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Cheap flights from Sydney to Ko Samui from $294

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 15/9. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — USM
16 Jul — 23 Jul1
1 adult

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 11 July 2025.

Round-trip from

$747

One-way from

$294

Popular in

December

Cheapest in

August

Average price

$1,034
Scoot
  • Scoot
  • 9/8-13/9
  • 2 total stops
  • 56h 10m total
  • Sydney to Ko Samui
Scoot
  • Scoot
  • 15/9
  • 1 total stop
  • 32h 40m total
  • Sydney to Ko Samui
Highest demand for flights based on searches. 15% potential increase in price ($325 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease ($65 potential savings vs. average return price).
Average for round-trip flights in July 2025

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 11 July 2025.

Sun 9/1121:45SYD - USM
1 stop14h 15mMultiple Airlines
Thu 20/1112:15USM - SYD
2 stops20h 35mMultiple Airlines
Deal found 9/7$736
Sat 9/813:10SYD - USM
1 stop32h 20mScoot
Sat 13/908:45USM - SYD
1 stop23h 50mScoot
Deal found 9/7$747

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 11 July 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

Sun 9/11

21:45-08:00

1 stop14h 15m

Ko Samui

Thu 20/11

12:15-12:50

2 stops20h 35m

$736

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Sat 9/8

13:10-18:30

1 stop32h 20m

Ko Samui

Sat 13/9

08:45-11:35

1 stop23h 50m

$747

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Mon 15/9

12:50-18:30

1 stop32h 40m

$294

SydneyKo Samui

SYD - USM

SYDUSM

Sydney Kingsford Smith

Mon 15/9

20:45-18:00

2 stops24h 15m

$356

Flights are sorted by cheapest return flights first.

Deals found on 10/7

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 27 June 2025.

Booking 25 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, August is the cheapest month in which you can book a flight from Sydney to Ko Samui (average of $533). Flying from Sydney to Ko Samui in December is currently the most expensive (average of $1,051). 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 11 July 2025.

It’s optimal to fly from Sydney to Ko Samui in the evening. By choosing this option you can save up to 29% 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.

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 11 July 2025.
Read through reviews of airlines operating flights from Sydney to Ko Samui, such as Cathay Pacific and Scoot. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Crew

8.0

Overall

7.6

Entertainment

7.8

Boarding

7.9

Comfort

7.6

Food

7.3

Reviews

1 / 20
10.0
Excellent

Douglas,June 2025

MNL - HKG

Flight attendant was very helpful in finding something simple to eat as opposed to a full meal. I appreciated her efforts to make it a comfortable flight.

Crew

8.0

Overall

7.6

Entertainment

7.8

Boarding

7.9

Comfort

7.6

Food

7.3

Reviews

1 / 20
10.0
Excellent

Douglas,June 2025

MNL - HKG

Flight attendant was very helpful in finding something simple to eat as opposed to a full meal. I appreciated her efforts to make it a comfortable flight.

Crew

8.0

Overall

7.6

Entertainment

7.8

Boarding

7.9

Comfort

7.6

Food

7.3

Reviews

1 / 20
10.0
Excellent

Douglas,June 2025

MNL - HKG

Flight attendant was very helpful in finding something simple to eat as opposed to a full meal. I appreciated her efforts to make it a comfortable flight.

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.
  • What is the cheapest airline to fly from Sydney to Ko Samui round-trip?

    Scoot, at $747, was found to be the cheapest airline from Sydney to Ko Samui.. Users have found that Scoot is 34% cheaper than the other options available to this destination.

  • Where are the most common stopover locations when flying from Sydney to Ko Samui?

  • 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 Boat Quay. Sentosa, Merlion, and Boat Quay are located about 21.6 km, 16.9 km, and 17.3 km, respectively from Singapore Changi. Travellers can rent a car at Singapore Changi for an average daily rate of $127 to make sightseeing during their stopover a little easier.

  • Where are the least popular stopover locations for Sydney to Ko Samui flights?

  • 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, August is the cheapest month in which you can book a flight from Sydney to Ko Samui (average of $533). Flying from Sydney to Ko Samui in December is currently the most expensive (average of $1,051). 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 Sydney?

Book flights to Sydney if you plan to visit one of these locations
Ko Tao
Ko Pha Ngan

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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 11 July 2025.

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 11 July 2025.
AirlineCheapestAverageFlexibilityOn-time
ScootCheapest$643Average$894FlexibilityNo cancel feeOn-timeN/A
Search Scoot flights
Singapore AirlinesCheapest$1,014Average$1,274FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Bangkok AirwaysCheapest$1,166Average$1,371FlexibilityNo cancel feeOn-time74%
Search Bangkok Airways flights
Thai AirwaysCheapest$1,184Average$1,427FlexibilityNo cancel feeOn-time77%
Search Thai Airways flights
Qantas AirwaysCheapest$1,523Average$1,972FlexibilityNo cancel feeOn-time74%
Search Qantas 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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