HK$1,158+ Cheap flights to Ko Samui

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9-10. Fares are subject to change and may not be available on all flights or dates of travel.
— USM
21 Aug — 28 Aug1
1 adult

Flights to Ko Samui in 2025

Find the latest flights to Ko Samui in 2025, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 70,647 searches and data was last updated on 16 August 2025.

Return from

HK$2,355

One-way from

HK$1,158

Popular in

July

Cheapest in

November

Average price

HK$4,725

Good round-trip deal

HK$3,783 or less
16-11-2-12
  • 16-11-2-12
  • 2 total stops
  • 26h 45m total
  • Hong Kong to Ko Samui
9-10
  • 9-10
  • 1 total stop
  • 10h 15m total
  • Hong Kong to Ko Samui
Highest demand for flights based on searches. 4% potential increase in price (HK$1,449 potential increase over avg. return price).
Cheapest flight prices on average. 1% potential price decrease (HK$358 potential savings vs. average return price).
Average for return flights in August 2025
Price to beat on a round-trip flight from Hong Kong Intl to Ko Samui.

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 16 August 2025.

Sun 16-1107:50HKG - USM
1 stop12h 05mMultiple Airlines
Tue 2-1207:00USM - HKG
1 stop14h 40mMultiple Airlines
Deal found 15-8HK$2,355
Tue 16-914:20HKG - USM
1 stop18h 00mMultiple Airlines
Fri 19-908:45USM - HKG
1 stop8h 35mMultiple Airlines
Deal found 15-8HK$2,464
Tue 23-907:40HKG - USM
1 stop14h 10mMultiple Airlines
Sat 27-908:45USM - HKG
1 stop8h 35mMultiple Airlines
Deal found 14-8HK$2,488
Sat 6-916:00HKG - USM
1 stop16h 20mMultiple Airlines
Wed 17-908:45USM - HKG
1 stop8h 35mMultiple Airlines
Deal found 14-8HK$2,511
Tue 11-1107:50HKG - USM
1 stop8h 50mMultiple Airlines
Sat 22-1107:00USM - HKG
1 stop6h 30mMultiple Airlines
Deal found 14-8HK$2,519
Mon 15-916:00HKG - USM
1 stop16h 20mMultiple Airlines
Fri 19-908:45USM - HKG
1 stop8h 35mMultiple Airlines
Deal found 14-8HK$2,527
Mon 15-916:00HKG - USM
1 stop16h 20mMultiple Airlines
Mon 22-907:00USM - HKG
1 stop6h 25mMultiple Airlines
Deal found 16-8HK$2,550
Mon 22-916:00HKG - USM
1 stop16h 20mMultiple Airlines
Thu 25-912:05USM - HKG
1 stop11h 45mMultiple Airlines
Deal found 16-8HK$2,558
Tue 18-1116:55HKG - USM
1 stop15h 15mMultiple Airlines
Fri 5-1208:15USM - HKG
1 stop6h 20mMultiple Airlines
Deal found 15-8HK$2,566
Fri 14-1114:20HKG - USM
1 stop7h 10mMultiple Airlines
Thu 20-1119:35USM - HKG
1 stop8h 55mMultiple Airlines
Deal found 16-8HK$2,574
Sat 30-822:05HKG - USM
1 stop10h 50mMultiple Airlines
Fri 5-908:45USM - HKG
1 stop8h 35mMultiple Airlines
Deal found 14-8HK$2,589

Cheapflights Fare Finder

 
Locate flights to Ko Samui that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 70,647 searches and data was last updated on 16 August 2025.
Use the filters below to find and compare flights to Ko Samui that are best for you.

Fly from

Hong Kong

Route

Departure

Return

Price

Hong KongKo Samui

HKG - USM

HKGUSM

Hong Kong Intl

Sun 16-11

07:50-18:55

1 stop12h 05m

Ko Samui

Tue 2-12

07:00-22:40

1 stop14h 40m

HK$2,355

Hong KongKo Samui

HKG - USM

HKGUSM

Hong Kong Intl

Tue 16-9

14:20-07:20

1 stop18h 00m

Ko Samui

Fri 19-9

08:45-18:20

1 stop8h 35m

HK$2,464

Hong KongKo Samui

HKG - USM

HKGUSM

Hong Kong Intl

Tue 23-9

07:40-20:50

1 stop14h 10m

Ko Samui

Sat 27-9

08:45-18:20

1 stop8h 35m

HK$2,488

Hong KongKo Samui

HKG - USM

HKGUSM

Hong Kong Intl

Sat 6-9

16:00-07:20

1 stop16h 20m

Ko Samui

Fri 19-9

08:45-18:20

1 stop8h 35m

HK$2,511

Hong KongKo Samui

HKG - USM

HKGUSM

Hong Kong Intl

Sat 6-9

16:00-07:20

1 stop16h 20m

Ko Samui

Wed 17-9

08:45-18:20

1 stop8h 35m

HK$2,511

Hong KongKo Samui

HKG - USM

HKGUSM

Hong Kong Intl

Tue 11-11

07:50-15:40

1 stop8h 50m

Ko Samui

Sat 22-11

07:00-14:30

1 stop6h 30m

HK$2,519

Hong KongKo Samui

HKG - USM

HKGUSM

Hong Kong Intl

Tue 11-11

07:50-15:40

1 stop8h 50m

Ko Samui

Fri 21-11

07:00-14:30

1 stop6h 30m

HK$2,519

Hong KongKo Samui

HKG - USM

HKGUSM

Hong Kong Intl

Mon 10-11

13:30-18:55

1 stop6h 25m

Ko Samui

Mon 24-11

07:00-14:30

1 stop6h 30m

HK$2,519

Hong KongKo Samui

HKG - USM

HKGUSM

Hong Kong Intl

Tue 11-11

07:50-15:40

1 stop8h 50m

Ko Samui

Tue 25-11

07:00-14:30

1 stop6h 30m

HK$2,519

Hong KongKo Samui

HKG - USM

HKGUSM

Hong Kong Intl

Mon 27-10

14:20-20:30

1 stop7h 10m

Ko Samui

Sat 1-11

11:45-20:00

1 stop7h 15m

HK$2,527

Flights are sorted by cheapest return flights first.

Deals found on 15-8

Showing 1-10 of 23 results
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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.
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.

Cheapflights Insights

Everything you need to know about your flight to Ko Samui

When is the best time to book a flight to Ko Samui?

Use this chart to determine the optimal time to book a return flight from Hong Kong to Ko Samui. Price data was last updated on 8 August 2025.

The price you pay for your flight to Ko Samui may vary depending on when you book. For the best chance of a lower fare, look to book 47 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

How long is the flight to Ko Samui?

On average, a flight from Hong Kong to Ko Samui takes 3 hours 20 minutes. Flights to Ko Samui from other popular cities in Hong Kong will vary in length. Below are a few examples of popular routes and their flight times.

Weekly flight availability to Ko Samui

The most flights from Hong Kong to Ko Samui are scheduled on a Monday (6 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (6 on average).

What are the cheapest airlines that fly to Ko Samui?

The cheapest airlines flying from Hong Kong to Ko Samui are Bangkok Airways and Cathay Pacific.

Rainfall in Ko Samui by month

Plan your trip to Ko Samui by taking into account the average rainfall totals by month.

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.

Temperature in Ko Samui by month

Plan your trip to Ko Samui by taking into account the average temperature totals by month.

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).

Reviews of airlines servicing Ko Samui

Get insights into the airlines that provide service to Ko Samui. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ko Samui. Reviews last updated 16 August 2025.
See what other customers who have flown with Bangkok Airways and Cathay Pacific to Thailand have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Crew

8.5

Boarding

8.0

Food

7.2

Entertainment

6.3

Overall

8.0

Comfort

7.9

Reviews

1 / 7
10.0
Excellent

Douglas,May 2025

USM - HKG

Flight was as expected: up and down at the right time and location without drama. Kayak needs to modify this survey to allow for “N/A.” For example, we didn’t use the entertainment system but are forced to rate it. In this case, the results are skewed and may lead to incorrect assumptions.

Crew

8.5

Boarding

8.0

Food

7.2

Entertainment

6.3

Overall

8.0

Comfort

7.9

Reviews

1 / 7
10.0
Excellent

Douglas,May 2025

USM - HKG

Flight was as expected: up and down at the right time and location without drama. Kayak needs to modify this survey to allow for “N/A.” For example, we didn’t use the entertainment system but are forced to rate it. In this case, the results are skewed and may lead to incorrect assumptions.

Crew

8.5

Boarding

8.0

Food

7.2

Entertainment

6.3

Overall

8.0

Comfort

7.9

Reviews

1 / 7
10.0
Excellent

Douglas,May 2025

USM - HKG

Flight was as expected: up and down at the right time and location without drama. Kayak needs to modify this survey to allow for “N/A.” For example, we didn’t use the entertainment system but are forced to rate it. In this case, the results are skewed and may lead to incorrect assumptions.

FAQs about flying to Ko Samui

  • What airport do you fly into for flights to Ko Samui?

    Most people fly into Ko Samui (USM) if they book a flight to Ko Samui. Ko Samui is conveniently located just 3.3 km from Ko Samui’s city centre. On average, Ko Samui has 6 flights from Hong Kong per day from 2 airlines.

  • Can I find cheaper flights to Ko Samui if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Ko Samui on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to Ko Samui?

    Based on reviews from Cheapflights users, Bangkok Airways is rated the highest out of the airlines that fly to Ko Samui.

  • Does Ko Samui have rental cars?

    Yes. Those touching down at Ko Samui can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to Ko Samui?

    Yes. Ko Samui has hotels nearby for those requiring accommodations. Diamond Pool Villa Samui is the closest property to Ko Samui (0.0 km away from Ko Samui).

See more FAQs

Travelling to a place near Ko Samui?

Book flights to Ko Samui if you plan to visit one of these locations
Ko Tao
Ko Pha Ngan

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