Statistics on Sydney-Koh Samui flights: what is the right price and when to buy your plane ticket?
Best time to go: what is the RIGHT price for a round-trip flight to Koh Samui (from: Sydney)
The average price to go to Koh Samui from Sydney airport is $ 684 (round trip). However, there are variations depending on the departure month. Thus, it is possible to pay for your plane ticket on average between $ 576 (in may) and $ 921 (in december), which is a saving of $ 109 or a surplus of $ 237 (compared to the average price) depending on the period you leave.
The analysis of all prices reveals that the most frequent price is between $542 to $597 and it is generally more economical to leave on a monday and return on a monday on a flight with 1 or more layovers.
Be careful, the cheapest months may correspond to unfavorable weather periods . Check out our page best time to go to Koh Samui before booking your flight.
If you want to know when to book your flight at the best price, go straight to the second part of this page: When to buy your Sydney-Koh Samui plane ticket.
How are these data calculated?
We have studied a sample of 60018 airfare prices from previous years for flights to Koh Samui from Sydney and can thus establish precise and credible price variation trends based on different parameters. Of course, prices can vary from year to year, but the seasonal aspect of this data (recurrence of school holidays, events... from year to year) makes these statistics quite reliable.
Average price depending on the departure month
Data analysis:
By leaving in may, the price of the plane ticket will statistically be the cheapest ($ 576, saving $ 109 compared to the average price over the year which is $ 684). Conversely, december will be the most expensive ($ 921).
Flight Sydney-Koh Samui: when is the best time to go for the best price?
| Month | Good price* | Average price | Our opinion |
|---|---|---|---|
| January | $ 804 | $ 917 | high price |
| February | $ 585 | $ 672 | good price |
| March | $ 503 | $ 577 | good price |
| April | $ 660 | $ 726 | fair price |
| May | $ 509 | $ 576 the cheapest | very good price |
| June | $ 548 | $ 612 | good price |
| July | $ 637 | $ 739 | fair price |
| August | $ 560 | $ 620 | good price |
| September | $ 522 | $ 611 | good price |
| October | $ 549 | $ 644 | good price |
| November | $ 519 | $ 592 | good price |
| December | $ 806 | $ 921 the most expensive | very high price |
*great price to buy your plane ticket: if you see this price or cheaper during your flight search, go for it and buy it!
Price breakdown to travel from Sydney to Koh Samui
Data analysis:
The prices for flights from Sydney to Koh Samui range from $379 to $1138. 3% of tickets were purchased at the minimum price (from $380 to $434), 1% at the maximum price (from $1084 to $1138). The majority of plane tickets were purchased in the range of $542 to $597 (17% of tickets).
Cheapest airlines for the Sydney->Koh Samui flight
There are 7 companies that serve Sydney from Koh Samui airport: Scoot, Airasia X, Thai Airasia X, Jetstar, Vietjet Air, Qantas and Virgin Australia.
Data analysis:
Of the 60018 flights analyzed in previous years, Scoot was the airline that offered the best fare most often in the flight ticket search results (63% of the time) on the Sydney->Koh Samui route.
Which day of the week to leave?
Data analysis:
Statistically, Sydney-Koh Samui flights departing on a monday are cheaper than on other days of the week. By choosing a monday as your departure date, you can save an average of $30. On the other hand, departing on a thursday may cost you an additional $30.
Which day of the week to come back?
Data analysis:
Statistically, return flights from Koh Samui to Sydney departing on a monday are cheaper than on other days of the week. By choosing a monday for your return date, you will save an average of $19. Conversely, departing from Koh Samui on a friday may cost you an additional $14.
Top prices Sydney-Koh Samui
| Round trip | Dates | Price | |
|---|---|---|---|
| Sydney → Koh Samui | 05-05 to 19-05-2025 | $ 382 | layover flight with Scoot |
| Sydney → Koh Samui | 17-05 to 26-05-2025 | $ 393 | layover flight with Scoot |
| Sydney → Koh Samui | 19-05 to 26-05-2025 | $ 384 | layover flight with Scoot |
| Sydney → Koh Samui | 10-06 to 17-06-2025 | $ 395 | layover flight with Scoot |
| Sydney → Koh Samui | 15-10 to 25-10-2025 | $ 391 | layover flight with Scoot |
| Sydney → Koh Samui | 21-10 to 31-10-2025 | $ 391 | layover flight with Scoot |
| Sydney → Koh Samui | 24-10 to 31-10-2025 | $ 394 | layover flight with Scoot |
| Sydney → Koh Samui | 02-11 to 11-11-2025 | $ 395 | layover flight with Scoot |
| Sydney → Koh Samui | 04-11 to 13-11-2025 | $ 395 | layover flight with Scoot |
| Sydney → Koh Samui | 10-11 to 20-11-2025 | $ 394 | layover flight with Scoot |
When to book your flight Sydney - Koh Samui to get the cheapest price?
Statistically, you will make the biggest savings by buying your plane ticket between 3 to 4 months in advance. However, you may end up paying a high price if you book between 11 to 12 months in advance.
Did you know: the price of plane tickets not only varies depending on how far in advance you book, but also on the day of the week you book! So, to maximize your chances of getting the best price for a Sydney-Koh Samui flight, it is recommended to book your ticket on a saturday.
How far in advance should I buy my flight?
Data analysis:
To get the cheapest flight ticket from Sydney to Koh Samui, it is recommended to buy it 3 to 4 months before departure (it is then on average 651 $, which is a saving of 33 $ compared to the overall average price). On the other hand, if you buy your ticket 11 to 12 months in advance, you will pay the full price (150 $ more than the average price).
Depending on the departure month
The best time to buy your Sydney to Koh Samui flight ticket may vary depending on your departure month. Therefore, we offer you statistics on when to book your flight month by month.
| Departure on... | How far in advance should I book? |
|---|---|
| January | Best time: 10 to 11 months before departure (average price: 846 $) Other interesting period(s): 1 to 2 months ($ 897), 4 to 5 months ($ 917), 5 to 6 months ($ 904), 7 to 8 months ($ 882), 8 to 9 months ($ 896), 9 to 10 months ($ 882) |
| February | Best time: 10 to 11 months before departure (average price: 599 $) Other interesting period(s): 1 to 2 months ($ 663), 2 to 3 months ($ 625), 3 to 4 months ($ 664), 4 to 5 months ($ 641), 5 to 6 months ($ 662), 6 to 7 months ($ 654), 9 to 10 months ($ 638) |
| March | Best time: 2 to 3 months before departure (average price: 522 $) Other interesting period(s): 1 to 2 months ($ 562), 3 to 4 months ($ 536), 4 to 5 months ($ 572), 7 to 8 months ($ 563) |
| April | Best time: 3 to 4 months before departure (average price: 671 $) Other interesting period(s): 1 to 2 months ($ 723), 2 to 3 months ($ 690), 4 to 5 months ($ 701), 9 to 10 months ($ 720) |
| May | Best time: 2 to 3 months before departure (average price: 511 $) Other interesting period(s): 1 to 2 months ($ 563), 3 to 4 months ($ 519), 4 to 5 months ($ 536), 5 to 6 months ($ 575), 8 to 9 months ($ 573) |
| June | Best time: 3 to 4 months before departure (average price: 530 $) Other interesting period(s): 1 to 2 months ($ 611), 2 to 3 months ($ 549), 4 to 5 months ($ 578), 5 to 6 months ($ 591), 7 to 8 months ($ 606) |
| July | Best time: 3 to 4 months before departure (average price: 657 $) Other interesting period(s): 1 to 2 months ($ 718), 2 to 3 months ($ 737), 4 to 5 months ($ 679), 5 to 6 months ($ 690), 9 to 10 months ($ 718), 10 to 11 months ($ 731) |
| August | Best time: 4 to 5 months before departure (average price: 534 $) Other interesting period(s): 1 to 2 months ($ 619), 3 to 4 months ($ 595), 6 to 7 months ($ 598), 7 to 8 months ($ 592), 9 to 10 months ($ 616) |
| September | Best time: 5 to 6 months before departure (average price: 541 $) Other interesting period(s): 2 to 3 months ($ 571), 3 to 4 months ($ 562), 4 to 5 months ($ 565), 6 to 7 months ($ 588), 7 to 8 months ($ 608), 9 to 10 months ($ 598) |
| October | Best time: 6 to 7 months before departure (average price: 558 $) Other interesting period(s): 1 to 2 months ($ 628), 2 to 3 months ($ 624), 3 to 4 months ($ 597), 4 to 5 months ($ 572), 5 to 6 months ($ 599) |
| November | Best time: 8 to 9 months before departure (average price: 538 $) Other interesting period(s): 1 to 2 months ($ 577), 2 to 3 months ($ 584), 3 to 4 months ($ 572), 4 to 5 months ($ 561), 6 to 7 months ($ 563), 7 to 8 months ($ 561), 9 to 10 months ($ 579) |
| December | Best time: 8 to 9 months before departure (average price: 822 $) Other interesting period(s): 1 to 2 months ($ 887), 2 to 3 months ($ 901), 3 to 4 months ($ 911), 7 to 8 months ($ 911), 9 to 10 months ($ 834), 10 to 11 months ($ 853) |
What day of the week should I book my flight ticket?
Data analysis:
Statistically, saturday is the day when plane tickets for Sydney->Koh Samui are the cheapest. So, by buying your plane ticket on a saturday, you will save $15. Conversely, by buying it on a thursday, you may end up paying $20 more.
Sydney to Koh Samui: flight price when booking today
Information: this data is not statistics but comes from real prices collected less than 7 days ago. Some months may not be available as we do not have enough data for them.
| Month | Current price | Our opinion | |
|---|---|---|---|
| April 2025 | $ 897 $643 to $2404 | high price | Find a flight |
| May 2025 | $ 491 $382 to $1711 | very good price | Find a flight |
| June 2025 | $ 447 $395 to $566 | very good price | Find a flight |
| July 2025 | $ 636 $464 to $1841 | very good price | Find a flight |
| August 2025 | $ 484 $405 to $638 | very good price | Find a flight |
| September 2025 | $ 572 $421 to $4277 | very good price | Find a flight |
| October 2025 | $ 679 $391 to $6519 | high price | Find a flight |
| November 2025 | $ 449 $391 to $574 | very good price | Find a flight |
| December 2025 | $ 782 $496 to $1073 | very good price | Find a flight |
| January 2026 | $ 759 $624 to $1327 | very good price | Find a flight |
| February 2026 | $ 582 $506 to $715 | very good price | Find a flight |
Data analysis:
Compared to the average price, may, june, july, august, september, november, december, january and february are cheaper to travel to Koh Samui. So it may be interesting to book now to leave during these months!