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Cheap flights from Sydney to Ko Samui from $353

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
27 Nov — 4 Dec1
1 adult
1 adult, Economy, 0 bags

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 28 October 2025.

Round-trip from

$756

One-way from

$478

Popular in

December

Cheapest in

October

Average price

$872
Scoot
  • Scoot
  • 6/3-15/3
  • 2 total stops
  • 62h 25m total
  • Sydney to Ko Samui
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27/11
  • 27/11
  • 2 total stops
  • 36h 45m total
  • Sydney to Ko Samui
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($323 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($65 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find 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 28 October 2025.

Thu 30/1020:05SYD - USM
1 stop15h 55mScoot
Thu 6/1108:55USM - SYD
1 stop29h 55mScoot
Deal found 25/10$669
Mon 27/1020:05SYD - USM
1 stop25h 05mScoot
Sun 9/1108:55USM - SYD
1 stop29h 55mScoot
Deal found 25/10$681
Sat 1/1120:05SYD - USM
1 stop15h 55mScoot
Sat 8/1112:00USM - SYD
1 stop26h 50mScoot
Deal found 27/10$760
Fri 31/1020:05SYD - USM
1 stop26h 45mScoot
Fri 7/1108:55USM - SYD
1 stop29h 55mScoot
Deal found 26/10$762
Wed 26/1121:50SYD - USM
2 stops24h 35mMultiple Airlines
Fri 5/1208:15USM - SYD
2 stops21h 00mMultiple Airlines
Deal found 27/10$848
Thu 6/1120:05SYD - USM
1 stop25h 05mMultiple Airlines
Sun 9/1108:15USM - SYD
2 stops32h 20mMultiple Airlines
Deal found 25/10$860
Wed 26/1120:05SYD - USM
1 stop25h 05mScoot
Wed 3/1219:45USM - SYD
1 stop19h 05mScoot
Deal found 27/10$867
Wed 26/1120:05SYD - USM
1 stop26h 45mScoot
Fri 5/1218:05USM - SYD
1 stop20h 45mScoot
Deal found 27/10$870
Tue 2/1220:05SYD - USM
1 stop15h 55mScoot
Sat 13/1219:45USM - SYD
1 stop19h 05mScoot
Deal found 25/10$883
Mon 1/1214:20SYD - USM
1 stop21h 40mScoot
Mon 8/1208:55USM - SYD
1 stop24h 10mScoot
Deal found 25/10$884
Thu 30/1020:05SYD - USM
1 stop25h 05mMultiple Airlines
Thu 6/1108:15USM - SYD
2 stops24h 50mMultiple Airlines
Deal found 25/10$889

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 28 October 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 26/11

20:05-17:10

1 stop25h 05m

Ko Samui

Wed 3/12

19:45-18:50

1 stop19h 05m

$867

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Thu 27/11

14:20-17:10

1 stop30h 50m

Ko Samui

Fri 5/12

19:45-18:50

1 stop19h 05m

$956

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Thu 27/11

08:25-08:00

2 stops27h 35m

Ko Samui

Thu 4/12

08:15-09:15

2 stops21h 00m

$985

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Sat 14/2

20:05-17:30

2 stops25h 25m

Ko Samui

Sat 28/2

12:00-06:15

3 stops38h 15m

$1,055

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Tue 25/11

21:50-18:25

3 stops24h 35m

Ko Samui

Wed 3/12

17:05-13:05

2 stops16h 00m

$1,095

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Sat 24/1

20:05-18:50

1 stop26h 45m

Ko Samui

Sat 31/1

18:05-06:15

2 stops32h 10m

$1,096

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Tue 9/12

11:55-17:10

3 stops33h 15m

Ko Samui

Tue 16/12

08:15-09:15

2 stops21h 00m

$1,115

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Thu 2/4

13:50-07:50

1 stop22h 00m

Ko Samui

Wed 8/4

08:45-19:30

1 stop31h 45m

$1,162

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Sat 14/2

14:20-17:10

1 stop30h 50m

Ko Samui

Sat 28/2

19:45-18:50

1 stop19h 05m

$1,254

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Thu 2/4

12:15-07:20

2 stops23h 05m

Ko Samui

Thu 9/4

08:45-10:10

2 stops22h 25m

$1,335

Flights are sorted by cheapest return flights first.

Deals found on 25/10

Showing 1-10 of 21 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 24 October 2025.

Booking 48 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, October is the cheapest month in which you can book a flight from Sydney to Ko Samui (average of $629). Flying from Sydney to Ko Samui in December is currently the most expensive (average of $1,061). 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 28 October 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.

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 28 October 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
1,388 reviews
Check prices

Crew

8.6

Boarding

8.3

Overall

8.1

Entertainment

8.0

Food

7.7

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
1,388 reviews
Singapore Airlines
8.1
Very Good
1,388 reviews
Check prices

Crew

8.6

Boarding

8.3

Overall

8.1

Entertainment

8.0

Food

7.7

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
115 reviews
Singapore Airlines
8.1
Very Good
1,388 reviews
Check prices

Crew

8.6

Boarding

8.3

Overall

8.1

Entertainment

8.0

Food

7.7

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
361 reviews
Singapore Airlines
8.1
Very Good
1,388 reviews
Check prices

Crew

8.6

Boarding

8.3

Overall

8.1

Entertainment

8.0

Food

7.7

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
924 reviews
Singapore Airlines
8.1
Very Good
1,388 reviews
Check prices

Crew

8.6

Boarding

8.3

Overall

8.1

Entertainment

8.0

Food

7.7

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
309 reviews
Singapore Airlines
8.1
Very Good
1,388 reviews
Check prices

Crew

8.6

Boarding

8.3

Overall

8.1

Entertainment

8.0

Food

7.7

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 25h 05m. 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 $642, 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.

  • 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 $134 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, October is the cheapest month in which you can book a flight from Sydney to Ko Samui (average of $629). Flying from Sydney to Ko Samui in December is currently the most expensive (average of $1,061). 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 28 October 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 28 October 2025.
AirlineCheapestAverageFlexibilityOn-time
ScootCheapest$642Average$919FlexibilityNo cancel feeOn-timeN/A
Search Scoot flights
Singapore AirlinesCheapest$1,024Average$1,282FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Qantas AirwaysCheapest$1,078Average$1,613FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Bangkok AirwaysCheapest$1,160Average$1,419FlexibilityNo cancel feeOn-time74%
Search Bangkok Airways flights
Thai AirwaysCheapest$1,281Average$1,440FlexibilityNo 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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