Sadly we don't have the number of quilt shops that we used to have
I'm on the Southeast side and rarely get into Seattle proper any more.
Gossypium (latin name for the cotton plant) in Issaquah is just a short jaunt up I-90
https://www.gossypiumquilt.com/
Quiltworks NW in Bellevue moved a year or two ago into a smaller location -- but if you also do beading it is worth the trip!
https://www.quiltworksnw.com/
Pacific Fabrics (local chain store) moved into Quiltworks old location in Bellevue. I used to include their Sodo (south of the dome) location on my "Seattle's Cheap Secrets" tour, but about 5 years ago they reduced their discount on fabric and no longer have multiple "flat fold" tables so not worth the trip -- but if you are in Seattle downtown they are close.
There is a shop at the market (looks like they've moved since my last visit!)
https://www.undercoverquilts.com/sto..._Products.html
I haven't been in a couple of years, but I used to enjoy my regular trips to Carriage House Quilts in Des Moines, a bit south of the city but some good fish restaurants that way
https://www.carriagecountryquilts.com/
If you go out to Monroe or Redmond, the Ben Franklin stores are worth a look. As I understand they are individually franchised and so have different offerings.
I don't get out to Puyallup much, but the Quilt Barn comes to mind.
While Row by Row is over, here's the link to the Washington page, it might give you some more ideas (as well as addresses!, "Seattle" zip codes are likely to start as 980 or 981)
https://rowbyrowexperience.com/wp-co...18-Picture.pdf