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$328+ 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 25/8. Fares are subject to change and may not be available on all flights or dates of travel.
— USM
7 Jul — 14 Jul1
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 647,157 searches and data was last updated on 2 July 2025.

Return from

$757

One-way from

$330

Popular in

December

Cheapest in

August

Average price

$1,032
Scoot
  • Scoot
  • 14/8-21/8
  • 2 total stops
  • 46h 50m total
  • Sydney to Ko Samui
Scoot
  • Scoot
  • 21/7
  • 1 total stop
  • 30h 55m total
  • Sydney to Ko Samui
Highest demand for flights based on searches. 15% potential increase in price ($323 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease ($65 potential savings vs. average return price).
Average for return flights in July 2025

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 2 July 2025.

Thu 14/820:45SYD - USM
1 stop23h 00mScoot
Thu 21/808:45USM - SYD
1 stop23h 50mScoot
Deal found 30/6$757
Sat 6/912:50SYD - USM
1 stop32h 40mMultiple Airlines
Sun 14/907:00USM - SYD
2 stops25h 15mMultiple Airlines
Deal found 30/6$769

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 647,157 searches and data was last updated on 2 July 2025.
Use the filters below to find and compare flights to Ko Samui that are best for you.

Fly from

Sydney

Route

Depart

Return

Price

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Thu 14/8

20:45-16:45

1 stop23h 00m

Ko Samui

Thu 21/8

08:45-11:35

1 stop23h 50m

$757

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Sat 6/9

12:50-18:30

1 stop32h 40m

Ko Samui

Sun 14/9

07:00-11:15

2 stops25h 15m

$769

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Mon 25/8

12:50-18:30

1 stop32h 40m

$328

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Sun 26/10

10:15-10:25

2 stops28h 10m

$380

Flights are sorted by cheapest return flights first.

Deals found on 29/6

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 Sydney to Ko Samui. Price data was last updated on 27 June 2025.

Booking 25 days in advance of your planned departure date is, on average, the best time to get cheap flights to Ko Samui. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

How long is the flight to Ko Samui?

On average, a flight from Sydney to Ko Samui takes 22 hours 0 minutes. Flights to Ko Samui from other popular cities in Australia will vary in length. Below are a few examples of popular routes and their flight times.

When is the cheapest time to fly to Ko Samui?

Use this chart to determine the cheapest time to fly return from Sydney to Ko Samui. Price data was last updated on 16 December 2024.

Users looking for the lowest fares to Ko Samui should consider flying on Tuesday at midday, when prices are typically cheapest. Budget-minded travellers will want to avoid Saturday mornings, when prices are usually at their highest.

What are the cheapest airlines that fly to Ko Samui?

The cheapest airlines flying from Sydney to Ko Samui are Scoot, Singapore Airlines and Bangkok Airways.

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 2 July 2025.
Read through reviews of airlines serving Thailand, such as Scoot. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Crew

7.4

Entertainment

5.2

Boarding

6.9

Food

5.7

Comfort

6.6

Overall

6.7

Reviews

1 / 16
4.0
Okay

Anonymous,Mar 2025

CSX - SIN

boarding experience was bad, flight was delayed. was woke up 1 hour prior to arrival to destination saying that we are arriving, mind that it was a overnight flight it surely does not taste well.

Crew

7.4

Entertainment

5.2

Boarding

6.9

Food

5.7

Comfort

6.6

Overall

6.7

Reviews

1 / 16
4.0
Okay

Anonymous,Mar 2025

CSX - SIN

boarding experience was bad, flight was delayed. was woke up 1 hour prior to arrival to destination saying that we are arriving, mind that it was a overnight flight it surely does not taste well.

FAQs about flying to Ko Samui

What is good to know if travelling to Koh Samui?

  • Fisherman’s Village is packed with restaurants, shops, market stalls and bars. There is an Irish bar, naturally, called The Irish Times. The Billabong Surf Club flies the Aussie flag.
  • Hua Thanon is a Muslim village on the south coast. While there are some restaurants and a wonderful beach, seeing the fishermen at work and looking at their beautifully decorated boats is the best thing.
  • The bonus to playing a round of golf on Koh Samui are the beautiful views. The Santiburu Samui Country Club on the north coast is an 18-hole, par-72 course. The Royal Samui Golf and Country Club is located next to Chaweng Beach and will be an 18-hole course. It’s nine holes at present. There are views of Lamai, Cheweng and the surrounding islands.
  • Samui Shooting Sport is close to Chaweng about 200 metres from the Tesco Lotus superstore. It’s a great place to let off some steam with, perhaps, an AK-47. Elephant trekking is a gentler option. It’s a great, slow, way to go into Koh Samaui’s jungly heart.
  • From the pier at Bophut beach you can take a boat to Ko Pha Ngan or take a day trip to the Ang Thong National Marine Park, which consists of 42 limestone islands with soaring mountains, sheer cliffs and dense, green forest.
  • Hin Ta and Hin Yai – Grandfather Rock and Grandmother Rock – provide a quirky photo op. The rocks, south of Chaweng beach, are shaped, suggestively, like male and female genitalia.
  • The Muay Thai stadium in Chaweng town is worth a visit to experience this traditional sport.
  • What airport do you fly into for flights to Ko Samui?

    For a flight to Ko Samui, you will be flying into Ko Samui. Ko Samui (USM) is just 3.3 km from the centre of the city.

  • 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, Scoot is rated the highest out of the airlines that fly to Ko Samui.

  • What is the cheapest airport to fly to in Ko Samui?

    Ko Samui is currently the cheapest airport to fly to in Ko Samui. One-way flights to Ko Samui typically cost $107, while return flights cost around $214.

  • How much is a return flight to Ko Samui?

    A return flight to Ko Samui will typically cost around $244, however they can be found for as little as $141.

  • Where does the fastest flight to Ko Samui depart from?

    For those looking to save time traveling to Ko Samui, Perth offers the quickest one-way flight (10 hours 55 minutes).

  • Does Ko Samui have car hire?

    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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