At PDX you need to clear the international arrival zone and go through TSA screening even to depart from an internation gate. Departing from an international g

At PDX you need to clear the international arrival zone and go through TSA screening even to depart from an internation gate. Departing from an international gate requires the same screening for domestic flights. Arriving at international gates looks like the following: Gate -> Corridor -> Customs -> International Baggage Claim (Explicitly so you can get your bags re-screened by US personnel) -> TSA screening -> airport concourse -> onward travel via domestic gates / onward travel via international gates / exit The last time I went through this was from a flight from AMS. So coming from Schipol does not free you from the requirement to reclear security on the way out of the airport. The International and Domestic security zones are not distinct, all international arrivals are required to be re-screened by US personnel before rejoining the regular security zone, no matter which onward destination.