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Cheap flights from Sydney to Ko Samui from $399

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 18/10. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — USM
5 Aug — 12 Aug1
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 6 July 2026.

Fri 11/913:00
SYD
-
USM
1 stop32h 50m
Scoot
Mon 21/918:15
USM
-
SYD
1 stop14h 30m
Scoot
Deal found 2/7$762
Fri 4/913:00
SYD
-
USM
2 stops34h 25m
Multiple Airlines
Fri 11/909:15
USM
-
SYD
2 stops31h 05m
Multiple Airlines
Deal found 1/7$770
Thu 20/813:00
SYD
-
USM
1 stop32h 50m
Scoot
Sat 5/918:15
USM
-
SYD
1 stop14h 30m
Scoot
Deal found 5/7$776
Tue 10/1120:05
SYD
-
USM
1 stop25h 05m
Scoot
Wed 18/1108:55
USM
-
SYD
1 stop29h 55m
Scoot
Deal found 4/7$781
Fri 11/913:00
SYD
-
USM
2 stops32h 00m
Multiple Airlines
Mon 21/918:15
USM
-
SYD
1 stop22h 05m
Multiple Airlines
Deal found 3/7$783
Fri 11/920:35
SYD
-
USM
2 stops24h 25m
Multiple Airlines
Sat 19/908:40
USM
-
SYD
1 stop31h 40m
Multiple Airlines
Deal found 1/7$793
Tue 11/820:35
SYD
-
USM
1 stop14h 10m
Scoot
Thu 20/818:15
USM
-
SYD
1 stop22h 05m
Scoot
Deal found 3/7$798
Mon 24/813:00
SYD
-
USM
1 stop32h 50m
Scoot
Mon 31/819:45
USM
-
SYD
1 stop13h 00m
Scoot
Deal found 5/7$802

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 6 July 2026.

Round-trip from

$762

One-way from

$410

Popular in

December

Cheapest in

March

Average price

$1,224
Scoot
  • Scoot
  • 11/9-21/9
  • 2 total stops
  • 47h 20m total
  • Sydney to Ko Samui
Search Deals
Scoot
  • Scoot
  • 2/8
  • 1 total stop
  • 14h 10m total
  • Sydney to Ko Samui
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($204 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($55 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 6 July 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 return flight

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Thu 20/8

13:00-18:50

1 stop32h 50m

Ko Samui

Sat 5/9

18:15-11:45

1 stop14h 30m

$776

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Mon 20/7

20:35-07:45

1 stop14h 10m

Ko Samui

Mon 3/8

08:40-11:45

1 stop24h 05m

$999

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Wed 5/8

20:35-11:55

2 stops18h 20m

Ko Samui

Sun 16/8

19:45-19:20

1 stop20h 35m

$1,054

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Mon 2/11

13:25-17:10

1 stop31h 45m

Ko Samui

Wed 4/11

18:05-18:50

1 stop20h 45m

$1,119
Fastest return journey

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Wed 22/7

13:00-07:45

1 stop21h 45m

Ko Samui

Thu 30/7

19:45-11:45

1 stop13h 00m

$1,185

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Thu 20/8

07:35-18:50

2 stops14h 15m

Ko Samui

Sat 5/9

08:00-11:45

2 stops24h 45m

$1,205

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Wed 19/8

13:00-07:45

1 stop21h 45m

Ko Samui

Wed 26/8

19:45-19:20

1 stop20h 35m

$1,238

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Wed 5/8

11:00-08:15

2 stops24h 15m

Ko Samui

Mon 17/8

15:30-14:05

2 stops19h 35m

$1,460

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Thu 16/7

20:35-18:50

1 stop25h 15m

Ko Samui

Sun 19/7

09:15-06:15

2 stops18h 00m

$1,473

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Wed 22/7

13:00-07:45

1 stop21h 45m

Ko Samui

Thu 30/7

07:30-06:25

2 stops19h 55m

$1,524

Flights are sorted by cheapest return flights first.

Deals found on 4/7

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

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?

Booking 58 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, March is the cheapest month in which you can book a flight from Sydney to Ko Samui (average of $840). Flying from Sydney to Ko Samui in December is currently the most expensive (average of $1,526). 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 for a return flight 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 6 July 2026.
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
8.2
Very Good
1,563 reviews
Check prices

Overall

8.2

Food

7.8

Crew

8.6

Entertainment

8.0

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.
Singapore Airlines
8.2
Very Good
1,563 reviews
Singapore Airlines
8.2
Very Good
1,563 reviews
Check prices

Overall

8.2

Food

7.8

Crew

8.6

Entertainment

8.0

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.
Bangkok Airways
8.1
Very Good
134 reviews
Singapore Airlines
8.2
Very Good
1,563 reviews
Check prices

Overall

8.2

Food

7.8

Crew

8.6

Entertainment

8.0

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.
Thai Airways
7.9
Good
409 reviews
Singapore Airlines
8.2
Very Good
1,563 reviews
Check prices

Overall

8.2

Food

7.8

Crew

8.6

Entertainment

8.0

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.
Qantas Airways
7.5
Good
1,057 reviews
Singapore Airlines
8.2
Very Good
1,563 reviews
Check prices

Overall

8.2

Food

7.8

Crew

8.6

Entertainment

8.0

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.
Scoot
6.7
Okay
325 reviews
Singapore Airlines
8.2
Very Good
1,563 reviews
Check prices

Overall

8.2

Food

7.8

Crew

8.6

Entertainment

8.0

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.

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 32h 50m. 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 $624, was found to be the cheapest airline from Sydney to Ko Samui.Alternate airlines to your destination round-trip include Qantas Airways and Singapore Airlines. Users have found that Scoot is 43% cheaper than the other options available to this destination.

  • 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, March is the cheapest month in which you can book a flight from Sydney to Ko Samui (average of $840). Flying from Sydney to Ko Samui in December is currently the most expensive (average of $1,526). 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 6 July 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 6 July 2026.
AirlineCheapestAverageFlexibilityOn-time
ScootCheapest$628Average$977FlexibilityNo cancel feeOn-timeN/A
Search Scoot flights
Qantas AirwaysCheapest$1,002Average$1,276FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Singapore AirlinesCheapest$1,132Average$1,399FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Bangkok AirwaysCheapest$1,228Average$1,607FlexibilityNo cancel feeOn-time74%
Search Bangkok Airways flights
Thai AirwaysCheapest$1,265Average$1,441FlexibilityNo 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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