Although Portland [1] has the state’s main airport, there is good air service to Redmond [2], serving central Oregon, and Medford [3] in the south. If eastern Oregon is your destination, consider flying in and out of Boise, Idaho.
Portland has excellent public transportation, including efficient light-rail service between the airport and downtown, but most travelers outside of the Portland metro area go by car. For information about roads and public transportation options outside Portland, visit www.tripcheck.com [4].
Links:
[1] http://www.moon.com/destinations/oregon/portland
[2] http://www.moon.com/destinations/oregon/central-oregon/redmond
[3] http://www.moon.com/destinations/oregon/southern-oregon/medford
[4] http://www.tripcheck.com