Pass rider:
https://www.passrider.com/reservations/advanced-search/
Actually shows more flights to SEA than to PDX, although some of those are Compass. I love Redmond, but it isn’t the most connected place in the world and winter driving can be iffy. Actually MOVING to the SEA area with current house prices is sort of iffy on FO pay unless you retired as an O-5 or above. But depending on your plans, there is a middle ground. Take the ac of your choice and move to north of Kalama and south of Tacoma along the I-5 corridor. Property is generally reasonable there and you can take call at home while being able to reliably get to either PDX or SEA while on call. Of course you’d have to pay sales tax but you’ll lose having to pay state income tax.
You will have to learn to pump your own gas though.