Cheapest routes found recently
Cheapest price by month
| Month | Round trip from |
|---|---|
| November 2026 | $111 |
| December 2026 | $181 |
| January 2027 | $173 |
| February 2027 | $172 |
| March 2027 | $161 |
| April 2027 | $159 |
| May 2027 | $171 |
| June 2027 | $171 |
| July 2027 | $171 |
| August 2027 | $163 |
| September 2027 | $171 |
| October 2027 | $292 |
Weather by month
The warmest month in Koh Samui is May, around 33 °C by day; the coolest is December, around 23 °C at night. The wettest month is November, with about 419 mm of rain, and the driest February, with about 47 mm.
| Month | Day °C | Night °C | Rain |
|---|---|---|---|
| January | 29.4° | 23.2° | 81 mm moderate |
| February | 30.1° | 23.7° | 47 mm moderate |
| March | 31.4° | 24.5° | 68 mm moderate |
| April | 32.6° | 25.1° | 74 mm moderate |
| May | 32.8° | 25.0° | 131 mm wet |
| June | 32.0° | 24.9° | 89 mm moderate |
| July | 31.9° | 24.7° | 91 mm wet |
| August | 31.7° | 24.7° | 102 mm wet |
| September | 31.3° | 24.1° | 127 mm wet |
| October | 30.4° | 23.8° | 264 mm wet |
| November | 29.4° | 23.4° | 419 mm wet |
| December | 29.0° | 23.0° | 194 mm wet |
Best time to go
No month in Koh Samui combines the cheapest fares with mild weather, so go on price: the cheapest time to fly is November, March, April, from $111.
-
November
$111
29 °C wet
-
March
$161
31 °C moderate
-
April
$159
33 °C moderate
Cheapest departure city each month
Airports
Most cheap flights to Koh Samui arrive at Koh Samui Airport, 0 km from the centre, which handles 100% of them.
- Koh Samui Airport USM 0 km from centre · 100% of arrivals
Airlines
-
Nok Air
1 route
-
Bangkok Airways
1 route
-
Thai Lion Air
1 route
Practical facts
Prices are paid in THB. Clocks are set to UTC+7. Sockets are type A, B, C and the mains supply is 230 V, 50 Hz. The main language is Thai. The international dialling code is +66, and traffic drives on the left.
-
THB
Currency
-
UTC+7
Time zone
-
A, B, C
Plug type
-
230 V, 50 Hz
Mains supply
-
Thai
Languages
-
+66
Dialling code
-
Left
Traffic
-
eSIM
Mobile data · Airalo
Also consider flying to
-
Phuket
260 km away $117
Questions and answers
- Which month is the cheapest to fly to Koh Samui?
- November is currently the cheapest month, with tickets from $111.
- From where is it cheapest to fly to Koh Samui right now?
- The cheapest departure city found is Bangkok, from $111 in November.
- Are there direct flights to Koh Samui?
- Yes. Of 1 route with recent prices, 1 has a direct flight.
- Which airlines fly to Koh Samui?
- Airlines found on these routes: Nok Air, Bangkok Airways, Thai Lion Air.
- Is there a cheaper nearby airport for Koh Samui?
- Phuket is 260 km away, with flights from $117.
- What is the weather like in Koh Samui in May?
- The warmest month in Koh Samui is May, with daytime highs around 33 °C and about 131 mm of rain.
- When is the best time to visit Koh Samui?
- On price alone, the cheapest time to fly is November, March, April, from $111.
- Which currency is used in Koh Samui?
- The currency is THB. Sockets are type A, B, C and the mains supply is 230 V, 50 Hz.
- Which airport should I fly into for Koh Samui?
- Koh Samui Airport takes 100% of the cheapest flights and is 0 km from the centre.
Prices last updated Nov. 4, 2026
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