A standard 2026 transatlantic cruise typically features between 6 and 8 consecutive sea days. For the iconic "linear" crossing on the Queen Mary 2 between Southampton and New York, you will experience 7 full days at sea with no port stops. On more leisure-focused "repositioning" cruises—which move ships between Europe and the Caribbean/Florida in the spring and fall—you might see a total of 12 to 15 days at sea, punctuated by a few stops in the Azores, Canary Islands, or Bermuda. These "sea-heavy" itineraries are highly prized in 2026 for their relaxation value and "slow travel" appeal, allowing passengers to fully disconnect from land-based stress. Because the ship is moving across the Atlantic, these days often involve a "25-hour day" as you cross time zones, giving you an extra hour of sleep or shipboard activity each night when traveling westward.