A modern cruise ship in 2026 can typically cover between 400 and 500 nautical miles (about 460 to 575 miles) in a 24-hour period. Most large vessels, such as those from Royal Caribbean or Carnival, have a cruising speed of roughly 18 to 22 knots (21 to 25 mph). While ships can go faster—some can reach 30 knots—they rarely do so because of the exponential increase in fuel consumption and environmental impact. In 2026, "Slow Steaming" has become more common to comply with new carbon emission regulations, so a ship might cruise at a slower 15–17 knots if the distance between ports is short. On "Transatlantic" crossings, ships like the Queen Mary 2 are designed to maintain higher speeds to bridge the ocean in 6 or 7 days. Factors like ocean currents (like the Gulf Stream) and weather conditions can add or subtract about 50 miles from the daily total. Essentially, a cruise ship is like a "floating city" that moves at the speed of a casual bike ride, focused more on the journey and fuel efficiency than getting to the destination quickly.