We encourage conference attendees from outside the United States to begin their visa applications early. The processing time can be significant and varies from country to country.
Please visit the U.S. Visas website for the most accurate and current information.
Do you need an invitation letter?
If you would like an invitation letter, please contact a conference chair.
Electronic System for Travel Authorization (ESTA)
ESTA is now mandatory for Visa Waiver Program (VWP) travelers who are nationals of the Czech Republic, Estonia, Hungary, Latvia, Lithuania, Malta, the Republic of Korea, and the Slovak Republic. Effective January 12, 2009, all VWP travelers are required to obtain an authorization via ESTA before traveling to the United States. Learn more about ESTA on the DHS Customs and Border Protection (CBP) website.