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Cheap flights from Sydney to Ko Samui from $352

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 26/1. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — USM
10 Jan — 17 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Sydney to Ko Samui

Enter your travel dates to find the best prices.

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 11 December 2025.

Thu 11/1209:00SYD - USM
3 stops27h 00mMultiple Airlines
Wed 17/1208:15USM - SYD
2 stops21h 00mMultiple Airlines
Deal found 10/12$1,151
Sun 14/1221:50SYD - USM
3 stops25h 00mMultiple Airlines
Sun 21/1212:00USM - SYD
1 stop26h 50mMultiple Airlines
Deal found 9/12$1,352
Sun 14/1213:35SYD - USM
1 stop22h 25mScoot
Sun 21/1219:45USM - SYD
1 stop19h 05mScoot
Deal found 9/12$1,363
Thu 11/1220:05SYD - USM
1 stop15h 55mScoot
Wed 17/1218:05USM - SYD
1 stop20h 45mScoot
Deal found 10/12$1,366
Mon 15/1206:30SYD - USM
3 stops40h 20mMultiple Airlines
Mon 22/1209:20USM - SYD
2 stops19h 55mMultiple Airlines
Deal found 10/12$1,378
Fri 12/1207:15SYD - USM
2 stops31h 45mMultiple Airlines
Fri 19/1208:15USM - SYD
2 stops21h 00mMultiple Airlines
Deal found 10/12$1,384

Find 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 11 December 2025.

Round-trip from

$701

One-way from

$352

Popular in

December

Cheapest in

October

Average price

$1,508
Scoot
  • Scoot
  • 4/3-2/4
  • 2 total stops
  • 49h 05m total
  • Sydney to Ko Samui
Search Deals
Scoot
  • Scoot
  • 26/1
  • 1 total stop
  • 15h 55m total
  • Sydney to Ko Samui
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($297 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($63 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 11 December 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

Wed 4/3

20:05-18:50

1 stop26h 45m

Ko Samui

Thu 2/4

12:30-09:20

2 stops16h 50m

$800

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Sun 25/1

20:05-08:00

1 stop15h 55m

Ko Samui

Sun 1/2

18:05-06:15

2 stops32h 10m

$1,081

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Fri 23/1

20:05-08:00

1 stop15h 55m

Ko Samui

Tue 27/1

08:55-20:35

2 stops31h 40m

$1,146

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Thu 29/1

20:05-08:00

1 stop15h 55m

Ko Samui

Sun 8/2

18:05-12:20

1 stop14h 15m

$1,182

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Fri 23/1

13:35-08:05

2 stops22h 30m

Ko Samui

Sun 1/2

08:55-10:15

3 stops21h 20m

$1,211

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Wed 21/1

20:05-08:00

1 stop15h 55m

Ko Samui

Wed 28/1

08:55-12:20

1 stop23h 25m

$1,241

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Thu 22/1

20:05-18:50

1 stop26h 45m

Ko Samui

Wed 28/1

08:55-12:20

1 stop23h 25m

$1,281

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Wed 21/1

20:05-08:00

1 stop15h 55m

Ko Samui

Wed 28/1

18:05-09:15

2 stops35h 10m

$1,287

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Wed 21/1

20:05-08:00

1 stop15h 55m

Ko Samui

Tue 27/1

08:55-12:20

1 stop23h 25m

$1,293

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Fri 23/1

20:05-08:00

1 stop15h 55m

Ko Samui

Tue 27/1

18:05-18:50

1 stop20h 45m

$1,307

Flights are sorted by cheapest return flights first.

Deals found on 8/12

Showing 1-10 of 22 results
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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 5 December 2025.

Booking 59 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, November is the cheapest month in which you can book a flight from Sydney to Ko Samui (average of $605). Flying from Sydney to Ko Samui in December is currently the most expensive (average of $1,032). 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 11 December 2025.

It’s optimal to fly from Sydney to Ko Samui in the evening. By choosing this option you can save up to 28% 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.

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 11 December 2025.
Read through reviews of airlines operating flights from Sydney to Ko Samui, such as Singapore Airlines, Bangkok Airways, andThai Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.1
Very Good
1,412 reviews
Check prices

Overall

8.1

Crew

8.6

Boarding

8.3

Food

7.8

Entertainment

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,July 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Singapore Airlines
8.1
Very Good
1,412 reviews
Singapore Airlines
8.1
Very Good
1,412 reviews
Check prices

Overall

8.1

Crew

8.6

Boarding

8.3

Food

7.8

Entertainment

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,July 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Bangkok Airways
8.0
Very Good
118 reviews
Singapore Airlines
8.1
Very Good
1,412 reviews
Check prices

Overall

8.1

Crew

8.6

Boarding

8.3

Food

7.8

Entertainment

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,July 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Thai Airways
7.8
Good
366 reviews
Singapore Airlines
8.1
Very Good
1,412 reviews
Check prices

Overall

8.1

Crew

8.6

Boarding

8.3

Food

7.8

Entertainment

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,July 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Qantas Airways
7.5
Good
947 reviews
Singapore Airlines
8.1
Very Good
1,412 reviews
Check prices

Overall

8.1

Crew

8.6

Boarding

8.3

Food

7.8

Entertainment

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,July 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Scoot
6.7
Okay
311 reviews
Singapore Airlines
8.1
Very Good
1,412 reviews
Check prices

Overall

8.1

Crew

8.6

Boarding

8.3

Food

7.8

Entertainment

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,July 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered

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.

  • How long is the flight from Sydney to Ko Samui?

    Scoot can get you from Sydney to Ko Samui in just under 15h 55m. Your travel time can differ by up to . The distance from Sydney to Ko Samui is about 7234 km.

  • What are the cheapest airlines flying from Sydney to Ko Samui round-trip?

    Scoot, at $628, was found to be the cheapest airline from Sydney to Ko Samui.Alternate airlines to your destination round-trip include Singapore Airlines and Qantas Airways. Users have found that Scoot is 40% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Sydney to Ko Samui one-way?

    One-way options have recently been found by users for as low as $321 on Scoot. Other airlines that offer cheap prices include Thai Airways from $593 and Singapore Airlines from $644 one-way.

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

    Of the flights from Sydney to Ko Samui that have stopovers, most of them stop in Singapore.

  • 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 Sim Lim Square. Sentosa, Merlion, and Sim Lim Square are located about 21.6 km, 16.9 km, and 16.3 km, respectively from Singapore Changi. Travellers can rent a car at Singapore Changi for an average daily rate of $130 to make sightseeing during their stopover a little easier.

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

    Flights departing from Sydney and landing in Ko Samui stopover in Bangkok least frequently.

  • 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, November is the cheapest month in which you can book a flight from Sydney to Ko Samui (average of $605). Flying from Sydney to Ko Samui in December is currently the most expensive (average of $1,032). 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 Ko Samui?

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

Browse thousands of different options on Cheapflights for your next trip

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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 11 December 2025.
Singapore Airlines flights from Sydney Kingsford Smith to Ko Samui
Bangkok Airways flights from Sydney Kingsford Smith to Ko Samui
Qantas Airways flights from Sydney Kingsford Smith to Ko Samui

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 11 December 2025.
AirlineCheapestAverageFlexibilityOn-time
ScootCheapest$629Average$885FlexibilityNo cancel feeOn-timeN/A
Search Scoot flights
Singapore AirlinesCheapest$990Average$1,257FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Qantas AirwaysCheapest$1,062Average$1,544FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Bangkok AirwaysCheapest$1,141Average$1,356FlexibilityNo cancel feeOn-time74%
Search Bangkok Airways flights
Thai AirwaysCheapest$1,262Average$1,428FlexibilityNo cancel feeOn-time77%
Search Thai 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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