First, the only other int'l service that PDX
could support is perhaps Canadian service or a flight to LHR
. Even that is questionable.
Second, there is plenty of capacity for int'l flights left on D. Changes have already been made to shuttle pax to the new int'l meet/greet area in bag claim to prevent the need to reclear security at the end of D. Changes are coming to allow transfer pax to go between D and A/B/C via a shuttle bus, although it's not clear if it's for NW
's int'l pax only or for all pax.
If it's for all pax, then AS
could potentially use narrowbody gates on D for further expansion. There's a bit of capacity for the taking there.
is nuts if they think that an additional terminal is a good idea. They have new infrastructure at the terminal, brand new roadways, a new light rail station, and a pretty efficient operation except for the baggage screening machines in the lobby (and that's being addressed, I think). They have concourse A (Horizon regional), which is now the oldest (and nastiest), and could definitely be redeveloped for major expansion. They have concourse B, hardly a concourse at all, which could also be redeveloped.
If they needed more space -- which right now they don't -- they could rebuild B into a regional facility, move A ops to the new B, and then redo A as more of a traditional concourse with perhaps a hammerhead to cram a few more a/c in.
The Port has no need, no money, and no support for a new separate terminal. I don't think we'll see any expansion at all -- much less a new terminal -- for some time to come.