flights between Australia and London into a global booking system that travel agents use to sell tickets to their customers, reported Sydney Morning Herald on Thursday.
The cost of business-class tickets that should have sold for up to $6000 a piece for flights from Dec 8 was loaded into the global distribution system, or GDS as it is known in the travel trade, for as little as $3500, said the newspaper.
SIA has advised travel agents of options for affected customers. The options include paying the difference to the airline's lowest business class fare, flying on economy class or getting a full refund.
"We are working with our travel agent partners to ensure that our customers are notified of this issue, to ensure there is no disruption to their travel plans," the spokesman for the airline said.