Australia
AUD

SYD - USM

$459 Find Cheap Flights from Sydney to Ko Samui – Compare and Save

1 adult
1 adult, Economy, 0 bags

Save 20% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest return flight
$867
Typical prices: $1,020-$1,549
Multiple Airlines
Fri 19/10Thu 1/11
SYD - USM • 2 stops
Cheapest one-way flight
$437
Typical prices: $444-$959
Scoot
Mon 19/2
SYD - USM • 1 stop
Direct flights
Not available
There are currently no direct flights between Sydney and Ko Samui. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
21 weeks
in advance
Our data shows that travellers who book at least 21 weeks in advance save around 37% compared to booking last minute.
Insights
Insights
When to travel
August
Cheapest • 20% price drop
May
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
Singapore Changi (SIN)
Cheapest • Avg $1,294 (return)
Bangkok Suvarnabhumi (BKK)
Shortest trip • 13h 36m (one-way)
Insights
Insights
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you enjoy your trip to Ko Samui!
Flight Deals
Booking Insights
Flight Deals

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

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Sydney to Ko Samui

Mon, 19 Oct - Sun, 1 Nov
Multiple Airlines Logo
12:25 - 07:10SYD  Sydney Kingsford Smith-USM Ko Samui
22h 45m2 stops Xiamen Gaoqi Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
07:55 - 10:35USM  Ko Samui-SYD Sydney Kingsford Smith
22h 40m2 stops Bangkok Suvarnabhumi Xiamen Gaoqi Intl
$867Multiple Airlines
Mon, 2 Nov - Fri, 13 Nov
Scoot Logo
20:05 - 10:55SYD  Sydney Kingsford Smith-USM Ko Samui
18h 50m1 stop Singapore Changi
Scoot Logo
12:00 - 18:50USM  Ko Samui-SYD Sydney Kingsford Smith
26h 50m1 stop Singapore Changi
$891Scoot
Mon, 19 Oct - Sun, 1 Nov
Scoot Logo
21:35 - 18:50SYD  Sydney Kingsford Smith-USM Ko Samui
25h 15m1 stop Singapore Changi
Scoot Logo
19:50 - 18:50USM  Ko Samui-SYD Sydney Kingsford Smith
19h 00m1 stop Singapore Changi
$896Scoot
Mon, 19 Oct - Sun, 1 Nov
Multiple Airlines Logo
21:50 - 18:00SYD  Sydney Kingsford Smith-USM Ko Samui
24h 10m2 stops Kuala Lumpur Intl Phuket City
Multiple Airlines Logo
18:05 - 18:50USM  Ko Samui-SYD Sydney Kingsford Smith
20h 45m1 stop Singapore Changi
$897Multiple Airlines
Fri, 22 Jan - Mon, 25 Jan
Thai Airways Logo
10:00 - 20:25SYD  Sydney Kingsford Smith-USM Ko Samui
14h 25m1 stop Bangkok Suvarnabhumi
Thai Airways Logo
18:30 - 11:55USM  Ko Samui-SYD Sydney Kingsford Smith
13h 25m1 stop Bangkok Suvarnabhumi
$1,369Thai Airways
Mon, 18 Jan - Fri, 29 Jan
Thai Airways Logo
15:25 - 07:45SYD  Sydney Kingsford Smith-USM Ko Samui
20h 20m1 stop Bangkok Suvarnabhumi
Thai Airways Logo
19:10 - 11:55USM  Ko Samui-SYD Sydney Kingsford Smith
12h 45m1 stop Bangkok Suvarnabhumi
$1,369Thai Airways
Wed, 28 Oct - Sun, 1 Nov
Qantas Airways Logo
16:10 - 18:15SYD  Sydney Kingsford Smith-USM Ko Samui
30h 05m1 stop Singapore Changi
Qantas Airways Logo
16:25 - 13:25USM  Ko Samui-SYD Sydney Kingsford Smith
17h 00m2 stops Singapore Changi Melbourne
$1,581Qantas Airways
Wed, 28 Oct - Sun, 1 Nov
Qantas Airways Logo
16:10 - 18:15SYD  Sydney Kingsford Smith-USM Ko Samui
30h 05m1 stop Singapore Changi
Qantas Airways Logo
16:25 - 13:25USM  Ko Samui-SYD Sydney Kingsford Smith
17h 00m2 stops Singapore Changi Melbourne
$1,584Qantas Airways
Mon, 18 Jan - Sun, 7 Feb
Singapore Airlines Logo
08:05 - 18:55SYD  Sydney Kingsford Smith-USM Ko Samui
14h 50m1 stop Singapore Changi
Singapore Airlines Logo
08:55 - 07:40USM  Ko Samui-SYD Sydney Kingsford Smith
18h 45m1 stop Singapore Changi
$3,181Singapore Airlines
Mon, 18 Jan - Fri, 5 Feb
Singapore Airlines Logo
08:05 - 18:55SYD  Sydney Kingsford Smith-USM Ko Samui
14h 50m1 stop Singapore Changi
Singapore Airlines Logo
18:05 - 11:50USM  Ko Samui-SYD Sydney Kingsford Smith
13h 45m1 stop Singapore Changi
$3,433Singapore Airlines
Booking Insights

Price, demand, and travel trends for Sydney to Ko Samui flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights with more confidence.

What's the cheapest day of the week to fly from Sydney to Ko Samui?

Based on deals KAYAK users found in the last 12 months, Monday is the cheapest day of the week to fly from Sydney to Ko Samui. It’s 11% cheaper than the average day, while Saturday is the most expensive, with prices 14% higher.

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

•August is the cheapest month to fly from Sydney to Ko Samui at $1,034 return.
•December ($1,955) and January ($1,579) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 89% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Sydney to Ko Samui the cheapest?

Flights from Sydney to Ko Samui are cheapest 21 weeks before departure. Booking in this window typically costs about 37% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Find deals

Key details for Sydney to Ko Samui flights

Low season

February

Cheapest flight

$437
Beat the crowds with an average 46% drop in traveller numbers.
The most popular month to fly with an average 1% increase in traveller numbers.
One-way 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 return price

Your Sydney to Ko Samui flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines, and booking tips.

  • Which cabin classes can I book on flights from Sydney to Ko Samui?

    Three cabin classes are available on flights from Sydney to Ko Samui:

    • Economy class
    • Premium Economy Class
    • Business Class

  • How long is a flight from Sydney to Ko Samui?

    A direct flight from Sydney to Ko Samui takes 00m, covering 11,642 km.

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

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Sydney to Ko Samui flight?

    Return flights from Sydney to Ko Samui range from $1,020 to $1,549, with an average of $1,291 over the past 12 months. Anything below $1,020 counts as a good deal.

  • How expensive are last-minute Sydney to Ko Samui flights?

    Last-minute fares on this route (booked within two weeks of departure) run 3% above the $1,291 route average. Book 21 weeks before departure for the lowest fares.

  • Have flight prices from Sydney to Ko Samui changed much recently?

    Yes. Based on fares seen in the past 5 days, return flight prices on this route showed a wide range, from about $867 to $5,012. That means the highest observed fare was about 6x higher than the lowest one.

  • How are flight prices from Sydney to Ko Samui looking right now?

    One-way fares from Sydney to Ko Samui are currently higher than usual. Average one-way flight prices are about $820, which is 8% above the typical average for this route.

  • Which car hire options are available at Ko Samui Airport (USM)?

    Ko Samui Airport (USM) hosts 5 major car hire companies, with daily rates starting from around $18 for economy cars. Top options include:

    • Drive Car Rental
    • Alamo
    • Sixt
    • Enterprise Rent-A-Car
    • Thai Rent

  • Which airports can I use when flying from Sydney to Ko Samui?

    Flights from Sydney to Ko Samui usually depart from Sydney Kingsford Smith (SYD) and arrive at Ko Samui (USM).

  • Which airports do connecting flights from Sydney to Ko Samui pass through?

    One-stop flights from Sydney to Ko Samui most commonly connect through:

    • Singapore Changi (SIN) – 84% of one-stop connections
    • Bangkok Suvarnabhumi (BKK) – 16% of one-stop connections
    • Hong Kong Intl (HKG) – 0% of one-stop connections

  • Can I save money by using flexible dates for flights from Sydney to Ko Samui?

    Yes. Flexible dates can save you up to 22% on flights from Sydney to Ko Samui. Monday is the cheapest departure day at $1,159 return on average, while Saturday is the most expensive at $1,472, a difference of $313.

    KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different stopover airport from Sydney to Ko Samui?

    Flying via Bangkok Suvarnabhumi (BKK) gives the shortest average 1-stop total travel time of 13h 36m, compared to 14h 32m via Singapore Changi (SIN) and 15h 06m via Hong Kong Intl (HKG).

  • What is the time difference between Sydney and Ko Samui?

    Ko Samui is 4 hours behind Sydney (Indochina Time vs Eastern Australia Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Ko Samui?

    Some of the most popular sights in Ko Samui are Chaweng Beach, Lamai Beach, and Bophut Beach. These are among the most viewed places in Ko Samui on KAYAK.

  • 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.

Your guide to booking Sydney to Ko Samui flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Monday departure and avoid flying on Saturday. On this route, Monday flights average $1,159, about $313 less than Saturday fares (21% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 21 weeks before you fly. On this route, that window historically saves about 37% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Sydney to Ko Samui trip for August. Fares historically average $1,034 return in that month – typically $922 less than the most expensive month, which is December (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Ko Samui Airport.

    • Ozo Chaweng Samui - Sha Extra Plus
    • Amari Koh Samui
    • Melia Koh 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.

More options for your flight from Sydney to Ko Samui

Complete your trip to Ko Samui with a hotel stay or car hire

Car hire in Ko Samui
Hotels in Ko Samui
Holidays in Ko Samui