Singapore Airlines (SIA) said Monday it would honour hundreds of business-class tickets sold wrongly at economy fares to ensure travellers' plans are not disrupted.
The airline said in a statement it was investigating the cause of the erroneous sales which saw "business-class booking able to be made at an outdated economy-class fare level".
The tickets involved 900 ticketed segments -- or journeys between two airports -- sold by Australian travel agents.
Australian news reports said they involved flights between Singapore and European destinations.
"To ensure no disruption to our customers' travel plans, Singapore Airlines wishes to advise that it will honour all affected bookings," SIA said, without giving a figure for the number of passengers affected.
Singapore's Straits Times said in an online report Monday customers who had purchased the tickets would be flying business class "for tickets that were as much as US$4,200 cheaper than what they should have been".
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