International Attendees

The ASCO Annual Meeting brings together more than 35,000 oncology professionals from a broad range of specialties. Join colleagues from more than 100 countries to learn the latest practice-changing research and network with internationally recognized faculty and oncology professionals.

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More than half of Annual Meeting attendees come from countries outside of the United States and more than 3,000 abstracts are submitted internationally from over 80 countries. The information presented at the ASCO Annual Meeting helps to set global standards for high-quality patient care.


Access ASCO DIRECT™, which provides a customized, timely blend of the most relevant scientific meeting highlights and perspectives in the local language. ASCO DIRECT is an officially licensed program of the American Society of Clinical Oncology. 

Plan Your Trip

International Attendees have full access to the Attendee Resource Center, which has a host of resources to make it easier to plan your time in Chicago. Learn about airport and shuttle transportation, childcare options, and more.

Travel Information

The 2017 ASCO Annual Meeting will be hosted at Chicago’s McCormick Place, one of the nation’s largest and most impressive convention and meeting centers. Known for its unparalleled sophistication, class, and style, Chicago offers fine dining, world-famous museums, legendary entertainment, and plentiful shopping.  

If assistance is needed in booking individual travel, please contact ASCO Meetings for personalized assistance with travel, hotel and transportation.

For information on group hotel reservations, visit the Group Attendee page.

The Visa Process

Attending the ASCO Annual Meeting can require a visa for non-U.S. citizens. If you have registered but are unable to acquire a visa or leave your country and enter the United States, ASCO will refund your registration in full.

Visa letters can be obtained after attendees have registered online and paid in full. Attendees may request a visa letter using the link in the registration confirmation email or by logging in to the Registration website to review their registration. Visa letters are not available to attendees who are not paid in full or who have canceled their registration.

Do you need a visa?

Effective January 20, 2010, citizens of Visa Waiver countries may be unable to enter the United States without Electronic System for Travel Authorization (ESTA) approval from the U.S. Government. For more information about how to apply for ESTA authorization, visit the U.S. Customs and Border Protection website.

For non-U.S. travelers who need a visa to enter the United States, it is important that you begin the visa application process as soon as you register for the Annual Meeting. The application and interview process varies from country to country, and can take up to 90 days to complete. After you register for the Annual Meeting, you will be provided a website link where you may request a visa letter of invitation.

When does your U.S. visa expire?

If the traveler already has a U.S. visa appropriate for this travel, check the expiration date on the visa to make sure it will not expire before the planned travel date.

When does your passport expire?

In many cases, a visa will not be issued if the traveler’s passport will expire prior to six months after the traveler’s planned entry into the United States. For example, the 2017 ASCO Annual Meeting begins June 2. Passports for non-U.S. citizens traveling to the United States for the ASCO Annual Meeting cannot expire before December 1, 2017.

When should you apply for a U.S. Nonimmigrant Visa?

Non-U.S. citizens should apply for a U.S. Nonimmigrant Visa within 90 days before the anticipated travel date. Visa processing times vary from country to country and can change depending on the time of year—average visa wait times can be found on the U.S. State Department website.

Recent media reports have indicated that the Administration has instructed U.S. Consulates to request additional documentation from applicants for visas to the United States. This may include information concerning travel and work history as well as other details. We encourage travelers to familiarize themselves with these reports and factor in additional time for visa processing.

How should you apply for a U.S. Nonimmigrant Visa?

Visit the website of the local U.S. Embassy or Consulate in your country to find out the process for applying for a U.S. visa, and how long it will take. Visa applicants will need to schedule an interview appointment as a first step in the visa process.

Additional planning time beyond the guidelines above is needed for visa applicants applying at some embassies because of to the time required to schedule an interview appointment. Additionally, the wait times for a Nonimmigrant Visa do not include time for required security clearances or administrative processing, which may extend beyond the general timeframe guidelines.

For more information about obtaining a visa, please visit the U.S. State Department website.