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Cheap flights from Sydney to Ko Samui from $335

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 19/10. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — USM
18 juin — 25 juin1
1 adult

Cheap flight deals from Sydney to Ko Samui

Discover tips and strategies to find the most affordable flight options for your journey from Sydney (SYD) to Ko Samui (USM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 13 juin 2025.

Round-trip from

$783

One-way from

$336

Popular in

December

Cheapest in

August

Average price

$1,108
27/8-6/9
  • 27/8-6/9
  • 3 total stops
  • 34h 55m total
  • Sydney to Ko Samui
Scoot
  • Scoot
  • 26/7
  • 1 total stop
  • 30h 35m total
  • Sydney to Ko Samui
Highest demand for flights based on searches. 15% potential increase in price ($326 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease ($66 potential savings vs. average return price).
Average for round-trip flights in June 2025

Find flight deals from Sydney to Ko Samui

Cheapest flights from Sydney to Ko Samui
Explore the most affordable flight options available from Sydney to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 juin 2025.

mer. 27/820:45SYD - USM
1 stop14h 05mMultiple Airlines
sam. 6/908:00USM - SYD
2 stops20h 50mMultiple Airlines
Deal found 12/6$783
ven. 29/812:50SYD - USM
1 stop22h 00mScoot
sam. 30/819:25USM - SYD
1 stop13h 10mScoot
Deal found 12/6$817
dim. 21/1210:00SYD - USM
1 stop30h 00mThai Airways
dim. 4/110:00USM - SYD
1 stop31h 50mThai Airways
Deal found 11/6$1,529
jeu. 4/909:10SYD - USM
3 stops25h 10mCathay Pacific
lun. 15/910:55USM - SYD
2 stops20h 30mCathay Pacific
Deal found 12/6$1,572
jeu. 7/818:05SYD - USM
1 stop27h 25mSingapore Airlines
ven. 22/817:40USM - SYD
1 stop13h 45mSingapore Airlines
Deal found 12/6$1,603

Cheapflights Fare Finder

Customise your flight search to find flights from Sydney to Ko Samui that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 13 juin 2025.
Use the filters below to find and compare flights from Sydney to Ko Samui that are best for you.

Fly from

Sydney

Fly to

Ko Samui

Route

Depart

Return

Price

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

ven. 25/7

12:50-16:45

1 stop30h 55m

Ko Samui

ven. 1/8

19:25-11:35

1 stop13h 10m

$755

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

mer. 27/8

20:45-07:50

1 stop14h 05m

Ko Samui

sam. 6/9

08:00-07:50

2 stops20h 50m

$783

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

dim. 19/10

21:45-07:50

1 stop14h 05m

$335

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

mer. 15/10

10:15-11:55

2 stops29h 40m

$378

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

sam. 26/7

10:15-17:45

3 stops34h 30m

$1,379

Flights are sorted by cheapest return flights first.

Deals found on 10/6

Best time to book a flight from Sydney to Ko Samui

Have a flexible travel schedule? Discover the best time to fly to Ko Samui from Sydney 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 from Sydney to Ko Samui

How far ahead should I book a flight from Sydney 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 9 June 2025.

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

What is the cheapest month to book a flight from Sydney to Ko Samui?

Currently, August is the cheapest month in which you can book a flight from Sydney to Ko Samui (average of $533). Flying from Sydney to Ko Samui in December is currently the most expensive (average of $1,051). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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

Find hourly flight availability from Sydney to Ko Samui. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 13 juin 2025.

It’s optimal to fly from Sydney to Ko Samui in the evening. By choosing this option you can save up to 29% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from Sydney 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.

Travellers seeking maximum savings on their Sydney to Ko Samui flight should consider departing on Tuesday at midday when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 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.

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 13 juin 2025.

Boarding

8.2

Comfort

7.9

Food

7.7

Overall

8.1

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.

Boarding

8.2

Comfort

7.9

Food

7.7

Overall

8.1

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.

Boarding

8.2

Comfort

7.9

Food

7.7

Overall

8.1

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.

Boarding

8.2

Comfort

7.9

Food

7.7

Overall

8.1

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.

Boarding

8.2

Comfort

7.9

Food

7.7

Overall

8.1

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.

Boarding

8.2

Comfort

7.9

Food

7.7

Overall

8.1

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.

Related info for your journey

Find useful and relevant information for your journey from Sydney to Ko Samui. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What are the cheapest airlines flying from Sydney to Ko Samui round-trip?

    Scoot, at $895, was found to be the cheapest airline from Sydney to Ko Samui.Alternate airlines to your destination round-trip include Cathay Pacific and Singapore Airlines. Users have found that Scoot is 22% cheaper than the other options available to this destination.

  • Where are the most common stopover locations when flying from Sydney to Ko Samui?

  • What are some popular things to do or see while on a stopover in Singapore?

    If you're on a stopover in Singapore and looking for things to do, consider visiting Sentosa, Merlion, or Boat Quay. Sentosa, Merlion, and Boat Quay are located about 21.6 km, 16.9 km, and 17.3 km, respectively from Singapore Changi. Travellers can rent a car at Singapore Changi for an average daily rate of $117 to make sightseeing during their stopover a little easier.

  • Where are the least popular stopover locations for Sydney to Ko Samui flights?

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

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

  • How can I find direct flights from Sydney to Ko Samui?

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

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

    Yes. Cheapflights offers flight deals from Sydney 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.

  • What is the cheapest month to book a flight from Sydney to Ko Samui?

    Currently, August is the cheapest month in which you can book a flight from Sydney to Ko Samui (average of $533). Flying from Sydney to Ko Samui in December is currently the most expensive (average of $1,051). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Sydney?

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

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Fly from Sydney to Ko Samui on these airlines

Choose from the following airlines for your flight from Sydney to Ko Samui. Flights are based on user searches made on Cheapflights and were last updated on 13 juin 2025.

Top 5 airlines flying from Sydney to Ko Samui

Discover the top 5 airlines that operate flights from Sydney to Ko Samui. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 13 juin 2025.
AirlineCheapestAverageFlexibilityOn-time
ScootCheapest$642Average$896FlexibilityNo cancel feeOn-timeN/A
Search Scoot flights
Singapore AirlinesCheapest$1,017Average$1,284FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Bangkok AirwaysCheapest$1,178Average$1,365FlexibilityNo cancel feeOn-time74%
Search Bangkok Airways flights
Thai AirwaysCheapest$1,204Average$1,437FlexibilityNo cancel feeOn-time77%
Search Thai Airways flights
Qantas AirwaysCheapest$1,535Average$1,987FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights makes it easy to find Sydney to Ko Samui flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Ko Samui from Sydney.

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

Certainly. Search results for flights to Ko Samui from Sydney 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 Sydney to Ko Samui become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Ko Samui from Sydney today and book when prices fit your budget.

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