How long is the flight from Cardiff to Ko Samui?

Departing from Cardiff to Ko Samui will take you 40h 30m. The distance between Cardiff and Ko Samui is about 6266 mi.

In terms of precipitation, rainfall in Ko Samui ranges from 58.0 - 490.0 inches per month. November is typically the wettest month, when rainfall can reach 490.0 mm. February is typically the driest time to visit Ko Samui when rainfall is around 58.0 mm.

If weather is an important factor for your trip to Ko Samui, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 29.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 27.0 C).

What is the cheapest time of day to fly from CWL to USM?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Cardiff to Ko Samui as you normally would.

Can I find deals for flights from Cardiff to Ko Samui that include hotel bookings?

Yes. In addition to deals on Cardiff to Ko Samui flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Cardiff to Ko Samui?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Cardiff to Ko Samui.

Can I find deals for business class flights from Cardiff to Ko Samui?

Yes. Cheapflights offers flight deals from Cardiff to Ko Samui by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£1,152+ Cheap Flights from Cardiff to Ko Samui

Cheap flight deals from Cardiff to Ko Samui

Enter your travel dates to find the best prices.

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Cheapest flights from Cardiff to Ko Samui
Explore the most affordable flight options available from Cardiff to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 November 2026.

Thu 17/1213:25 -

3 stops35h 35m

Thu 24/1211:35 -

3 stops29h 15m

Deal found 2/11£1,415

Thu 17/1210:20 -

2 stops26h 30m

Thu 24/1220:30 -

2 stops20h 20m

Deal found 2/11£1,613

Find flight deals from Cardiff to Ko Samui

Round-trip from	£1,152

KLM
8/1-24/1
4 total stops
76h 50m total
Cardiff to Ko Samui

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

CardiffKo Samui

CWL Cardiff Wales - USM Ko Samui

CWLUSM

Cardiff Wales

Fri 8/1

17:30-17:00

2 stops40h 30m

Ko Samui

Sun 24/1

11:40-17:00

2 stops36h 20m

£1,152

CardiffKo Samui

CWL Cardiff Wales - USM Ko Samui

CWLUSM

Cardiff Wales

Thu 17/12

13:25-08:00

3 stops35h 35m

Ko Samui

Thu 24/12

11:35-09:50

3 stops29h 15m

£1,415

Fastest return journey

CardiffKo Samui

CWL Cardiff Wales - USM Ko Samui

CWLUSM

Cardiff Wales

Fri 8/1

16:05-20:50

3 stops21h 45m

Ko Samui

Sun 24/1

09:20-09:50

2 stops31h 30m

£1,717

Flights are sorted by cheapest return flights first.

Deals found on 1/11

Sorted by cheapest first

Best time to book a flight from Cardiff to Ko Samui

Have a flexible travel schedule? Discover the best time to fly to Ko Samui from Cardiff with our price prediction graph.

CWL-USM

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

How long is the flight from Cardiff to Ko Samui?
Departing from Cardiff to Ko Samui will take you 40h 30m. The distance between Cardiff and Ko Samui is about 6266 mi.
Can I find deals for flights from Cardiff to Ko Samui that include hotel bookings?
Yes. In addition to deals on Cardiff to Ko Samui flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Cardiff to Ko Samui?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Cardiff to Ko Samui.
Can I find deals for business class flights from Cardiff to Ko Samui?
Yes. Cheapflights offers flight deals from Cardiff to Ko Samui by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Can Cheapflights find flights from Cardiff to Ko Samui with no change fees?

Certainly. Search results for flights to Ko Samui from Cardiff shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Cardiff to Ko Samui become cheaper?

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Cheap flights from Cardiff to Ko Samui from £1,152

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/1. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Cardiff to Ko Samui

Cheapest flights from Cardiff to Ko SamuiExplore the most affordable flight options available from Cardiff to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 November 2026.

Explore the most affordable flight options available from Cardiff to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 November 2026.

Best flights from Cardiff to Ko SamuiDiscover carefully curated flight deals from Cardiff to Ko Samui that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 4 November 2026.

Discover carefully curated flight deals from Cardiff to Ko Samui that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 4 November 2026.

Last-minute flights from Cardiff to Ko SamuiDiscover last-minute flight deals from Cardiff to Ko Samui. Data last updated 4 November 2026 and is based on user searches.

Discover last-minute flight deals from Cardiff to Ko Samui. Data last updated 4 November 2026 and is based on user searches.

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Best time to book a flight from Cardiff to Ko Samui

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Related info for your journey

How long is the flight from Cardiff to Ko Samui?

Can I find deals for flights from Cardiff to Ko Samui that include hotel bookings?

How can I find direct flights from Cardiff to Ko Samui?

Can I find deals for business class flights from Cardiff to Ko Samui?

Travelling to a place near Ko Samui?

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Alternative routes for Cardiff to Ko Samui

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Complete your trip

Complete your trip to Ko Samui by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to Thailand

Book a non-stop flight to one of these other cities located in Thailand.

Search flights from Cardiff to Ko Samui by cabin class

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Other flights to Ko Samui

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Cardiff and Ko Samui flights

Browse other Cardiff and Ko Samui flight options. Last updated on 4 November 2026.

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How does Cheapflights help users find flights from Cardiff to Ko Samui?

Why should you use Cheapflights to find cheap flight tickets from Cardiff to Ko Samui?

Can Cheapflights find flights from Cardiff to Ko Samui with no change fees?

Can Cheapflights notify me if prices for flights from Cardiff to Ko Samui become cheaper?

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Cheapest flights from Cardiff to Ko Samui
Explore the most affordable flight options available from Cardiff to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 November 2026.

Best flights from Cardiff to Ko Samui
Discover carefully curated flight deals from Cardiff to Ko Samui that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 4 November 2026.

Last-minute flights from Cardiff to Ko Samui
Discover last-minute flight deals from Cardiff to Ko Samui. Data last updated 4 November 2026 and is based on user searches.