Qantas has again left customers frustrated after an elderly couple celebrating a birthday were made to sit separately due to the carrier overbooking the flight.

Travel agent and daughter of the elderly couple, Maree Sinclair, says her parents had booked business class months ago and when they arrived at the airport, they were told one of them would have to sit in premium economy.

“[Qantas] they made up a story saying ‘if everyone turns up, one of them will have to be flying in premium economy,'” she told Tom Elliott.

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