In 2026, most modern cruise ships maintain a cruising speed of 20 to 24 knots, which translates to approximately 23 to 28 miles per hour (mph). While this might seem slow compared to land travel, it is optimized for fuel efficiency and passenger comfort; higher speeds significantly increase vibrations and fuel consumption. Some specialized ocean liners, like the Queen Mary 2, are built for speed and can reach up to 30 knots (34.5 mph) to handle transatlantic crossings in varying weather. Conversely, when ships are traveling short distances between islands (like in the Caribbean), they may slow down to just 12 to 15 mph to save fuel and ensure they don't arrive at the next port before the scheduled docking time. These speeds are carefully managed by AI-driven navigation systems that account for ocean currents and wind resistance to maintain the most sustainable "eco-speed" possible while ensuring the ship hits its 2026 itinerary milestones on time.