International Attendee Resources

International Travelers

The AAS provides this travel information as a courtesy to meeting attendees.  It is the responsibility of each attendee to ensure that she/he/they has/have the necessary documents, including those for entry into another country or re-entry into his/her/their own country.  It is recommended that you check with your institution’s travel department for specific guidance in these matters.

Please refer to the Center for Disease Control official website for DETAILS ON AIR TRAVEL TO THE U.S.

Visa Requirements

All international visitors to the United States are required to have a valid passport; some attendees may need a visitor visa.  Please consult the embassy or consulate in your country well in advance of travel to ensure that the appropriate documentation is obtained.  We encourage all attendees planning to attend the AAS Annual Conference and in need of a Visa to apply as early as possible (At least 6 months in advance is recommended) and to pay careful attention to U.S. State Department guidance in this matter as some requirements may have changed since you last traveled to the U.S.

Please be advised the AAS does not have any influence on government decisions related to Visa applications.  We can neither advise you on what steps you should take nor speak to anyone on your behalf.  The links below are included for your reference but it is your responsibility to follow all steps and instructions as printed and in a timely manner.  The only assistance the AAS can provide is by way of a personalized letter of invitation to be included with your Visa Application.  See the information listed below.

U.S. Visa home page  (

Visitor Visa InformationVisa Waiver ProgramU.S. Embassy/Consulate List

Letter of Invitation

If a visa is required for you to visit the United States, you will also need to carry a letter of invitation.  To request a letter of invitation, please contact the AAS Office or CLICK HERE to request a letter of invitation.

Letters of invitation are provided to the following individuals only:

  • Individuals accepted to present on a formal panel session, OR;
  • Individuals registered to attend the 2023 Annual Conference.

We will not provide a letter of invitation unless you meet one of the criteria listed above.