The formula shows that booking the ticket eight weeks in advance is the best option for holidaymakers.

公式显示，提前8周购买机票是最佳选项。

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The ticket had a strict no-transfer policy, but since passport information was not required when booking, any Canadian Elizabeth Gallagher can use it.

票有严格的不可转让的政策，但由于预订时不需要护照信息，加拿大任何叫伊丽莎白·加拉格尔的人都可以使用它。

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As Gillian also heard in compiling the Business Scotland programme, there are significant success stories in the sector - the rapid growth of Skyscanner, based in central Edinburgh and using some very smart software to eat up share of the vast online airline ticket booking market.

BBC: Stuck on the runway

The Old Vic said it had added text to the bottom of the page on its website which highlighted the booking fees, but added that the fee was applied per transaction rather than per ticket.

BBC: Box Office sign

Mr Clarke's solution: customers booking a flight should be told more than the ticket price and the type of plane used on a route.

BBC: smokestack in Beijing