A cruise from the U.S. West Coast to Hawaii typically takes 4 to 5 full days at sea to reach the first Hawaiian port. Most major cruise lines, such as Princess or Carnival, depart from Los Angeles, San Francisco, or San Diego. On a standard 15-day round-trip itinerary, you will spend Days 2 through 5 crossing the Pacific, arriving at your first island (often Maui or the Big Island) on Day 6. These sea days are a hallmark of the Hawaii cruise experience, allowing passengers to enjoy the ship's amenities and "ease into" the island time zone. If you are sailing from further north, such as Vancouver, the journey can sometimes take a bit longer depending on the route and weather. In 2026, these itineraries remain popular for those who enjoy the relaxation of the open ocean. If you prefer a shorter transit, the only alternative is to fly to Honolulu and board a ship like the Pride of America, which stays entirely within the islands, but for a true trans-Pacific voyage, you should budget nearly a week of travel time just for the crossing.