Travel overseas you mean? On her own, without a maHram? Travel's hard as it is, why add to it?
Marriage is another issue, let's not bundle it within the same post. That said, we in pakistan generally follow fiqh ul Hanafii, which does not obligate a waalii...well if the bride and her father differ, the state steps in as the waalii in lieu of the father in the bride's favour...some technical stuff I don't really know about and can't enlighten you more about.
No marriage can be finished without the Bride's consent Something everyone imagines in their head and then write about it as if it was a fact. Fiqh Hanbali says all sides of the marriage must be okay with it.
