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The period of efficacy of airline ticket of domestic flight number is how long,
From;    Author:Stand originally

1, if airline ticket of domestic flight number is OK ticket, sign good bill namely, the label can change in a year of time. If be OPEN ticket, a few tickets that did not confirm a seat namely (the ticket that be not OK) , the sun from make out an invoice rises to affirm date is restricted for a year, after confirming date, namely OK later, still have time limit of a year changing a label.
2, the time that can change a label, the regulation of domestic airline all not identical, but it is the least. At present major airline has such regulation: Want to be able to provide a place at that time only, and in less than of effective time limit, all can change a label.