Koh Samui to Koh Tao: Ferry, Speedboat, and Private Charter Options (2026)

At a Glance

All figures are visitor-reported and operator-quoted estimates as of 2026. Confirm directly with operators before travel.

Quick Decision Guide

• Traveling with 4 or more people and luggage? Price a private speedboat charter. Once a group reaches four to six passengers, the per-person cost narrows considerably on lower-priced charters, and the logistics advantage applies regardless of group size.
• Solo or couple on a fixed schedule? The Lomprayah high-speed catamaran is the most time-reliable shared option on this route.
• Planning a Koh Phangan stop? Take the combined ferry and treat the stopover as a deliberate itinerary step rather than a delay.
• Traveling between October and December? Verify sea conditions before confirming any boat transfer on this route. This step is not optional.

What the Crossing Actually Involves

Koh Samui and Koh Tao sit on the same side of the Gulf of Thailand, separated by approximately 70 kilometers of open water. Because the route crosses exposed Gulf waters rather than hugging the coastline, comfort depends far more on sea conditions than on the length of the journey. There is no land route. Every option is a boat transfer.

Departures leave from Na Thon Pier on the west coast of Koh Samui. Arrival is at Mae Haad Pier on the west coast of Koh Tao, which is the island's main pier and the point from which most accommodation transfers are arranged.

The first detail that matters: Na Thon is not adjacent to Chaweng, Bo Phut, or the northeast coast, where most mid-range and luxury accommodation sits. Travelers staying on the east or north side of Samui face a road transfer of 25 to 45 minutes before they reach the departure pier. This leg does not appear on ferry schedules, but it is part of the journey and needs to be factored into departure timing.

Along this stretch, the Gulf of Thailand is open water. The crossing is not a scenic coastal passage through sheltered bays. Between December and April, conditions are generally calm. From October through December, sea conditions can become rough enough to affect both schedule and comfort.

The Shared Ferry Options

Lomprayah High Speed Catamaran

Lomprayah is the most consistently used operator for this route. The high-speed catamaran runs from Na Thon Pier to Mae Haad Pier in approximately 1.5 hours.

Seating is cabin-style, enclosed, with air conditioning. Luggage is stored separately in a cargo hold. Tickets can be booked directly through Lomprayah or via the hotel concierge. Combined tickets covering Koh Samui, Koh Phangan, and Koh Tao are available in a single booking.

Schedules typically include two to three departures per day during peak season, fewer in low season. Confirm the current timetable before planning your departure time.

Seatran Discovery

Seatran operates a slightly slower crossing at a marginally lower fare. Journey time is approximately two hours from Na Thon to Mae Haad. It runs one to two crossings daily, depending on the season.

For budget-focused travelers with timing flexibility, Seatran is a competent option. For anyone on a fixed schedule or with an onward commitment on Koh Tao the same day, Lomprayah's higher frequency and shorter journey time is the better structure.

What Shared Crossings Do Not Accommodate Well

Both operators run fixed schedules. A missed departure caused by a slow checkout, a longer-than-expected road transfer from the east coast of Samui, or a Grab delay at Na Thon means waiting for the next sailing. In peak season, that is manageable. In the low season, the next departure may not run until the following morning.

Luggage handling on the catamaran deserves attention. Bags go into a cargo hold and are retrieved at Mae Haad Pier alongside everyone else on board. With a full vessel, this takes time. For travelers carrying oversized luggage or multiple bags, this is the most friction-heavy part of the shared crossing.

Private Speedboat Charter

A private speedboat charter removes most of the friction associated with the shared options. Departure time is set around the traveler's schedule rather than a fixed timetable. The boat departs from whichever pier is most convenient to the accommodation. Luggage is handled by the crew. Arrival at Mae Haad is immediate, without a queue.

Journey time is 1 to 1.5 hours, depending on the vessel and sea conditions on the day.

Cost: Approximately THB 8,000-18,000 per vessel, not per person. The range reflects operator, vessel type, and season. A basic speedboat at the lower end of the range serves the same functional role as a premium vessel at the higher end; the difference lies in comfort, speed, and crew professionalism.

Group economics: Once a group reaches four to six passengers, the per-person cost narrows considerably, especially on lower-priced charters. The logistics advantage over a shared crossing applies at any group size.

One realistic note on the crossing itself: The Gulf of Thailand on this route is open water. It is not a scenic passage through limestone formations or sheltered bays. The value of the private charter is operational, not experiential. Couples and honeymooners should factor this in before committing to the charter solely on scenic grounds. The logistics advantage is real; the scenery is ordinary open water.

For a broader framework on how private charter pricing is structured for boat transfers in Thailand, the Thailand Private Transfer Costs Explained guide covers the cost logic across different route types.

The Koh Phangan Stopover Route

Some travelers book a combined ferry that routes through Koh Phangan between Samui and Koh Tao. Total journey time is approximately three hours, including the Phangan stop.

This structure makes sense under two conditions: the traveler has a planned overnight or day stop at Koh Phangan, or the combined fare represents a meaningful saving compared to a direct booking.

It does not make sense as a default booking choice. Three hours of transit time across two piers adds real friction to what should be a straightforward crossing. Travelers who pick up the Phangan combined ticket without realizing it includes a stop sometimes arrive at Koh Tao significantly later than planned.

When booking any ticket marketed as a combined or multi-stop service, confirm explicitly whether the service stops at Koh Phangan and how long the stopover lasts.

What Gets Underestimated on This Route

The Road Leg on Samui

Na Thon Pier sits on the west coast of Koh Samui. The majority of accommodation, including most of the mid-range and luxury resort zones, is on the north and east coasts. The road transfer from Chaweng or Bo Phut to Na Thon runs 25 to 45 minutes under normal conditions, longer during morning traffic.

Travelers who book a 9:00 AM catamaran and plan to check out at 8:30 AM from a northeast coast property are creating an unworkable transfer. The road leg needs to be confirmed before the departure time is set, not after.

Luggage on Shared Crossings

High-speed catamaran seating on Lomprayah is enclosed and assigned. Luggage goes separately into cargo. Upon Mae Haad's arrival, all passengers retrieve their bags from the same hold at the same pier. On a full vessel during peak season, this takes longer than most travelers anticipate. For anyone traveling with two or more large bags, the private charter begins to justify itself on luggage handling alone.

Sea Conditions in Monsoon Season

The northeast monsoon affects the Gulf of Thailand from October through December. Koh Samui in November carries a high probability of sustained multi-day rainfall, and boat crossings in this window operate in meaningfully higher sea states. Complete cancellations are less common than delayed departures or rough crossings, but schedules can still change when sea conditions deteriorate.

The Koh Samui Travel Guide covers the Gulf Coast seasonal window in detail. Travelers booking between October and December should not plan a tight onward connection at Mae Haad on arrival day. Leave buffer time.

Arrival at Mae Haad and Onward to Your Property

Mae Haad Pier is Koh Tao's main commercial landing point on the west coast. Accommodation around Sairee Beach is only a short transfer north of Mae Haad. Properties on the quieter east coast, such as Tanote Bay or Aow Leuk, require a significantly longer 20 to 35-minute road journey. This leg is not always included in transfer packages and should be confirmed with the property before the day of arrival.

Seasonal Timing Summary

FAQ

How long does it take to get from Koh Samui to Koh Tao? By high-speed catamaran, approximately 1.5 hours from Na Thon Pier to Mae Haad Pier. Add 25 to 45 minutes of road transfer time from your accommodation to the pier if you are staying on the north or east coast of Samui. Total door-to-door time is typically 2.5 to 3 hours from a property in Chaweng or Bo Phut.

Is there a direct boat from Koh Samui to Koh Tao? Yes. Lomprayah and Seatran Discovery both operate direct services. Some combined tickets include a stopover on Koh Phangan; confirm whether the service is direct before booking.

What is the cheapest way to get from Koh Samui to Koh Tao? Shared catamaran or ferry, typically THB 500 to 800 per person. These are the most cost-effective options for solo travelers and couples with minimal luggage.

Is a private speedboat charter worth it for this crossing? For groups of three or more, or travelers with significant luggage and flexible timing, yes. The economics compress at group size, and the logistics advantage over a shared crossing is real. For a couple on a budget, the shared catamaran is the more defensible choice. The crossing is open Gulf water, not a scenic route, so the private option is most valuable for logistics rather than the journey experience itself.

Can the weather affect the Koh Samui-to-Koh Tao transfer? Yes. October through December carries the highest risk of rough sea conditions that affect schedules and comfort. Crossings are rarely canceled outright, but the experience on a full-size catamaran in a heavy sea state is uncomfortable. Travelers with fixed onward flights or commitments should not schedule arrival at Mae Haad with tight margins during this window.

For thoughtful travel planning and coordination inquiries, including island transfer sequencing and routing across the Gulf Coast, you can reach us directly at info@southeastasiasimplified.com.