My gut is to say yes but is your flight to PDX on United or United Express as United Express flights depart from T1 vs United Mainline departing from T-3 and you'll need to allow for transfer time if departing from T1 (and even tho you'll need to re-clear security after clearing customs and immigration, clear security in the International Terminal and take the airside walkway to T-3 (which lets you out near gate 75) for either your mainline flight to PDX or take the airside shuttle bus over to T1

Also, there is a lot of discussion over here in the United Forum

http://www.flyertalk.com/forum/unite...lidated+sfo%2A