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Cheap flights from Cairns to Ko Samui from $548

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 21/3. Fares are subject to change and may not be available on all flights or dates of travel.
CNS — USM
15 Mar — 22 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Cairns to Ko Samui

Enter your travel dates to find the best prices.

Cheapest flights from Cairns to Ko Samui
Explore the most affordable flight options available from Cairns to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 February 2026.

Sun 8/312:35
CNS
-
USM
2 stops56h 40m
Qantas Airways
Thu 12/308:15
USM
-
CNS
2 stops23h 30m
Qantas Airways
Deal found 9/2$1,484
Wed 11/318:35
CNS
-
USM
1 stop16h 25m
Singapore Airlines
Sun 15/308:55
USM
-
CNS
1 stop29h 25m
Singapore Airlines
Deal found 12/2$1,786
Sun 8/318:35
CNS
-
USM
1 stop16h 25m
Singapore Airlines
Thu 12/312:00
USM
-
CNS
1 stop26h 20m
Singapore Airlines
Deal found 9/2$1,916
Mon 16/218:35
CNS
-
USM
1 stop16h 25m
Multiple Airlines
Sat 21/208:55
USM
-
CNS
3 stops17h 50m
Multiple Airlines
Deal found 11/2$1,994
Wed 11/314:50
CNS
-
USM
2 stops55h 45m
Cathay Pacific
Sun 15/311:40
USM
-
CNS
2 stops44h 05m
Cathay Pacific
Deal found 12/2$2,111

Find flight deals from Cairns to Ko Samui

Discover tips and strategies to find the most affordable flight options for your journey from Cairns (CNS) 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 13 February 2026.

Round-trip from

$1,484
Qantas Airways
  • Qantas Airways
  • 8/3-12/3
  • 4 total stops
  • 80h 10m total
  • Cairns to Ko Samui
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Cairns 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 13 February 2026.
Use the filters below to find and compare flights from Cairns to Ko Samui that are best for you.

Fly from

Cairns

Fly to

Ko Samui

Route

Depart

Return

Price

CairnsKo Samui

CNS - USM

CNSUSM

Cairns

Sun 8/3

12:35-18:15

2 stops56h 40m

Ko Samui

Thu 12/3

08:15-10:45

2 stops23h 30m

$1,484

CairnsKo Samui

CNS - USM

CNSUSM

Cairns

Sun 8/3

18:35-08:00

1 stop16h 25m

Ko Samui

Thu 12/3

12:00-17:20

1 stop26h 20m

$1,916

CairnsKo Samui

CNS - USM

CNSUSM

Cairns

Sat 21/3

19:15-17:10

2 stops24h 55m

$548

CairnsKo Samui

CNS - USM

CNSUSM

Cairns

Fri 20/3

14:35-18:50

2 stops31h 15m

$645

CairnsKo Samui

CNS - USM

CNSUSM

Cairns

Fri 20/3

18:35-18:50

1 stop27h 15m

$974

Flights are sorted by cheapest return flights first.

Deals found on 12/2

Best time to book a flight from Cairns to Ko Samui

Have a flexible travel schedule? Discover the best time to fly to Ko Samui from Cairns 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.

Related info for your journey

Find useful and relevant information for your journey from Cairns to Ko Samui. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Cairns to Ko Samui?

    For as low as $1,916, Qantas Airways can have you in Ko Samui from Cairns in 16h 25m. The distance from Cairns to Ko Samui is about 5816 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • Can I find deals for flights from Cairns to Ko Samui that include hotel bookings?

    Yes. In addition to deals on Cairns to Ko Samui flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Cairns to Ko Samui?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Cairns to Ko Samui.

  • Can I find deals for business class flights from Cairns to Ko Samui?

    Yes. Cheapflights offers flight deals from Cairns 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.

See more FAQs

Travelling to a place near Ko Samui?

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

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How does Cheapflights help users find flights from Cairns to Ko Samui?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Cairns to Ko Samui. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Cairns to Ko Samui?

Millions of users choose and trust Cheapflights to book the best flight deals from Cairns to Ko Samui for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Cairns to Ko Samui with no change fees?

Certainly. Search results for flights to Ko Samui from Cairns 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 Cairns to Ko Samui become cheaper?

Yes, Cheapflights offers price alerts on Cairns to Ko Samui flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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