http://www.unitedairlines.de/core/english/index.html

Also, United worldwide web sites: http://www.united.com/page/article/0...ldwideservices

If buying a ticket for somebody else, when you are not traveling with the other party, expedia or any other outlet is the better route with United anyway.
http://www.flyertalk.com/forum/unite...ted-check.html

And even that is not expat specific, though being where you are makes it even more difficult.

-David