The U.S. Department of Homeland Security (DHS) is eliminating the use of paper I-94W forms (“green” I-94s) for Visa Waiver Program (VWP) travelers with an approved Electronic System for Travel Authorization (ESTA) arriving in the United States at all airports by the end of this summer.
VWP travelers are encouraged to submit ESTA applications – online at https://esta.cbp.dhs.gov – as soon as they begin making travel plans.
ESTA applications may be submitted at any time before travel, but at least 72 hours in advance of travel.
ESTA authorizations are valid for two years or until the applicant’s passport expires. ESTA authorization for VWP travel is currently available to citizens and eligible nationals of 36 designated countries.