Carnival Cruises Seattle is Carnival's homeport for cruises to Alaska. Carnival Cruises Seattle 7-night Alaska cruise starts with a cruise up the Inside Passage and visits the American Indian town of Ketchikan, the state capital of Juneau and the gold rush town of Skagway. In addition to 2 full days of cruising the breathtaking scenery of the Inside Passage, the Carnival Spirit sails Tracy Arm Fjord with its magnificent glaciers and high cliff walls carved-out by the ice over thousands of years. On the return to Seattle, the ships stops for an evening in one of the most picturesque cities on the West Coast, Victoria. Tip: Looking for a Bargain on a Carnival Alaska Cruise? The lowest prices on Carnival Cruise from Seattle in August and September. Typically by January, many of the lowest priced cabins for the Carnival Cruises from Seattle Alaska cruise season are already sold out.