Ka,
Your milage I think is as the crow flies. Sea To Ket is 800 and change but as a straight line. By the time you go like a snake up the coast and out of the way to get to anchorages and points of interest Sea to Ket could be 1200 to 1500 mi. And running about in SE could easily run up 1500.
I admit it's possible my memory is bad and I'm basing this all on the 800 or so miles to Ketchikan. Took us 23 days on our 6 knot Willard LaConner to Ketchikan. And we were not sight seeing. Whatever the number it's a long way even if only one way.
More than a few years ago, we left GH at noon in a 33ft Grady. Spent the first night in Campbell River... The second night North of Shearwater, The third night in Dundas Island, the 4th night in Wrangell... We stopped to fish along the way and had to wait for the wind to die down in Dixon else we would have been in Ketchikan in 2 and a half days... We stop and enjoy the areas along the way, now it's 2 and half weeks to get up there...