Thailand Island Hopping: Routes, Ferries & eSIM Coverage

For a first Thailand island-hopping trip, choose one coast. Phuket, Koh Phi Phi, Krabi and Koh Lanta form a practical Andaman route. Koh Samui, Koh Phangan and Koh Tao are a natural group in the Gulf of Thailand. Trying to combine both coasts in a week adds long transfers and leaves less time on the islands.

This guide gives you realistic seven- and ten-day routes, explains how ferry transfers work and answers an important question for travellers: will your eSIM and mobile data work while moving between Thai islands?

A Thailand-wide eSIM can work across different islands without needing a new plan at every stop. However, mobile signal can disappear offshore, so ferry tickets and arrival details should be saved before boarding.

Andaman Sea or Gulf of Thailand: which coast should you choose?

Thailand's most popular island-hopping destinations are spread across two main coastal regions.

The Andaman coast includes Phuket, Koh Phi Phi, Koh Lanta, Koh Lipe and the islands around Krabi.

The Gulf of Thailand includes Koh Samui, Koh Phangan and Koh Tao, along with other island groups further east.

Both offer beautiful beaches and island-hopping opportunities, but their weather patterns and transport connections differ.

Andaman coast: generally best from November to April

The Andaman coast typically experiences its more favourable beach and boating conditions during the drier months, broadly from November to April.

The southwest monsoon usually brings more rain and rougher seas from around May to October. Some seasonal boat routes operate less frequently or stop altogether during this period.

Certain protected marine destinations, including the Similan Islands, also have seasonal visitor closures. Check the current opening dates before arranging excursions.

Gulf coast: a different weather pattern

Koh Samui, Koh Phangan and Koh Tao follow a somewhat different rainfall pattern, with particularly wet conditions often occurring towards October, November and December.

The Gulf islands can be attractive during parts of the year when the Andaman coast is experiencing its southwest monsoon.

However, no season guarantees calm seas or sunshine. Conditions can change quickly, and individual islands can experience different weather on the same day.

Best Thailand island-hopping routes

Choose a route based on where you arrive, how many days you have and what you want to do. The itineraries below are practical starting points, not fixed ferry schedules.

Route 1: Phuket, Koh Phi Phi, Krabi and Koh Lanta

This is one of the most popular Andaman Sea routes, combining famous scenery with relatively straightforward transport connections.

A suggested 10-day itinerary:

1. Days 1–3: Phuket. Settle in, explore the beaches and enjoy the island's restaurants and attractions.
2. Days 4–5: Koh Phi Phi. Experience the limestone cliffs, boat excursions and lively atmosphere.
3. Days 6–7: Krabi. Stay around Ao Nang or Railay for beaches, dramatic scenery and day trips.
4. Days 8–10: Koh Lanta. Finish with a slower pace, quieter beaches and relaxed evenings.

Ferry and speedboat connections operate between several of these destinations, particularly during the main tourist season. Some routes require transfers through particular piers or mainland locations.

Koh Phi Phi is popular and can become crowded, so travellers looking for a quieter experience may prefer spending more nights on Koh Lanta.

Route 2: Koh Samui, Koh Phangan and Koh Tao

This is a convenient Gulf of Thailand route, especially if you want a combination of resorts, beaches and diving.

A suggested seven-day itinerary:

1. Days 1–3: Koh Samui. Enjoy the beaches, restaurants and wider range of accommodation.
2. Days 4–5: Koh Phangan. Explore beaches and quieter areas beyond the island's famous nightlife.
3. Days 6–7: Koh Tao. Spend time snorkelling, diving or exploring the island's viewpoints.

Regular ferry services connect these islands, although journey times and departure options depend on the operator and route.

Koh Samui has an airport, making it a convenient starting point for many visitors. Alternatively, travellers can reach the Gulf islands through mainland transport connections, including services via Surat Thani.

Route 3: Koh Lipe and the southern Andaman islands

For travellers looking for smaller islands and clear water, Koh Lipe is a popular choice in southern Thailand.

One common approach is to travel through Pak Bara on the mainland and take a boat to Koh Lipe.

Seasonal boat connections can also link Koh Lipe with other Andaman destinations, but availability varies throughout the year.

Because Koh Lipe is further south than Phuket or Krabi, it's worth allowing enough time rather than squeezing it into a short itinerary.

Route 4: Koh Chang, Koh Mak and Koh Kood

The islands near Trat in eastern Thailand are another option for travellers who want to explore beyond the most familiar tourist routes.

Koh Chang offers beaches, restaurants and a wider range of accommodation. Koh Mak is smaller and more relaxed, while Koh Kood is known for its quieter atmosphere and natural scenery.

These islands are reached through mainland ferry connections in Trat province, with additional island-to-island services available on certain routes and during particular seasons.

This region is worth considering if you're travelling from Bangkok and prefer not to fly to southern Thailand.

How do you travel between Thailand's islands?

Most island-hopping journeys involve ferries, speedboats or a combination of boats and mainland transfers.

The type of transport depends on the route:

• Passenger ferries: Common on established routes, with different journey times and facilities.
• Speedboats: Often faster, but can be less comfortable in rough seas.
• High-speed catamarans: Used on several popular routes, particularly around the Gulf islands.
• Combined tickets: Some operators sell packages including a bus or minivan transfer and a ferry journey.

Operators serving various routes include Lomprayah, Seatran, Raja Ferry and other regional ferry companies.

Not every operator serves every island, and schedules can change seasonally.

How long do ferry journeys take?

Some island crossings take less than an hour, while others require several hours or additional mainland transport.

For example, the crossing between Koh Samui and Koh Phangan can be relatively short, while travelling between more distant Andaman islands may involve a much longer journey.

Journey times depend on departure pier, vessel type, weather and intermediate stops.

Check the actual scheduled duration when booking rather than relying on a general estimate for an island pair.

How to book ferries in Thailand

You can book many ferry routes directly with operators, through accommodation providers or using transport booking platforms.

Platforms such as 12Go can be useful for comparing available departures and combined transport options.

Before booking, check:

• Departure pier: Some islands have multiple piers located far apart.
• Arrival pier: Make sure you know how to reach your accommodation afterwards.
• Transfer inclusion: Some tickets include hotel pickup or onward transport, while others don't.
• Luggage allowance: Rules can differ between operators and vessel types.
• Cancellation conditions: Understand what happens if the service is disrupted by weather.
• Check-in requirements: Follow the operator's specified arrival time.

During busy holiday periods, popular routes can sell out, so booking ahead is sensible once your itinerary is confirmed.

Can you travel directly between the Andaman and Gulf islands?

No direct ferry connects the main Andaman island groups with Koh Samui, Koh Phangan or Koh Tao.

To move between these regions, you'll need to travel across mainland southern Thailand or use an appropriate flight connection.

For example, travelling from Phuket to Koh Samui may involve a flight where available, or a road journey followed by a ferry.

If you have only a week, combining both coasts can mean spending a disproportionate amount of time in transit.

For longer trips, visiting both is possible, but allow a full travel day for some connections and check the actual transport options.

Will your phone have signal while island hopping?

Yes, a Thailand-wide travel eSIM can work across Phuket, Phi Phi, Samui, Koh Tao and other covered Thai islands. You do not need a separate eSIM for each island. Reception is strongest around populated areas and can weaken offshore or in remote locations.

Thailand's main commercial mobile network groups are AIS and True Corporation. Travel eSIMs connect through whichever local networks their providers support.

On major tourist islands

Phuket, Koh Samui, Koh Phangan, Koh Tao and Koh Phi Phi have established mobile coverage in their main tourist areas.

However, reception can vary on isolated beaches, hillsides and inside buildings. Even where your phone shows signal bars, network congestion can affect data speeds.

On smaller islands

On islands such as Koh Mak, Koh Kood and Koh Lipe, coverage may be more limited away from developed areas.

A plan offering access to a network with stronger coverage at your specific destination can make a difference.

AIS is worth comparing for remote travel because of its broad geographic footprint. True also serves popular tourist destinations. Neither network can be declared the best at every beach or resort, so check the supported networks and the specific destinations on your route.

On ferries and speedboats

Do not expect continuous mobile data on a ferry. Your phone can connect near coastal towers, but reception can weaken or disappear as the boat travels farther offshore.

A travel eSIM doesn't provide satellite connectivity, so don't expect uninterrupted mobile data throughout a sea crossing.

If you need to access a ferry ticket, hotel address or transfer booking, save it before boarding rather than depending on an internet connection at sea.

Which eSIM is best for Thailand island hopping?

For island hopping, prioritise supported Thai networks, plan validity and enough data for the entire route before choosing solely on price.

Look for:

• Supported Thai networks: Check whether the package uses AIS, True or multiple networks.
• Enough validity: Make sure the plan lasts throughout your itinerary, including travel days.
• Suitable data allowance: Consider navigation, messaging, bookings and social media usage.
• Top-up availability: Check whether you can add data if your allowance runs out.
• Hotspot support: Useful if you plan to share your connection with another device.

If your trip includes remote islands, don't choose purely on the cheapest price. Check the supported networks first.

For a fuller comparison of Thai mobile networks, read our Thailand eSIM guide.

How much data do you need for an island-hopping trip?

Island hopping doesn't necessarily require more data than an ordinary holiday, but you'll probably use your phone regularly for directions, bookings and communication.

For a typical trip:

• 3GB–5GB: Suitable for around a week of light usage, including messaging, maps and occasional browsing.
• 5GB–10GB: A practical starting point for a week of regular navigation, social media and travel apps.
• 10GB–20GB: Worth considering for a two-week trip with regular phone use.
• 20GB or more: Better suited to heavy social media, frequent video calls, streaming or hotspot usage.

These are planning estimates rather than fixed requirements. Video uploads and streaming can use considerably more data than maps and messaging.

If you're considering an unlimited plan, check whether it has a daily high-speed allowance, reduced speeds or hotspot restrictions.

What to download before taking a ferry

A little preparation can prevent unnecessary problems when your connection disappears between islands.

• Offline maps: Download maps of your destination and surrounding areas using Google Maps or another suitable navigation app.
• Ferry tickets: Save the booking confirmation, QR code and departure pier details.
• Hotel information: Keep the accommodation address and contact number available offline.
• Transfer details: Save information about any pickup arranged at your arrival pier.
• Emergency contacts: Store important numbers and meeting arrangements somewhere accessible without mobile data.
• Payment backup: Carry an alternative payment method in case an app or payment terminal cannot connect.

Offline maps can help with navigation, but they won't provide every live feature, such as up-to-date traffic information or real-time transport changes.

What happens if your ferry is cancelled?

Weather-related cancellations are an important consideration when planning an island-hopping itinerary.

If your service is cancelled, contact the ferry operator or booking platform to check the available alternatives and applicable refund or rebooking conditions.

Avoid assuming another boat will depart later the same day. When sea conditions are unsafe, multiple services may be affected.

For this reason, it's worth keeping your accommodation and onward transport plans flexible, particularly during the wetter months.

Frequently asked questions

What is the best island-hopping route in Thailand?

For a first visit, Phuket, Koh Phi Phi, Krabi and Koh Lanta offer a popular Andaman itinerary. In the Gulf, Koh Samui, Koh Phangan and Koh Tao form another convenient route. Choose based on your travel dates and interests.

How many days do you need for island hopping?

Seven to ten days is enough to enjoy two or three islands without rushing. With two weeks, you can explore more destinations or spend longer on each island.

Can you island hop in Thailand during the rainy season?

Yes, but weather conditions and ferry availability vary by coast and time of year. Some routes operate year-round, while others are seasonal or more vulnerable to cancellations.

Will a Thailand eSIM work on ferries?

It can work while you're within range of a supported coastal mobile network. Reception may weaken or disappear farther offshore, so save important travel information before boarding.

Is AIS better than True for remote islands?

AIS is worth considering because of its broad geographic coverage, but actual performance depends on the specific island and location. Check the networks supported by your eSIM and available local coverage information.

Do I need a different eSIM for each island?

No. A Thailand-wide eSIM can be used across supported locations in the country, subject to the package's network coverage and validity period.

Plan your Thailand island-hopping adventure

Choose one coastal region for a shorter trip, confirm each ferry leg before booking accommodation and leave a buffer before your flight home. Save tickets and maps offline because mobile data can drop out at sea.

A single Thailand-wide travel eSIM can serve multiple islands, but the supported local network matters. Compare network access, validity and data limits before you buy.

Before departure, compare Thailand eSIM plans on eSIM Indexer by data allowance, validity and supported networks. If you are unsure whether your phone can use a travel eSIM, read our unlocked phone guide.

Editorial note: Ferry routes, seasonal operations, weather conditions, mobile coverage and eSIM plan terms can change. Suggested itineraries and data allowances are planning guidance, not guarantees. Confirm current sailing schedules with operators and plan details with your eSIM provider before booking.