SYD - USM

$309 Find Cheap Flights from Sydney to Ko Samui - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$656
Typical prices: $710-$1,078
Scoot
Sat 3/31Wed 4/4
SYD - USM • 1 stop
Cheapest one-way
$309
Typical prices: $309-$667
Scoot
Mon 4/2
SYD - USM • 1 stop
Nonstop 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 travelers 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 layover airports
Singapore Changi (SIN)
Cheapest • Avg $900 (round-trip)
Bangkok Suvarnabhumi (BKK)
Shortest trip • 13h 36m (one-way)
Insights
Insights
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We hope you love 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 round-trip flight deals from Sydney to Ko Samui

Wed, Mar 31 - Sun, Apr 4
Scoot Logo
9:35 pm - 6:50 pmSYD  Sydney Kingsford Smith-USM Ko Samui
25h 15m1 stop Singapore Changi
Scoot Logo
8:40 am - 7:20 pmUSM  Ko Samui-SYD Sydney Kingsford Smith
31h 40m1 stop Singapore Changi
$656Scoot
Wed, Mar 31 - Sun, Apr 4
Multiple Airlines Logo
9:35 pm - 6:50 pmSYD  Sydney Kingsford Smith-USM Ko Samui
25h 15m1 stop Singapore Changi
Multiple Airlines Logo
7:50 am - 6:25 amUSM  Ko Samui-SYD Sydney Kingsford Smith
19h 35m2 stops Bangkok Suvarnabhumi Shenzhen
$889Multiple Airlines
Mon, Feb 8 - Wed, Feb 24
British Airways Logo
4:20 pm - 6:15 pmSYD  Sydney Kingsford Smith-USM Ko Samui
29h 55m1 stop Singapore Changi
British Airways Logo
1:25 pm - 6:55 amUSM  Ko Samui-SYD Sydney Kingsford Smith
13h 30m1 stop Singapore Changi
$910British Airways
Sun, Feb 7 - Sat, Feb 27
British Airways Logo
4:20 pm - 6:15 pmSYD  Sydney Kingsford Smith-USM Ko Samui
29h 55m1 stop Singapore Changi
British Airways Logo
1:25 pm - 6:55 amUSM  Ko Samui-SYD Sydney Kingsford Smith
13h 30m1 stop Singapore Changi
$910British Airways
Mon, Feb 8 - Mon, Feb 22
British Airways Logo
4:20 pm - 6:15 pmSYD  Sydney Kingsford Smith-USM Ko Samui
29h 55m1 stop Singapore Changi
British Airways Logo
1:25 pm - 6:55 amUSM  Ko Samui-SYD Sydney Kingsford Smith
13h 30m1 stop Singapore Changi
$910British Airways
Tue, Feb 9 - Mon, Feb 22
British Airways Logo
4:20 pm - 9:05 pmSYD  Sydney Kingsford Smith-USM Ko Samui
32h 45m1 stop Singapore Changi
British Airways Logo
1:25 pm - 6:55 amUSM  Ko Samui-SYD Sydney Kingsford Smith
13h 30m1 stop Singapore Changi
$910British Airways
Thu, Feb 11 - Mon, Feb 22
British Airways Logo
4:20 pm - 9:05 pmSYD  Sydney Kingsford Smith-USM Ko Samui
32h 45m1 stop Singapore Changi
British Airways Logo
1:25 pm - 6:55 amUSM  Ko Samui-SYD Sydney Kingsford Smith
13h 30m1 stop Singapore Changi
$910British Airways
Wed, Feb 10 - Sun, Feb 21
British Airways Logo
4:20 pm - 6:15 pmSYD  Sydney Kingsford Smith-USM Ko Samui
29h 55m1 stop Singapore Changi
British Airways Logo
1:25 pm - 6:55 amUSM  Ko Samui-SYD Sydney Kingsford Smith
13h 30m1 stop Singapore Changi
$910British Airways
Sat, Feb 13 - Sat, Feb 27
British Airways Logo
4:20 pm - 6:15 pmSYD  Sydney Kingsford Smith-USM Ko Samui
29h 55m1 stop Singapore Changi
British Airways Logo
1:25 pm - 6:55 amUSM  Ko Samui-SYD Sydney Kingsford Smith
13h 30m1 stop Singapore Changi
$910British Airways
Wed, Nov 4 - Sun, Nov 8
Scoot Logo
1:25 pm - 10:55 amSYD  Sydney Kingsford Smith-USM Ko Samui
25h 30m1 stop Singapore Changi
Scoot Logo
12:00 pm - 6:50 pmUSM  Ko Samui-SYD Sydney Kingsford Smith
26h 50m1 stop Singapore Changi
$978Scoot
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.

How much is a round-trip flight from Sydney to Ko Samui?

Round-trip flights from Sydney to Ko Samui typically range from $710 to $1,078. The lowest price found in the past 5 days was $656, on Scoot.

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’s the cheapest month to fly from Sydney to Ko Samui?

•August is the cheapest month to fly from Sydney to Ko Samui at $719 round-trip.
•December ($1,360) and January ($1,098) 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

$309
Beat the crowds with an average 31% drop in travelers.
The most popular month to fly with an average 20% increase in travelers.
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 round-trip price

Your Sydney to Ko Samui flight questions, answered

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

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

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

    • Economy Class
    • Business Class

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

    A nonstop flight from Sydney to Ko Samui takes 00m, covering 4,495 miles.

  • 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?

    Round-trip flights from Sydney to Ko Samui range from $710 to $1,078, with an average of $898 over the past 12 months. Anything below $710 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 $898 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, round-trip prices on this route showed a wide range, from about $656 to $4,996. That means the highest observed fare was about 8x 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 lower than usual. Average one-way flight prices are about $414, which is 21% below the typical average for this route.

  • What car rental options are available at Ko Samui Airport (USM)?

    Ko Samui Airport (USM) hosts 5 major car rental companies, with daily rates starting from around $13 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 $806 round-trip on average, while Saturday is the most expensive at $1,024, a difference of $218.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

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

    Flying via Bangkok Suvarnabhumi (BKK) gives the shortest average 1-stop total travel time at 13h 36m, compared with 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 Lamai Beach, Chaweng Beach and Fishermans Village. 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 $806, about $218 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 $719 round-trip in that month - typically $641 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 rental

Car rentals in Ko Samui
Hotels in Ko Samui
Vacations in Ko Samui