SYD - USM

$425 Find Cheap Flights from Sydney to Ko Samui

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Sydney to Ko Samui departing on 5/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Ko Samui

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sydney to Ko Samui, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sydney to Ko Samui, as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$425
Overall average: $677
Scoot
Tue 5/5Tue 5/19
SYD - USM • 1 stop
Cheapest one-way
$1,717
Typical prices: $631-$744
Qantas Airways
Mon 12/29
SYD - USM • 3 stops
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 17% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
October
Cheapest • 20% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Sydney to Ko Samui (SYD-USM)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Sydney to Ko Samui that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Sydney to Ko Samui

Tue, May 5 - Tue, May 19
Scoot Logo
8:50 pm - 7:50 amSYD-USM
14h 00m1 stop
Scoot Logo
7:45 pm - 11:45 amUSM-SYD
13h 00m1 stop
$425Scoot
Find Deal
Mon, May 4 - Mon, May 18
Scoot Logo
8:50 pm - 7:50 amSYD-USM
14h 00m1 stop
Scoot Logo
7:45 pm - 11:45 amUSM-SYD
13h 00m1 stop
$463Scoot
Find Deal
Mon, Mar 2 - Wed, Mar 18
Scoot Logo
8:05 pm - 6:50 pmSYD-USM
26h 45m1 stop
Scoot Logo
8:55 am - 12:20 pmUSM-SYD
23h 25m1 stop
$478Scoot
Find Deal
Tue, May 5 - Mon, May 18
Multiple Airlines Logo
8:50 pm - 7:50 amSYD-USM
14h 00m1 stop
Multiple Airlines Logo
7:00 am - 7:20 amUSM-SYD
21h 20m2 stops
$494Multiple Airlines
Find Deal
Tue, May 5 - Wed, May 20
Multiple Airlines Logo
8:50 pm - 7:50 amSYD-USM
14h 00m1 stop
Multiple Airlines Logo
7:00 am - 7:20 amUSM-SYD
21h 20m2 stops
$498Multiple Airlines
Find Deal
Mon, Mar 2 - Wed, Mar 18
Multiple Airlines Logo
8:05 pm - 6:50 pmSYD-USM
26h 45m1 stop
Multiple Airlines Logo
7:00 am - 8:05 amUSM-SYD
21h 05m2 stops
$528Multiple Airlines
Find Deal
Mon, May 4 - Mon, May 18
Multiple Airlines Logo
8:50 pm - 7:50 amSYD-USM
14h 00m1 stop
Multiple Airlines Logo
7:00 am - 7:20 amUSM-SYD
21h 20m2 stops
$537Multiple Airlines
Find Deal
Mon, May 4 - Wed, May 20
Multiple Airlines Logo
8:50 pm - 7:50 amSYD-USM
14h 00m1 stop
Multiple Airlines Logo
7:00 am - 7:20 amUSM-SYD
21h 20m2 stops
$541Multiple Airlines
Find Deal
Mon, Mar 2 - Mon, Mar 16
Multiple Airlines Logo
8:05 pm - 6:50 pmSYD-USM
26h 45m1 stop
Multiple Airlines Logo
3:50 pm - 12:20 pmUSM-SYD
16h 30m2 stops
$553Multiple Airlines
Find Deal
Wed, Mar 4 - Tue, Mar 17
Scoot Logo
8:05 pm - 6:50 pmSYD-USM
26h 45m1 stop
Scoot Logo
7:45 pm - 6:50 pmUSM-SYD
19h 05m1 stop
$554Scoot
Find Deal
Booking Insights

KAYAK's insights & trends for Sydney to Ko Samui flights

Get data-powered insights and trends into flights from Sydney to Ko Samui to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Sydney to Ko Samui?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Sydney to Ko Samui, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Sydney to Ko Samui is October, where tickets cost $566 (return) on average. On the other hand, the most expensive months are December and January, where the average cost of round-trip tickets is $1,006 and $951 respectively.

How far in advance should I book a flight from Sydney to Ko Samui?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Sydney to Ko Samui, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Sydney to Ko Samui, you should book around 4 weeks before departure, which saves you about 17% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$425
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly with an average 41% increase in price.
Flight from Sydney to Ko Samui

When to book flights from Sydney to Ko Samui

Are your dates flexible? Find out the best times to travel from Sydney to Ko Samui based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Sydney to Ko Samui

  • What is the cabin luggage allowance for Economy flights to Koh Samui (USM) from Sydney (SYD)?

    Your allowable cabin baggage will depend on the airline you book with. For example, Qantas and Thai Airways generally offer a 7 kg carry-on bag plus a small personal item, such as a handbag or laptop bag. Bangkok Airways usually offers a 5 kg carry-on bag and a personal item. Generally speaking, your personal item should be small enough to fit under the seat in front of you.

  • What are the stopover options between Sydney and Koh Samui?

    You’ll generally have at least one stopover before you reach Koh Samui, and some of the most common destinations include Bangkok (BKK), Ho Chi Minh City (SGN), Hong Kong (HKG) and Singapore (SIN). You’ll find plenty of itineraries with carriers like Qantas, Thai Airways and Bangkok Airways that have short stopovers, reducing your overall transit time. However, if you prefer to take a bit of time to stretch your legs between flights, itineraries with longer stops are also available.

  • What is the cheapest flight from Sydney to Ko Samui?

    In the last 3 days, the lowest price for a flight from Sydney to Ko Samui was $1,717 for a one-way ticket and $425 for a round-trip.

  • Do I need a passport to fly between Sydney and Ko Samui?

    A passport is required to fly from Sydney to Ko Samui.

  • Which airports will I be using when flying from Sydney to Ko Samui?

    Sydney and Ko Samui are both served by 1 main airport. You will leave Sydney from Sydney Kingsford Smith and will be arriving at Ko Samui.

  • Which aircraft models fly most regularly from Sydney to Ko Samui?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Sydney to Ko Samui?

    Star Alliance is the only airline alliance operating flights between Sydney and Ko Samui.

  • Which is the best airline for flights from Sydney to Ko Samui, Singapore Airlines or Scoot?

    The two airlines most popular with KAYAK users for flights from Sydney to Ko Samui are Singapore Airlines and Scoot. With an average price for the route of $819 and an overall rating of 8.1, Singapore Airlines is the most popular choice. Scoot is also a great choice for the route, with an average price of $643 and an overall rating of 6.7.

  • How does KAYAK find such low prices on flights from Sydney to Ko Samui?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Sydney to Ko Samui.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Sydney to Ko Samui?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ko Samui from Sydney is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Sydney to Ko Samui?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ko Samui with an airline and back to Sydney with another airline. Booking your flights between Sydney and USM can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Sydney to Ko Samui?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ko Samui from Sydney up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Sydney to Ko Samui

  • Sydney Airport (SYD) is a hub for Australia’s three major airlines – Qantas, Virgin and Jetstar – all of which operate both domestic and international flights. Samui International Airport (USM) features a unique, open-air layout and is a focus city for Bangkok Airways.
  • If you’d like to have a checked bag included in your fare, consider full-service carriers like Qantas, Bangkok Airways and Thai Airways, which generally offer a free 30 kg checked bag to Economy passengers. Note that low-cost carriers like Scoot often don’t include checked baggage in the Basic Economy fare.
  • If you value the additional space and Priority service of Premium Economy, look for flights with Qantas, Bangkok Airways, Singapore Airlines and Thai Airways. Note that some fares are mixed, meaning you may have a Premium Economy seat on one leg but not on another. If you want to enjoy the Premium experience all the way, you can check whether an itinerary is mixed or completely Premium when searching for flights through KAYAK.

Reviews of the top airlines flying from Sydney to Ko Samui

 
See real verified KAYAK customer reviews for airlines flying from Sydney to Ko Samui. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Sydney to Ko Samui? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.1
Singapore AirlinesOverall score based on 1411 reviews
7.8Food
8.0Comfort
8.0Entertainment
8.3Boarding
8.6Crew
Airline reviews

Pleasant business class flight experience with good onboarding experience. Flight service team was excellent with usual book-the-chef menu available

8.0 ExcellentWee Keng, Nov 2025ICN - SIN
Read more Singapore Airlines reviews

Pleasant business class flight experience with good onboarding experience. Flight service team was excellent with usual book-the-chef menu available

The consistency with Singapore Airlines is fantastic. Crew are always brilliant and food delicious in business class

Wish the seat don’t have restrictions, can’t fully insert backpack all the way inside.

Service was top notch and the attention to passengers is great. Takeoff and landing was on schedule. Food selection is good

I have difficulties to book wheelchair for my parents returned flight

Lounge a access was excellent as was the attentiveness and service from the crew as always. The food and drink supplied were of good quality. The entertainment system had a good selection and I liked the mapping system supplied. However the screen wild have been bigger and the operation a little smoother to navigate. The seats were barely comfortable, but adequate.

Headwind delayed our flight which wasn’t the airlines fault

Both the staff at check-in counter and on board were pleasant and helpful. My chicken and mashed potato was good, sauce was tasty, but the zucchini, carrot n other accompanying vegetables were over-cooked a little. (I understand the meal has to be prepared earlier). Yet I would fly on Singapore Airlines again and recommend it to family and friends.

Horrendous. We upgraded and they took the money but cancelled one of our tickets. The recline action didn’t work on the seats for the flight from Singapore to London, pre booked meals but they seemed to have disappeared as well.. Phone customer service was horrendous. Took 5 phone calls and no fix. Craig at the airport was the only one who seemed to be able to get the ticket back.

Very good flight from Boarding to landing -efficient and comfortable with decent entertainment options

Uncoordinated boarding, seat comfort is terrible, even toilet is so small that overweight people wouldn't fit in. Baggage scam with additional fees. Stay away from this airline.

Forthright communication to the customers regarding services offered and any fees involved.

Scoot is a no frills budget airline. Do not expect a legacy airline experience.

I have taken more than 50 flights in the past year and this is the worst onboard experience that I've come across. There's always a risk with budget airlines and their creative views of customer service. Having bought a standard seat, we boarded at the assigned seat - we naturally couldn't choose ourselves as that would be extra cost. After take-off, the person in the row in front leans back their seat. As a frequent flyer, I believe this is their right, so I try to lean my seat back as well to have the same space available. However, my standard seat could not lean back, as the row behind was an exit row. As I had paid for a standard seat, not a less space than standard, I moved to the completely free row behind me. This was not allowed, as due to extra legroom, this would cost extra. Subsequently spent the next 30 mins discussing this scenario with the crew. I have no issues with budget airlines and additional charges, but if I pay for a standard seat, I want a standard seat, not one with less space. As you do not offer me a discount for the less space, do not try and charge me a premium, when I find a free seat with more space. It works both ways Scoot.

Finishes were quite worn, including our very scratched up seatback. No entertainment available, and the WiFi (even for “ScootHub”) was very slow. Crew were somewhat friendly.

Food & lower the prices. Look at Air Asia food look better & affordable

Not a frequent user of their website booking. Booked my check-in baggage and only realized that I did not book my check in baggage for return flight. The receipt was not clear in identifying that as well. Was charged exorbitantly at check in counter. Bad taste for sure when it is a business trip and not leisure trip. Baggage was delayed for more than an hour at belt back in SG.

Boarding took forever. It's also weird that we paid more (for preferred seats) to get on the plane last. Inflight WiFi never worked the entire trip. I want my money back.

The cosmetic condition was pretty run down. The carpets were badly worn out. Even the paint on the wings was chipped and peeled! Looks like they are running these 787s to the ground..

WiFi didn’t work on both sectors so made killing time harder - planes clean modern and good flight crew - would do again if WiFi works

Everything you need to know for your flight from Sydney to Ko Samui

Information on your arrival and departure airports