International Visitors

This international visitors information is for non-U.S. citizens/residents traveling to the U.S. If you plan other visits, such as business or vacation trips before or after the workshop, this information may not be appropriate for your plans.



Please note that this information is given in good faith, but regulations may change. The only authoritative sources of information about visas to the U.S. are U.S. Government websites.


U.S Visa Policies

U.S. State Department

Temporary Visitors to U.S.

U.S. Embassies

U.S. - Visit Program of the Department of Homeland Security


Visa Waiver Program

The most common way of visiting the U.S. without a visa is through the Visa Waiver Program (VWP). Currently thirty-six countries participate in the U.S. VWP.


Apply Early for Your Visa - Request Your Letter of Invitation Now!

Attendees should familiarize themselves with visa requirements well in advance. We encourage you to apply for your visa as early as possible. The U.S. has updated its visa policies to increase security for its citizens and visitors. Receiving a visa may take longer than you expect. For details that may apply specifically to your country, see information posted by your nearest consulate or embassy.


Visa Wait Times

Some consulates may have backlogs in scheduling visa interviews so applicants should first contact their consulates to find out how long the wait is for an interview and to estimate how long it may take to have a non-immigrant visa processed.


Current Visa Wait Times

Look up your consulate's wait times on the U.S. Department of State's list.


Visa Letters of Invitation - Request Your Letter of Invitation Now!

Upon request a personalized letter of invitation will be sent to you. Please contact:


Professor Larry Overzet

The University of Texas at Dallas


Visa Interview Advice

WARNING: No assurances regarding the issuance of visas can be given in advance. Final travel plans or the purchase of a non-refundable ticket should not be made until a visa has been issued.

What to Take to Your Visa Interview

Specific and detailed explanations related to your purpose for travel.

Example: A copy of your letter of invitation from Professor Overzet.

Complete travel itinerary and (if appropriate) program schedule.

Note: Airline ticket proof of purchase is not a required item for documenting your travel itinerary.

Explanation from your institution regarding how your travel will be funded.


Biometric Identifier

For U.S. visas the chosen biometric identifier method, objective measurement of a physical characteristic, is a digital photo and electronic fingerprints. All fingers of a visa applicant are electronically scanned in a quick, inkless process during the consular officer's interview with the applicant.