SYD - USM

฿9,583 Find Cheap Flights from Sydney to Ko Samui – Compare and Save

1 adult
1 adult, Economy, 0 bags

Save 16% 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
฿18,836
Typical prices: ฿23,075-฿34,738
Scoot
Mon 29/10Sun 11/11
SYD - USM • 1 stop
Cheapest one-way flight
฿9,583
Typical prices: ฿9,613-฿20,988
Scoot
Sat 3/3
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
26 weeks
in advance
Our data shows that travellers who book at least 26 weeks in advance save around 29% compared to booking last minute.
Insights
Insights
When to travel
November
Cheapest • 19% price drop
December
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
Singapore Changi (SIN)
Cheapest • Avg ฿28,917 (return)
Hong Kong Intl (HKG)
Shortest trip • 15h 06m (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

Thu 29 Oct - Wed 11 Nov
Scoot Logo
20:05 - 17:10SYD  Sydney Kingsford Smith-USM Ko Samui
25h 05m1 stop Singapore Changi
Scoot Logo
18:05 - 12:10USM  Ko Samui-SYD Sydney Kingsford Smith
14h 05m1 stop Singapore Changi
฿18,836Scoot
Tue 16 Feb - Thu 25 Feb
Scoot Logo
13:25 - 08:00SYD  Sydney Kingsford Smith-USM Ko Samui
22h 35m1 stop Singapore Changi
Scoot Logo
18:05 - 18:50USM  Ko Samui-SYD Sydney Kingsford Smith
20h 45m1 stop Singapore Changi
฿19,034Scoot
Tue 27 Oct - Tue 3 Nov
Multiple Airlines Logo
13:25 - 18:25SYD  Sydney Kingsford Smith-USM Ko Samui
33h 00m2 stops Singapore Changi Phuket City
Multiple Airlines Logo
11:10 - 12:10USM  Ko Samui-SYD Sydney Kingsford Smith
21h 00m2 stops Phuket City Singapore Changi
฿19,266Multiple Airlines
Wed 7 Oct - Tue 20 Oct
Multiple Airlines Logo
21:50 - 14:55SYD  Sydney Kingsford Smith-USM Ko Samui
21h 05m2 stops Kuala Lumpur Intl Bangkok Don Mueang Intl
Multiple Airlines Logo
06:55 - 20:35USM  Ko Samui-SYD Sydney Kingsford Smith
33h 40m2 stops Bangkok Don Mueang Intl Kuala Lumpur Intl
฿19,365Multiple Airlines
Fri 19 Feb - Tue 2 Mar
Scoot Logo
13:25 - 18:50SYD  Sydney Kingsford Smith-USM Ko Samui
33h 25m1 stop Singapore Changi
Scoot Logo
18:05 - 18:50USM  Ko Samui-SYD Sydney Kingsford Smith
20h 45m1 stop Singapore Changi
฿19,464Scoot
Thu 29 Oct - Wed 11 Nov
Multiple Airlines Logo
20:05 - 18:50SYD  Sydney Kingsford Smith-USM Ko Samui
26h 45m1 stop Singapore Changi
Multiple Airlines Logo
17:40 - 18:50USM  Ko Samui-SYD Sydney Kingsford Smith
21h 10m2 stops Bangkok Suvarnabhumi Singapore Changi
฿20,257Multiple Airlines
Sat 24 Oct - Sat 31 Oct
Multiple Airlines Logo
14:00 - 15:10SYD  Sydney Kingsford Smith-USM Ko Samui
29h 10m2 stops Singapore Changi Phuket City
Multiple Airlines Logo
08:15 - 18:50USM  Ko Samui-SYD Sydney Kingsford Smith
30h 35m2 stops Phuket City Singapore Changi
฿20,290Multiple Airlines
Wed 21 Oct - Fri 30 Oct
Multiple Airlines Logo
14:00 - 18:50SYD  Sydney Kingsford Smith-USM Ko Samui
32h 50m1 stop Singapore Changi
Multiple Airlines Logo
08:15 - 12:10USM  Ko Samui-SYD Sydney Kingsford Smith
23h 55m2 stops Phuket City Singapore Changi
฿20,852Multiple Airlines
Thu 29 Oct - Wed 11 Nov
Multiple Airlines Logo
20:05 - 15:10SYD  Sydney Kingsford Smith-USM Ko Samui
23h 05m2 stops Singapore Changi Phuket City
Multiple Airlines Logo
11:00 - 12:10USM  Ko Samui-SYD Sydney Kingsford Smith
21h 10m2 stops Bangkok Don Mueang Intl Singapore Changi
฿21,116Multiple Airlines
Tue 27 Oct - Tue 3 Nov
Scoot Logo
13:25 - 10:55SYD  Sydney Kingsford Smith-USM Ko Samui
25h 30m1 stop Singapore Changi
Scoot Logo
12:00 - 12:10USM  Ko Samui-SYD Sydney Kingsford Smith
20h 10m1 stop Singapore Changi
฿21,149Scoot
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 from Sydney to Ko Samui with more confidence.

How much is a return flight from Sydney to Ko Samui?

Return flights from Sydney to Ko Samui start at ฿18,836. Prices are below average for this route right now, with typical return fares ranging from ฿23,075 to ฿34,738. The lowest price found in the past 5 days was ฿18,836 on Scoot.

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

Monday is the cheapest day of the week to fly from Sydney to Ko Samui and is 10% cheaper than the average day. Saturday is the most expensive day with flight prices 10% higher than average. Based on deals found by KAYAK users in the last 12 months.

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

  • November is the cheapest month to fly from Sydney to Ko Samui at ฿23,529 return.
  • December (฿44,281) and January (฿32,814) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 88% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from Sydney to Ko Samui the cheapest?

Flights from Sydney to Ko Samui are cheapest 26 weeks before departure. Booking in this window typically costs about 29% 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

March

Cheapest flight

฿9,583
Best time to beat the crowds (15% less expensive on average)
Most popular time to fly (52% more expensive on average)
Flights 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 route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

  • 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.

  • 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) – 85% of one-stop connections
    • Bangkok Suvarnabhumi (BKK) – 15% of one-stop connections
    • Hong Kong Intl (HKG) – 0% of one-stop connections

    Singapore Changi (SIN) handles the largest share of one-stop connections on this route.

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

    Yes. Being flexible with your travel dates can save you up to 18% on the Sydney to Ko Samui route. Monday is the cheapest departure day at ฿26,470 return on average, while Saturday is the most expensive at ฿32,120, a difference of ฿5,651. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What popular places can I visit in Ko Samui?

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

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

    Last-minute fares on this route (booked within 2 weeks of departure) run 3% above the route average of ฿29,101. Book 26 weeks before departure for the lowest fares.

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

    A direct flight from Sydney to Ko Samui takes 0h 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.

  • 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 ฿18,836 to ฿143,220. 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 ฿11,325, which is 22% below the typical average for this route.

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

    Flying via Singapore Changi (SIN) gives the shortest average 1-stop total travel time of 14h 34m, compared to 15h 06m via Hong Kong Intl (HKG) and 16h 48m via Bangkok Suvarnabhumi (BKK).

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

    Ko Samui is 3 hours behind Sydney (Indochina Time vs Eastern Australia Time). Plan for the time shift when scheduling connections or first-day activities.

  • 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 ฿448 for economy cars. Top options include:
    • Drive Car Rental
    • Alamo
    • Sixt
    • Enterprise Rent-A-Car
    • Hertz

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

    Return flights from Sydney to Ko Samui range from ฿23,075 to ฿34,738, with an average of ฿29,101 over the past 12 months. Anything below ฿23,075 counts as a good deal.

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 instead of Saturday. On this route, Monday flights average ฿26,470 – about ฿5,651 less than Saturday (18% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 26 weeks before you fly. On this route, that window historically saves about 29% 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 November. Fares historically average ฿23,529 return in that month – typically ฿20,753 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
    - Cosi Samui Chaweng Beach
    - 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 rentals in Ko Samui
Hotels in Ko Samui