Visas

All individuals traveling from outside of the United States must apply for a visa as soon as possible and at least four to five months prior to their date of travel.

• The most up-to-date information about traveling to the U.S. can be found at the U.S. State Department website.
• Scientists visiting the U.S. may find helpful information at the National Academies of Sciences website.
• Find visa appointment wait times here.

Please do not wait until you receive your registration confirmation before applying for a visa. We encourage you to apply for your visa right away if you are considering attending to avoid delays and longer than anticipated wait times.

All visitors traveling to the U.S. from visa waiver countries must meet all requirements of the program. Find more information on the Electronic System for Travel Authorization (ESTA) and a list of visa waiver countries.