Flight
The biggest airport near us, Portland International Airport. The easiest way to get from PDX to Corvallis is by rental car. Amtrak also goes from Portland to Albany, 15 minutes from Corvallis.
Flight
The Eugene airport is much smaller, but is closer to Corvallis. The easiest way to get from Eugene to Corvallis is by rental car, but Amtrak also runs from Eugene to to Albany, 15 minutes from Corvallis.