American Constellation on the Inside Passage, which is in the southeastern region of the state. Eight-night Southeast Alaska cruises will operate roundtrip from Juneau. 11-night Alaskan Explorer cruises venture further into the Inside Passage, Clarence Straight, Tracy Arm, and Glacier Bay. The longer 11-night voyages will also be offered roundtrip from Juneau, as well as from Ketchikan to Juneau. American Constellation in Alaska (Photo courtesy of American Cruise Lines) American Cruise Lines operates small United States-built, crewed, and flagged vessels, which hold just 100 to 190 passengers and visit only domestic ports of call. The company has worked closely with local and state officials in southeast Alaska and across the country to safely bring back domestic small-ship cruising in the United States.