> For the complete documentation index, see [llms.txt](https://resources.atriptech.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://resources.atriptech.com/bang-zhu-zhong-xin/re-men-fen-lei/shou-hou-piao-wu/gai-qi/gai-qi-shen-qing-de-ti-jiao-shi-xian-shi-duo-jiu.md).

# 改期申请的提交时限是多久？

**改期申请需要同时满足以下条件：**

1、在航班起飞前至少48小时提交；

2、在航司规定的改期提交有效期内。