Non-Immigrant Visas
Everyone traveling to the U.S. as temporary workers, students, exchange visitors, religious workers, performers and artists, crew, or journalist/media representatives needs visas. Nationals of many countries require visas for tourist or business trips as well.
Portuguese citizens traveling for business or pleasure for visits up to 90 days may be able do so without a visa under the Visa Waiver Program (VWP) as long as they meet the requirements of the program. To see if you qualify to travel under VWP please use our visa wizard here: http://portugal.usembassy.gov/visa_waiver_program/who-qualifies4.html