tdracer
SEA is an ALTN for our 380s. As are lots of other airports on the North American continent. To become a destination any of them would just need a regular pax number that supports the operation. It operated, several times a day to regional ports like MAN, BHX, MRU for example.
We would, on a regular basis during the season, carry cherries from up your way from both our SFO and LAX 380 ports, that the little Boeing that operated into SEA was unable to carry.