HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ko Samui

$245+ 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 10/26. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — USM
May 31 — Jun 71
Sun 5/31
Sun 6/7
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Sydney to Ko Samui with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 May 1, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/30. 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.
Sat 6/138:35 pm
SYD
-
USM
1 stop25h 15m
Scoot
Thu 6/188:40 am
USM
-
SYD
1 stop24h 05m
Scoot
Deal found 4/30$580
This CheapOair deal was found by Cheapflights users on 4/30. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/111:00 pm
SYD
-
USM
1 stop32h 50m
Scoot
Thu 6/188:40 am
USM
-
SYD
1 stop31h 40m
Scoot
Deal found 4/30$607
This Mytrip deal was found by Cheapflights users on 4/30. 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 6/138:35 pm
SYD
-
USM
1 stop25h 15m
Multiple Airlines
Thu 6/1812:30 pm
USM
-
SYD
2 stops27h 50m
Multiple Airlines
Deal found 4/30$617
This Mytrip deal was found by Cheapflights users on 4/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/138:35 pm
SYD
-
USM
1 stop25h 15m
Multiple Airlines
Sat 6/203:25 pm
USM
-
SYD
2 stops24h 55m
Multiple Airlines
Deal found 4/28$676
This Kiwi.com deal was found by Cheapflights users on 4/29. 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.
Fri 7/318:35 pm
SYD
-
USM
1 stop25h 15m
Scoot
Fri 8/78:40 am
USM
-
SYD
1 stop24h 05m
Scoot
Deal found 4/29$736
This Mytrip deal was found by Cheapflights users on 4/29. 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.
Fri 7/311:00 pm
SYD
-
USM
1 stop32h 50m
Multiple Airlines
Fri 8/75:55 pm
USM
-
SYD
2 stops22h 25m
Multiple Airlines
Deal found 4/29$745
This CheapOair deal was found by Cheapflights users on 5/1. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/218:35 pm
SYD
-
USM
1 stop23h 45m
Scoot
Sun 6/288:40 am
USM
-
SYD
1 stop31h 40m
Scoot
Deal found 5/1$748
This CheapOair deal was found by Cheapflights users on 5/1. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/98:35 pm
SYD
-
USM
1 stop14h 10m
Scoot
Wed 5/138:40 am
USM
-
SYD
1 stop31h 45m
Scoot
Deal found 5/1$777

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 May 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$580
(Kiwi.com)

One-way from

$245
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$677
Provider with most accurate pricing for Sydney Kingsford Smith-Ko Samui flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sydney Kingsford Smith-Ko Samui flights.
Search Deals
From Sydney Kingsford Smith to Ko Samui
Search Deals
One-way flight from Sydney Kingsford Smith to Ko Samui
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($148 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

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 May 1, 2026.
Use the filters below to find and compare flights from Sydney to Ko Samui that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Sun 6/21

8:35 pm-5:20 pm

1 stop23h 45m

Ko Samui

Sun 6/28

8:40 am-7:20 pm

1 stop31h 40m

$748

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Thu 6/11

8:35 pm-6:50 pm

1 stop25h 15m

Ko Samui

Thu 6/18

8:40 am-11:45 am

1 stop24h 05m

$819

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Sun 6/14

8:35 pm-5:20 pm

1 stop23h 45m

Ko Samui

Sun 6/21

8:40 am-11:45 am

1 stop24h 05m

$966

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Thu 6/11

2:45 pm-6:15 pm

1 stop30h 30m

Ko Samui

Thu 6/18

1:30 pm-9:45 am

2 stops17h 15m

$1,125

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Sat 10/17

11:15 am-12:45 pm

2 stops29h 30m

Ko Samui

Tue 10/20

1:30 pm-9:15 am

2 stops15h 45m

$1,247
Quickest round-trip

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Sat 10/17

6:00 am-9:10 pm

2 stops19h 10m

Ko Samui

Tue 10/20

2:00 pm-7:25 am

1 stop13h 25m

$1,434

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Fri 10/23

6:00 am-8:50 pm

3 stops18h 50m

Ko Samui

Sat 10/31

3:35 pm-10:20 am

2 stops14h 45m

$1,625

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Sun 7/5

6:00 pm-6:50 pm

1 stop27h 50m

Ko Samui

Mon 7/20

8:40 am-10:25 am

1 stop22h 45m

$1,652

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Thu 6/11

8:00 pm-1:45 pm

3 stops20h 45m

Ko Samui

Thu 6/18

3:25 pm-10:00 am

2 stops15h 35m

$1,866
Cheapest one-way

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Mon 10/26

8:05 pm-8:00 am

1 stop15h 55m

$245

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 17 resultsSorted by cheapest first
1
2
  • Most accurate provider: When it comes to deals on Sydney-Ko Samui flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Sydney-Ko Samui flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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?

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 36 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 $493). Flying from Sydney to Ko Samui in December is currently the most expensive (average of $1,035). 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?

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 $748, Scoot can have you in Ko Samui from Sydney in 23h 45m. Airlines will cover a distance of 4495 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 $493). Flying from Sydney to Ko Samui in December is currently the most expensive (average of $1,035). 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

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.

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

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.
Site
©2026 Cheapflights