1, course has many airline to manage, because have,compete, airline ticket is hit fold opportunity more.
2, buy identical airline to go back and forth between couplet Cheng airline ticket to more the opportunity obtains a discount.
3, mix the earliest because the latest airliner is no-go, hit the opportunity more that fold.
4, of airline ticket sell the flight that conduces to airline plans ahead of schedule, discount possibility is consequently bit more.
5, discount airline ticket has more limitation, do not get an autograph to turn for example, change the date, return a ticket, the journey and time should notice before buying.
6, amount of special offer airline ticket is limited, please in advance is ordered.