As a retired Air Drive Reserve officer, I strongly assist using McChord Subject at Joint Base Lewis-McChord as the subsequent airport.
Have a look at all the benefits, together with proximity to the metropolitan heart and Interstate 5, and a big airport space. The disadvantages, akin to getting U.S. authorities approval and crowded flight paths, can virtually definitely be solved.
McChord is an underutilized gem that must be shared with civilians. There are some 21 U.S. airports which can be joint use. Certain, there are issues, however fixing them is properly well worth the effort.
Jay Holman, Issaquah