Seattle-Tacoma International Airport (SEA) — often called Sea-Tac — is the largest airport in the Pacific Northwest and a major international gateway to and from Asia, Canada, and Europe. With more than 130,000 passengers per day, including thousands of international travelers, Sea-Tac plays a key role in immigration enforcement at the U.S. border.
U.S. Customs and Border Protection (CBP) operates 24/7 at SEA, screening foreign nationals arriving on flights from countries including China, Japan, South Korea, India, Mexico, and the UK.
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.