Ngaire, I can't get the links for air to open on Silversea site. I am trying to figure out if we are in zone 1, 2, or 3. Does Silversea also charge more to leave from smaller airports?
Great circle route from Atlanta to Kangersulluaq is almost due north; going through Copenhagen is so far out of the way; alas, I don't think there are other options. Frequent flyer miles aren't going to be a good choice.