Find flights
When to book
Airlines
FAQs

Cheap flights from Sydney to Ko Samui from $351

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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — USM
21 Feb — 28 Feb1
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 22 January 2026.

Mon 2/320:05
SYD
-
USM
1 stop26h 45m
Scoot
Fri 13/308:55
USM
-
SYD
1 stop29h 55m
Scoot
Deal found 20/1$674
Fri 6/320:05
SYD
-
USM
1 stop25h 05m
Scoot
Fri 13/308:55
USM
-
SYD
1 stop29h 55m
Scoot
Deal found 20/1$684
Thu 4/613:00
SYD
-
USM
1 stop21h 45m
Scoot
Sat 6/608:40
USM
-
SYD
1 stop31h 55m
Scoot
Deal found 20/1$758
Sun 7/620:50
SYD
-
USM
1 stop13h 55m
Scoot
Sun 28/608:40
USM
-
SYD
1 stop31h 55m
Scoot
Deal found 20/1$764
Tue 17/320:05
SYD
-
USM
1 stop15h 55m
Scoot
Tue 24/308:55
USM
-
SYD
1 stop23h 25m
Scoot
Deal found 20/1$767
Fri 17/720:50
SYD
-
USM
1 stop13h 55m
Scoot
Mon 3/819:45
USM
-
SYD
1 stop13h 00m
Scoot
Deal found 20/1$774
Thu 19/320:05
SYD
-
USM
1 stop25h 05m
Scoot
Sun 29/308:40
USM
-
SYD
1 stop31h 55m
Scoot
Deal found 20/1$776
Tue 13/1021:50
SYD
-
USM
1 stop25h 00m
Scoot
Fri 16/1011:05
USM
-
SYD
1 stop29h 30m
Scoot
Deal found 19/1$782
Thu 4/613:00
SYD
-
USM
2 stops33h 10m
Multiple Airlines
Sun 7/607:50
USM
-
SYD
2 stops20h 30m
Multiple Airlines
Deal found 20/1$807
Tue 19/513:00
SYD
-
USM
1 stop21h 45m
Multiple Airlines
Mon 1/607:50
USM
-
SYD
2 stops20h 30m
Multiple Airlines
Deal found 19/1$816
Sun 8/320:05
SYD
-
USM
1 stop15h 55m
Scoot
Sun 15/319:45
USM
-
SYD
1 stop19h 05m
Scoot
Deal found 22/1$825
Mon 8/613:00
SYD
-
USM
1 stop32h 50m
Scoot
Mon 15/608:40
USM
-
SYD
1 stop31h 55m
Scoot
Deal found 21/1$829

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 22 January 2026.

Round-trip from

$674

One-way from

$351

Popular in

December

Cheapest in

October

Average price

$1,342
Scoot
  • Scoot
  • 2/3-13/3
  • 2 total stops
  • 56h 40m total
  • Sydney to Ko Samui
Search Deals
Scoot
  • Scoot
  • 29/1
  • 1 total stop
  • 22h 25m total
  • Sydney to Ko Samui
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($282 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($59 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
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 22 January 2026.
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

Fri 6/3

20:05-18:50

1 stop26h 45m

Ko Samui

Fri 13/3

08:55-18:50

1 stop29h 55m

$674

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Wed 3/6

13:00-07:45

1 stop21h 45m

Ko Samui

Sat 6/6

08:40-19:35

1 stop31h 55m

$758

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Wed 3/6

13:00-07:45

1 stop21h 45m

Ko Samui

Sun 7/6

08:40-19:35

1 stop31h 55m

$758

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Thu 4/6

13:00-07:45

1 stop21h 45m

Ko Samui

Sun 7/6

08:40-19:35

1 stop31h 55m

$758

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Sun 7/6

20:50-07:45

1 stop13h 55m

Ko Samui

Sun 28/6

08:40-19:35

1 stop31h 55m

$764

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Tue 17/3

20:05-08:00

1 stop15h 55m

Ko Samui

Tue 24/3

08:55-12:20

1 stop23h 25m

$767

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Thu 4/6

13:00-19:10

2 stops33h 10m

Ko Samui

Sun 7/6

07:50-07:20

2 stops20h 30m

$807

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Tue 19/5

13:00-07:45

1 stop21h 45m

Ko Samui

Mon 1/6

07:50-07:20

2 stops20h 30m

$816

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Sun 8/3

20:05-08:00

1 stop15h 55m

Ko Samui

Sun 15/3

19:45-18:50

1 stop19h 05m

$825

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Wed 3/6

13:00-19:10

2 stops33h 10m

Ko Samui

Sun 7/6

07:50-07:20

2 stops20h 30m

$862

Flights are sorted by cheapest return flights first.

Deals found on 20/1

Showing 1-10 of 23 results
1
2
3

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 16 January 2026.

Booking 50 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 $597). Flying from Sydney to Ko Samui in December is currently the most expensive (average of $1,013). 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.

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 22 January 2026.
Read through reviews of airlines operating flights from Sydney to Ko Samui, such as Bangkok Airways, Singapore Airlines, andThai Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Bangkok Airways
8.1
Very Good
120 reviews
Check prices

Boarding

8.1

Overall

8.1

Entertainment

6.3

Comfort

8.0

Crew

8.6

Food

7.3

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.
Bangkok Airways
8.1
Very Good
120 reviews
Bangkok Airways
8.1
Very Good
120 reviews
Check prices

Boarding

8.1

Overall

8.1

Entertainment

6.3

Comfort

8.0

Crew

8.6

Food

7.3

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.
Singapore Airlines
8.1
Very Good
1,434 reviews
Bangkok Airways
8.1
Very Good
120 reviews
Check prices

Boarding

8.1

Overall

8.1

Entertainment

6.3

Comfort

8.0

Crew

8.6

Food

7.3

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.
Thai Airways
7.8
Good
379 reviews
Bangkok Airways
8.1
Very Good
120 reviews
Check prices

Boarding

8.1

Overall

8.1

Entertainment

6.3

Comfort

8.0

Crew

8.6

Food

7.3

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.
Qantas Airways
7.5
Good
973 reviews
Bangkok Airways
8.1
Very Good
120 reviews
Check prices

Boarding

8.1

Overall

8.1

Entertainment

6.3

Comfort

8.0

Crew

8.6

Food

7.3

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.
Scoot
6.7
Okay
315 reviews
Bangkok Airways
8.1
Very Good
120 reviews
Check prices

Boarding

8.1

Overall

8.1

Entertainment

6.3

Comfort

8.0

Crew

8.6

Food

7.3

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.

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 26h 45m. 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 $616, 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 41% 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 $308 on Scoot. Other airlines that offer cheap prices include Singapore Airlines from $634 and Thai Airways 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, Universal Studios Singapore, or Merlion. Sentosa, Universal Studios Singapore, and Merlion are located about 21.6 km, 21.6 km, and 16.9 km, respectively from Singapore Changi. Travellers can rent a car at Singapore Changi for an average daily rate of $121 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 $597). Flying from Sydney to Ko Samui in December is currently the most expensive (average of $1,013). 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

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

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 22 January 2026.
Singapore Airlines flights from Sydney Kingsford Smith to Ko Samui
Qantas Airways flights from Sydney Kingsford Smith to Ko Samui
Bangkok 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 22 January 2026.
AirlineCheapestAverageFlexibilityOn-time
ScootCheapest$616Average$868FlexibilityNo cancel feeOn-timeN/A
Search Scoot flights
Singapore AirlinesCheapest$978Average$1,263FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Qantas AirwaysCheapest$1,046Average$1,510FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Bangkok AirwaysCheapest$1,125Average$1,459FlexibilityNo cancel feeOn-time74%
Search Bangkok Airways flights
Thai AirwaysCheapest$1,242Average$1,397FlexibilityNo 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.