And since this is FlyerTalk, NW will soon be flying from SEA direct to LHR. The June rates were $666 the last time I checked.
Lots of cruise action out of Seattle, both north to Alaska and south to various points.
Don't know if anyone mentioned Pike's Place Market (I got tired of reading when I hit the bickering), but it is delightful.
You'll love it, I think.
Romelle