Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
High demand for flights, 30% potential price rise
Best time to find cheap flights, 6% potential price drop
Average for round-trip flights in August 2021
From Sydney Kingsford Smith to Koh Samui
Cheapest prices for Koh Samui flights by month
The cheapest ticket to Koh Samui found for each month in 2021 based on historical flight searches by Cheapflights users.
Currently, April is the cheapest month in which you can book a flight to Koh Samui. Flying to Koh Samui in December will prove the most costly. There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.
When is the best time to fly to Koh Samui?
Average Koh Samui flight ticket prices and weather conditions for 2021 and 2022 by month.
SYD - USM
$810 - $1,642
29 - 33 °C
50 - 423 mm
In the 1970s Thailand’s third largest island was known as a haven for backpackers arriving on cheap flights to Koh Samui. But recent developments of luxury resorts and health spas, plus shops, restaurants and bars, has opened up Koh Samui as a destination of choice for many Australian travellers. Located in the Gulf of Thailand, Koh Samui has a warm, dry climate for most of the year with temps averaging 30C and only a short, wet season. It is blessed with all the trappings of a tropical paradise, white sand beaches with crystal-clear waters, lush tropical rainforest and coral reefs with plentiful fish. Koh Samui’s high season runs from December to August, peaking in the months of July and August. The Christmas holiday period is also very busy and when cheap flights to Koh Samui are harder to find.
Koh Samui’s off season is from September to November as these are the rainy months and sightseeing can be interrupted by afternoon downpours. November is the wettest and windiest month, though surfers should look for cheap flights to Koh Samui at this time as the waves are at their largest.
When is the best time to book a flight to Koh Samui?
Between May and June is the optimal time to take flights to Koh Samui as there are fewer tourists and accommodation prices are lower. The weather is also at its best and the ocean is perfect for swimming, snorkelling and diving. For the cheapest flights to Koh Samui, search for flights a couple of months out from your dates of choice, and fly midweek if you can.
Which day is cheapest to fly to Koh Samui?
At the moment, Tuesday is the most economical day to take a flight to Koh Samui. Sunday is likely to be the most costly.
What time of day is cheapest to fly to Koh Samui?
Koh Samui flights can be made cheaper if you choose a flight in the afternoon. Booking a flight at midday will likely mean higher prices.
Thai Airways is the national carrier and operates indirect flights to Koh Samui from Brisbane, Melbourne, Perth and Sydney via Bangkok. Along with Bangkok Airways, Thai Airways services 17 flights per day to the island. Other airlines that offer indirect flights to Koh Samui from Australia are Etihad Airways, Jetstar and Qantas.
How to get from the airport to the city centre?
Koh Samui Airport (USM) is located approximately 3 km north of Chaweng Beach, the main tourist town. The fifteen minute journey can be undertaken by airport shuttle bus, or private and shared minivans, which can seat up to six passengers. The transport counter in the arrivals area handles information and bookings. There are a few car rental companies in the arrivals area if you wish to hire a car for the duration of your stay.