San Francisco International Airport (SFO) is a major West Coast hub for international travel, with direct flights to and from Asia, Europe, Oceania, Canada, and Latin America. As one of the busiest international airports in the U.S., SFO sees tens of thousands of foreign nationals pass through its terminals every day.
U.S. Customs and Border Protection (CBP) operates at all international arrival points within SFO, conducting inspections and enforcing immigration laws. SFO is known for processing a high volume of students, tech workers, business travelers, and tourists — and it’s also known for aggressive CBP screening in some cases, especially when travel history or visa purpose is unclear.
Whether you’re traveling on a visitor visa, student visa, work visa, or ESTA, entry is not guaranteed. A single interaction at the airport can result in deportation, visa cancellation, or even a multi-year bar from returning to the U.S.