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).

In terms of precipitation, rainfall in Ko Samui ranges from 58.0 - 490.0 mm 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.

Direct flights to Ko Samui

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Cheapest flights to Ko Samui
Explore the most affordable flight options available to Ko Samui. Find the lowest fares based on data from user searches, with prices last updated on 25 July 2026.

Sat 5-917:20

HKG

USM

Nonstop3h 20m

Bangkok Airways

Sat 12-911:55

USM

HKG

Nonstop3h 25m

Bangkok Airways

Deal found 22-7HK$4,148

Sat 22-817:20

HKG

USM

Nonstop3h 20m

Bangkok Airways

Fri 28-811:55

USM

HKG

Nonstop3h 25m

Bangkok Airways

Deal found 22-7HK$4,156

Mon 7-917:20

HKG

USM

Nonstop3h 20m

Bangkok Airways

Mon 14-911:55

USM

HKG

Nonstop3h 25m

Bangkok Airways

Deal found 23-7HK$4,266

Thu 3-917:20

HKG

USM

Nonstop3h 20m

Bangkok Airways

Thu 10-911:55

USM

HKG

Nonstop3h 25m

Bangkok Airways

Deal found 20-7HK$4,274

Sun 6-917:20

HKG

USM

Nonstop3h 20m

Bangkok Airways

Sun 13-911:55

USM

HKG

Nonstop3h 25m

Bangkok Airways

Deal found 23-7HK$4,297

Mon 14-917:20

HKG

USM

Nonstop3h 20m

Bangkok Airways

Mon 21-911:55

USM

HKG

Nonstop3h 25m

Bangkok Airways

Deal found 22-7HK$4,376

Sat 21-1117:05

HKG

USM

Nonstop3h 30m

Bangkok Airways

Sun 29-1111:40

USM

HKG

Nonstop3h 15m

Bangkok Airways

Deal found 21-7HK$4,587

Mon 14-917:20

HKG

USM

Nonstop3h 20m

Cathay Pacific

Mon 21-911:55

USM

HKG

Nonstop3h 25m

Cathay Pacific

Deal found 22-7HK$4,760

Fri 28-817:20

HKG

USM

Nonstop3h 20m

Bangkok Airways

Tue 1-911:55

USM

HKG

Nonstop3h 25m

Bangkok Airways

Deal found 21-7HK$4,784

Best time to book a flight to Ko Samui

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

HKG-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.

Fly from

Route

Departure

Return

Price

Cheapest return flight

Fastest return journey

Hong KongKo Samui

HKG - USM

HKGUSM

Hong Kong Intl

Sat 22-8

17:20-19:40

Nonstop3h 20m

Ko Samui

Fri 28-8

11:55-16:20

Nonstop3h 25m

HK$4,188

Hong KongKo Samui

HKG - USM

HKGUSM

Hong Kong Intl

Mon 21-9

17:20-19:40

Nonstop3h 20m

Ko Samui

Sat 26-9

11:55-16:20

Nonstop3h 25m

HK$4,266

Hong KongKo Samui

HKG - USM

HKGUSM

Hong Kong Intl

Thu 3-9

17:20-19:40

Nonstop3h 20m

Ko Samui

Thu 10-9

11:55-16:20

Nonstop3h 25m

HK$4,274

Hong KongKo Samui

HKG - USM

HKGUSM

Hong Kong Intl

Fri 11-9

17:20-19:40

Nonstop3h 20m

Ko Samui

Sat 17-10

11:55-16:20

Nonstop3h 25m

HK$4,862

Hong KongKo Samui

HKG - USM

HKGUSM

Hong Kong Intl

Tue 8-9

17:20-19:40

Nonstop3h 20m

Ko Samui

Sun 13-9

11:55-16:20

Nonstop3h 25m

HK$4,925

Hong KongKo Samui

HKG - USM

HKGUSM

Hong Kong Intl

Wed 26-8

17:20-19:40

Nonstop3h 20m

Ko Samui

Thu 3-9

11:55-16:20

Nonstop3h 25m

HK$4,932

Hong KongKo Samui

HKG - USM

HKGUSM

Hong Kong Intl

Sun 30-8

17:20-19:40

Nonstop3h 20m

Ko Samui

Sun 6-9

11:55-16:20

Nonstop3h 25m

HK$4,995

Hong KongKo Samui

HKG - USM

HKGUSM

Hong Kong Intl

Thu 20-8

17:20-19:40

Nonstop3h 20m

Ko Samui

Fri 4-9

11:55-16:20

Nonstop3h 25m

HK$5,027

Hong KongKo Samui

HKG - USM

HKGUSM

Hong Kong Intl

Sat 22-8

17:20-19:40

Nonstop3h 20m

Ko Samui

Fri 28-8

11:55-16:20

Nonstop3h 25m

HK$5,113

Hong KongKo Samui

HKG - USM

HKGUSM

Hong Kong Intl

Wed 5-8

17:20-19:40

Nonstop3h 20m

Ko Samui

Fri 14-8

11:55-16:20

Nonstop3h 25m

HK$5,332

Flights are sorted by cheapest return flights first.

Deals found on 20-7

Showing 1-10 of 21 resultsSorted by cheapest first

Reviews of airlines flying non-stop to Ko Samui

See what other customers who have flown with Bangkok Airways,泰國航空, andCathay Pacific to Thailand have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Bangkok Airways

8.1

Very Good

133 reviews

Check prices

Reviews

1 / 8

10.0

Excellent

Agata,Feb 2026

USM - DMK

Great short flight and free really good snack and water which I didn’t expect

Bangkok Airways

8.1

Very Good

133 reviews

Bangkok Airways

8.1

Very Good

133 reviews

Check prices

Reviews

1 / 8

10.0

Excellent

Agata,Feb 2026

USM - DMK

Great short flight and free really good snack and water which I didn’t expect

泰國航空

7.9

Good

411 reviews

Bangkok Airways

8.1

Very Good

133 reviews

Check prices

Reviews

1 / 8

10.0

Excellent

Agata,Feb 2026

USM - DMK

Great short flight and free really good snack and water which I didn’t expect

Cathay Pacific

7.6

Good

1,429 reviews

Bangkok Airways

8.1

Very Good

133 reviews

Check prices

Reviews

1 / 8

10.0

Excellent

Agata,Feb 2026

USM - DMK

Great short flight and free really good snack and water which I didn’t expect

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This is the cheapest price on a non-stop flight to Ko Samui found by a Cheapflights user in the last 72 hours by searching for a flight departing on 19-1. Fares are subject to change and may not be available on all flights or dates of travel.

Find flight deals to Ko Samui

Cheapest flights to Ko Samui
Explore the most affordable flight options available to Ko Samui. Find the lowest fares based on data from user searches, with prices last updated on 25 July 2026.

Explore the most affordable flight options available to Ko Samui. Find the lowest fares based on data from user searches, with prices last updated on 25 July 2026.

Best flights to Ko Samui
Discover carefully curated flight deals to Ko Samui that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 25 July 2026.

Discover carefully curated flight deals to Ko Samui that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 25 July 2026.

Last-minute flights to Ko Samui
Discover last-minute flight deals to Ko Samui. Data last updated 25 July 2026 and is based on user searches.

Discover last-minute flight deals to Ko Samui. Data last updated 25 July 2026 and is based on user searches.

One-way flights to Ko Samui
Search for one-way flight options to Ko Samui. Find affordable one-way fares based on user searches. Data last updated 25 July 2026.

Search for one-way flight options to Ko Samui. Find affordable one-way fares based on user searches. Data last updated 25 July 2026.

Best time to book a flight to Ko Samui

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

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Use the filters below to find and compare direct flights to Ko Samui that are best for you.

Reviews of airlines flying non-stop to Ko Samui

See what other customers who have flown with Bangkok Airways,泰國航空, andCathay Pacific to Thailand have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Direct flights to Thailand

Book a non-stop flight to one of these popular destinations located in Thailand.

Direct flights to Asia

Book a non-stop flight to one of these popular destinations located in Asia.

Airlines flying direct to Ko Samui

Consider these flights with airlines flying direct to Ko Samui.

Direct flights from Thailand

Consider flying direct from one of these origins located in Thailand.

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HK$2,470+ Direct flights to Ko Samui

This is the cheapest price on a non-stop flight to Ko Samui found by a Cheapflights user in the last 72 hours by searching for a flight departing on 19-1. Fares are subject to change and may not be available on all flights or dates of travel.

Find flight deals to Ko Samui

Cheapest flights to Ko SamuiExplore the most affordable flight options available to Ko Samui. Find the lowest fares based on data from user searches, with prices last updated on 25 July 2026.

Explore the most affordable flight options available to Ko Samui. Find the lowest fares based on data from user searches, with prices last updated on 25 July 2026.

Best flights to Ko SamuiDiscover carefully curated flight deals to Ko Samui that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 25 July 2026.

Discover carefully curated flight deals to Ko Samui that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 25 July 2026.

Last-minute flights to Ko SamuiDiscover last-minute flight deals to Ko Samui. Data last updated 25 July 2026 and is based on user searches.

Discover last-minute flight deals to Ko Samui. Data last updated 25 July 2026 and is based on user searches.

One-way flights to Ko SamuiSearch for one-way flight options to Ko Samui. Find affordable one-way fares based on user searches. Data last updated 25 July 2026.

Search for one-way flight options to Ko Samui. Find affordable one-way fares based on user searches. Data last updated 25 July 2026.

Best time to book a flight to Ko Samui

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

Cheapflights Fare Finder

Use the filters below to find and compare direct flights to Ko Samui that are best for you.

Reviews of airlines flying non-stop to Ko Samui

See what other customers who have flown with Bangkok Airways,泰國航空, andCathay Pacific to Thailand have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Direct flights to Thailand

Book a non-stop flight to one of these popular destinations located in Thailand.

Direct flights to Asia

Book a non-stop flight to one of these popular destinations located in Asia.

Airlines flying direct to Ko Samui

Consider these flights with airlines flying direct to Ko Samui.

Direct flights from Thailand

Consider flying direct from one of these origins located in Thailand.

100% Free

Book With Flexibility

Travel Smart

Cheapest flights to Ko Samui
Explore the most affordable flight options available to Ko Samui. Find the lowest fares based on data from user searches, with prices last updated on 25 July 2026.

Best flights to Ko Samui
Discover carefully curated flight deals to Ko Samui that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 25 July 2026.

Last-minute flights to Ko Samui
Discover last-minute flight deals to Ko Samui. Data last updated 25 July 2026 and is based on user searches.

One-way flights to Ko Samui
Search for one-way flight options to Ko Samui. Find affordable one-way fares based on user searches. Data last updated 25 July 2026.