研究:提前8星期订机票最省钱

　　The formula shows that booking the ticket eight weeks in advance is the best option for holidaymakers. Booking more than eight weeks ahead could mean you risk having to pay to alter your booking if your plans change. However, if you book it later, there's an increased risk that prices will go up or the flight could be fully booked.　　

　　公式显示，提前8周购买机票是最佳选项。如果提前8周以上的话，这就意味着你改变原定计划的风险加大。而如果在更短时间内预定的话，则意味着机票价格居高不下的几率上升，并可能面临更大的风险，那就是机票已经预定完了，没你的份了。