Information for International Travelers

Entry into the U.S.


Visas & Visa Waivers

ESTA & Visa Waiver Program
The Visa Waiver Program (VWP) allows citizens of 41 participating countries to travel to the United States without having to obtain a visa, for stays of no more than 90 days for the purposes of business, tourism, visiting, or pleasure. See if you are eligible for the Visa Waiver Program.

U.S. Visas
Visitors who are not eligible for the Visa Waiver Program need to apply for a visa. This should be done as soon as possible to avoid delays. Use the Visa Wizard to find out what visa type is appropriate for you.

Should you need an invitation letter to support your visa application, you either must be the presenting author of an accepted abstract or must be registered and paid in full for the conference. Please email ISPD Headquarters to request a letter of invitation once you have registered or received your abstract acceptance notification. Should your visa application not be accepted, we will be happy to refund your registration fee.


e-Passport (required for the Visa Waiver Program)

Mobile Passport Control (free, secure mobile app)

Airport Wait Times for Passport Control

Security & Customs

Airport Security Screening

Clearing Customs

Travel Advice

International Travel Information For Boston

Travel Insurance Advice