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Ko Samui

$338+ Cheap flights from Sydney (SYD) to Ko Samui (USM)

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 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — USM
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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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 October 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$579
(Booking.com)

Popular in

December

Cheapest in

October

Average price

$571
Provider with most accurate pricing for Sydney Kingsford Smith-Ko Samui flight deals.
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Provider most trusted by Cheapflights users for Sydney Kingsford Smith-Ko Samui flights.
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From Sydney Kingsford Smith to Ko Samui
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($139 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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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 October 29, 2025.

This Booking.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/12:20 pmSYD - USM
1 stop21h 40mScoot
Mon 12/157:45 pmUSM - SYD
1 stop19h 05mScoot
Deal found 10/28$579
This Kiwi.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/18:25 amSYD - USM
2 stops51h 35mMultiple Airlines
Mon 12/158:55 amUSM - SYD
1 stop29h 55mMultiple Airlines
Deal found 10/28$642
This Mytrip deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/279:00 pmSYD - USM
2 stops26h 50mMultiple Airlines
Sun 1/48:15 amUSM - SYD
2 stops33h 35mMultiple Airlines
Deal found 10/27$1,372
This Mytrip deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2111:10 amSYD - USM
3 stops33h 30mMultiple Airlines
Sun 1/48:15 amUSM - SYD
2 stops23h 40mMultiple Airlines
Deal found 10/27$1,445
This Mytrip deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2012:45 pmSYD - USM
2 stops33h 30mMultiple Airlines
Sun 1/48:15 amUSM - SYD
2 stops23h 40mMultiple Airlines
Deal found 10/27$1,507

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated October 29, 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

Mon 12/1

2:20 pm-8:00 am

1 stop21h 40m

Ko Samui

Mon 12/15

7:45 pm-6:50 pm

1 stop19h 05m

$579

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Mon 12/1

8:25 am-8:00 am

2 stops51h 35m

Ko Samui

Mon 12/15

8:55 am-6:50 pm

1 stop29h 55m

$642

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Sun 4/5

12:50 pm-6:30 pm

1 stop32h 40m

Ko Samui

Sat 4/11

8:45 am-7:30 pm

1 stop31h 45m

$848

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Fri 3/20

8:05 pm-8:00 am

1 stop15h 55m

Ko Samui

Mon 3/23

7:45 pm-1:05 pm

1 stop13h 20m

$881

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Sun 4/5

9:45 am-1:55 pm

2 stops31h 10m

Ko Samui

Sat 4/11

8:45 am-9:45 am

2 stops22h 00m

$919

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Sun 3/22

8:05 pm-11:00 am

1 stop18h 55m

Ko Samui

Mon 3/23

7:45 pm-1:05 pm

1 stop13h 20m

$924

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Mon 12/1

8:25 am-5:10 pm

2 stops36h 45m

$338

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Mon 12/1

2:20 pm-8:00 am

1 stop21h 40m

$349

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Sat 11/15

8:05 pm-11:00 am

1 stop18h 55m

$397

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Sat 12/27

9:00 pm-7:50 pm

2 stops26h 50m

$673

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 14 results
1
2

Compare providers for flights from Sydney to Ko Samui

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Sydney to Ko Samui in October.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Sydney-Ko Samui flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Sydney-Ko Samui flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Sydney-Ko Samui flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Sydney-Ko Samui flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Sydney-Ko Samui flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip 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 round-trip flight from Sydney to Ko Samui. Price data was last updated on October 24, 2025.

The price you pay for your flight from Sydney to Ko Samui may vary depending on when you book. For the best chance of a lower fare, look to book 48 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, October is the cheapest month in which you can book a flight from Sydney to Ko Samui (average of $412). Flying from Sydney to Ko Samui in December is currently the most expensive (average of $695). 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.

How much does it cost to fly round-trip from Sydney to Ko Samui?

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 October 29, 2025.
Get a feel of what it's like to fly with Singapore Airlines and Scoot from Sydney to Ko Samui by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.1
Very good
1,388 reviews

Crew

8.6

Overall

8.1

Food

7.7

Comfort

8.0

Boarding

8.3

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 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
1,388 reviews
Singapore Airlines
8.1
Very good
1,388 reviews

Crew

8.6

Overall

8.1

Food

7.7

Comfort

8.0

Boarding

8.3

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 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
309 reviews
Singapore Airlines
8.1
Very good
1,388 reviews

Crew

8.6

Overall

8.1

Food

7.7

Comfort

8.0

Boarding

8.3

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 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?

    For as low as $579, Scoot can have you in Ko Samui from Sydney in 21h 40m. Airlines will cover a distance of 4495 mi.

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

    Our cheapest airline available from Sydney to Ko Samui is Scoot. Our recent data shows that you can find tickets from as low as $498 on this airline. An additional option worth looking into is Singapore Airlines, starting at $723. Scoot is currently priced 31% below the average price you’ll pay for this route.

  • 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 vacation 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, October is the cheapest month in which you can book a flight from Sydney to Ko Samui (average of $412). Flying from Sydney to Ko Samui in December is currently the most expensive (average of $695). 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

Traveling 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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Alternative routes for Sydney to Ko Samui

See prices for flight routes from nearby airports that may be better suited for you.
Sydney to Suvarnabhumi flights
Sydney to Phuket City flights
Sydney to Chiang Mai flights

Top 2 airlines flying from Sydney to Ko Samui

Discover the top 2 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 2,558,603 searches. Data last updated October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
ScootCheapest$498Average$835FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$723Average$819FlexibilityNo cancel feeOn-time81%

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