Looks like the first part of this trip is set:
http://www.jpost.com/DiplomacyAndPolitics/Article.aspx?id=277050Romney will fly to the UK for the opening ceremonies of the Olympics on July 27. Looks like he'll fly to Israel on July 29, and leave on the 31st. Once he leaves Israel, he may or may not stop in Germany and/or Poland before returning to the US. That part hasn't been announced yet.
Oh, and when he's in Israel, one of the things he'll do is hold a $60,000 a plate fundraising dinner with American expatriates.