Tours Built for You Visit world-renowned wineries. Tour Mt. St. Helens from the air. See the best views of Portland and spend the day tracing the gorgeous Columbia Gorge. Our tours are completely customizable and built around you. Hillsboro Aviation has offered complete helicopter and airplane services since 1980. Serving domestic and international markets in government, commercial, and private sectors, our 85+ employees and 13 turbine aircraft are dedicated to meeting all your aviation needs. We operate out of our award-winning headquarters at the Portland-Hillsboro Airport (KHIO). Read more...