Cruise ships travel between 17 and 24 miles per hour during normal ocean crossings, with most ships cruising at around 20 to 22 mph.

That speed — called the service speed — is what the ship maintains for hours or days at a time across open water. It is not the maximum the engines can produce. Most modern cruise ships can reach 25 to 30 mph in short bursts, but running at top speed burns fuel fast and is reserved for emergencies or making up time after a delay.

The actual speed you experience depends on the ship's size, age, engine type, and the route. Older ships tend to cruise slower than newer ones. Larger ships often move at the lower end of the range because their engines are tuned for fuel economy over speed. Weather, currents, and port schedules also affect how fast a captain will push the ship on any given day.

Key Takeaways

  • Most cruise ships maintain a cruising speed of 20 to 22 mph, not their maximum possible speed.
  • Larger and older ships typically cruise at 17 to 20 mph, while newer and smaller ships may reach 23 to 24 mph.
  • A ship's maximum speed is usually 5 to 8 mph faster than its cruising speed but is rarely used because fuel consumption increases dramatically.
  • Wind, waves, and ocean currents can slow a ship by 1 to 3 mph even when the engines are running at full cruising power.

Why cruise ships do not travel at maximum speed

Cruise lines operate ships at cruising speed because it is the most economical point. A ship that weighs 100,000 tons or more burns enormous amounts of fuel. Running at maximum speed can increase fuel consumption by 30 to 50 percent compared to cruising speed, which means higher costs per passenger and per mile.

The captain also has no reason to rush. Cruise itineraries are planned around the ship's cruising speed. If a ship is scheduled to leave Miami on Monday and arrive in Cozumel on Wednesday, the captain calculates the distance and sets the speed to arrive on time. Going faster would mean arriving early, which creates problems at the port — the dock might not be ready, or the ship would have to circle offshore and burn more fuel waiting.

Weather and sea conditions also factor in. In rough seas, a captain may reduce speed to improve passenger comfort and reduce stress on the hull. In calm conditions, the ship may cruise at the upper end of its normal range.

How ship size affects cruising speed

Larger ships generally cruise slower than smaller ones. A mega-ship carrying 5,000 or more passengers might cruise at 19 to 21 mph, while a smaller ship with 2,000 passengers might cruise at 22 to 24 mph. The difference comes down to engine power relative to the ship's weight and hull design.

A bigger ship needs more engine power to move the same distance per hour, and that power has to push a heavier load through the water. The engines are sized to move the ship efficiently at a specific speed — usually the speed that balances fuel economy and schedule reliability. Going faster requires disproportionately more fuel.

Newer ships, regardless of size, often cruise at speeds toward the higher end because modern engines and hull designs are more efficient. Older ships, even if they are large, may cruise at 17 to 19 mph because their engines were built for different fuel standards and their hulls accumulate barnacles and corrosion that increase drag.

How long it takes to cross common cruise routes

Knowing a ship's cruising speed helps explain why certain routes take the time they do. A cruise from Miami to the western Caribbean covers roughly 400 to 500 nautical miles depending on the exact ports. At 20 mph (about 17 knots), that journey takes roughly 20 to 25 hours of sailing time, which is why most western Caribbean cruises are 7 days and include multiple port days.

A transatlantic crossing from Florida to Europe covers about 3,000 to 3,500 nautical miles. At 20 mph, that is roughly 150 to 175 hours of sailing time, or 6 to 7 days of pure ocean time. Most transatlantic cruises are 10 to 14 days, with the extra time split between port days and the slower pace of ocean travel.

Alaska cruises often involve slower speeds because ships navigate through narrower channels and past glaciers where the captain reduces speed for safety and passenger viewing. A ship that cruises at 22 mph in open ocean might slow to 8 to 12 mph in glacier-viewing areas.

What happens when a ship needs to make up time

If a cruise ship falls behind schedule — due to weather, a port delay, or an emergency — the captain can increase speed to make up time. Running at 25 to 28 mph instead of 20 to 22 mph can shave hours off a journey, though the fuel cost is significant. This is why delays at one port sometimes result in a shorter port visit at the next port rather than the ship speeding up.

Cruise lines calculate whether it is cheaper to pay port fees for an extra day, compensate passengers for a shortened port visit, or burn extra fuel to stay on schedule. In most cases, the line chooses to adjust the itinerary rather than increase speed.

How weather and currents affect actual speed

A cruise ship's speedometer shows the speed through the water, but the speed over the ground — the actual distance covered relative to the ocean floor — can be different. A strong ocean current can add or subtract 1 to 3 mph from the ship's actual progress.

The Gulf Stream, which flows north along the U.S. East Coast, can push a ship heading north at an extra 2 to 3 mph. A ship heading south into the current loses that speed. In the Atlantic, a ship heading east toward Europe benefits from the Gulf Stream and westerly winds, which is why eastbound transatlantic crossings are typically one to two days shorter than westbound crossings at the same cruising speed.

Rough seas and strong headwinds do not stop a ship, but they can slow it. A captain may reduce cruising speed by 1 to 2 mph in heavy weather to reduce pitching and rolling, which improves passenger comfort and reduces wear on the ship.

Frequently Asked Questions

How fast do cruise ships go compared to cargo ships?

Cargo ships typically cruise at 20 to 24 mph, similar to cruise ships. However, cargo ships are often designed to go slower — some operate at 15 to 18 mph — because fuel savings matter more than schedule. Cruise ships prioritize schedule reliability and passenger experience, so they maintain a steadier, faster pace.

Can you feel the ship moving at 20 mph?

No. At 20 mph on open ocean, the motion is smooth and the ship feels stationary. You feel the ship moving only when there is rough water, wind, or when the ship is turning or changing speed. In calm seas, passengers often cannot tell whether the ship is moving at 15 mph or 22 mph.

Do smaller cruise ships go faster than large ones?

Generally yes, but not by much. A small ship might cruise at 23 to 24 mph while a mega-ship cruises at 20 to 21 mph. The difference is usually 2 to 3 mph. Smaller ships are also more maneuverable and can navigate narrower channels, which is why they are used for Alaska and river cruises where speed is less important than agility.

Why do some cruises take longer than others on the same route?

Itineraries are planned around the ship's cruising speed and the number of port days. Two ships on the same route might take different amounts of time if one is older and slower, or if one has more port days built in. Weather and delays also affect actual sailing time, though cruise lines schedule extra time to account for typical conditions.

What is the difference between knots and mph?

A knot is one nautical mile per hour. One nautical mile equals 1.15 regular miles. So a ship cruising at 20 knots is traveling at about 23 mph. Cruise lines and maritime professionals use knots; the general public uses mph. Both describe the same speed, just in different units.