Australians will have to pay more the next time they book their flight tickets as airlines are going to pass the steeply rising fuel costs on to customers soon, Qantas CEO has warned. During his speech at the Australian Financial Review Business Summit in Sydney on March 8, Alan Joyce, the chief executive of Qantas, said that airfares would go up by seven percent if oil prices were staying at US$120 a barrel. Although the seven percent increase was not massive compared to the 30 percent rise in petrol prices, it would have an impact considering the levels of travel out there, he said. In addition, Joyce mentioned that if oil prices surpassed the US$120 level, airline ticket prices would rise by one percent per US$4 increase in fuel costs. “Now, unfortunately, if they stay at these levels, airfares are going to have to go up, and we’re going to …