NEW Carry-on policy:
In the light of recent events, there is a new policy in effect regarding prohibited items on an airplane. Read the press release from the Department of Homeland Security.

Official documents:
We are not responsible for information regarding documentation necessary for your travel. Please consult with the appropriate consulate. We also suggest reading more about entry and visas requirements on Department of State’s Travel webpage.
http://travel.state.gov/foreignentryreqs.html

Passports:
We recommend that you have passports for all passengers (including ALL children) and that they are valid for at least six months after your departure date. US citizens are required to have passports for traveling to Europe, although not all countries may require visas for short visits (length of visit varies).

Reconfirm your flights:
We recommend that you reconfirm your flights with the airlines 48 hours prior to your departure and return dates. This will ensure that you are aware of any airline schedule changes that would possibly compromise your travel plans.