This paper presents results from a study about the Internet as an information source for travel planning based on interviews with travelers in 13 countries in 2005. In 1997, a similar large scale survey was carried out in 15 European countries. The study shows a dramatic but well known change in information sources used by travelers since 1997. The Internet has become the most preferred information source by approximately 50% of the travelers. Travelers using the Internet as their primary source of information mostly combine it with other sources such as friends and relatives, brochures, guidebooks, and travel agents. A logistic regression analysis was performed in order to study the significance of demographics and countries on the preference of Internet as the first information source.