父母探亲机票

请问有谁有过这方面经验的，

父母来美签证停留半年，到时候再申请延期的话，那么机票怎么定，是先定半年往返的，到时候再改成一年往返的，有效期定半年还是1年有效，看有效期不同，价格差好多啊，如果定单程的会有问题吗（打电话给上海东航的，说是探亲要定来回票）？

所有跟帖： 

• One way is O.K. But you'd better write a note for your parents w -wandahp- ♀ (329 bytes) () 10/11/2012 postreply 11:44:19

• 回复：One way is O.K. But you'd better write a note for your parent -haibao0615- ♀ (272 bytes) () 10/11/2012 postreply 15:59:25

• 回复：回复：One way is O.K. But you'd better write a note for your par -Bodd- ♀ (1052 bytes) () 10/12/2012 postreply 11:09:00

• 回复：回复：回复：One way is O.K. But you'd better write a note for your -haibao0615- ♀ (59 bytes) () 10/12/2012 postreply 16:37:10