How the cheapest fare moved
Sep 14: €105
€105
Sep 8
Sep 14
low €105 · high €139
Departure-day prices · March 2027 Chiang Mai → Koh Samui
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Return-day prices · March 2027 Koh Samui → Chiang Mai
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Best time to visit Koh Samui — climate Jan: ~28°C daytime, 16 rainy days
28°
Jan Feb: ~29°C daytime, 15 rainy days
29°
Feb Mar: ~30°C daytime, 15 rainy days
30°
Mar Apr: ~31°C daytime, 18 rainy days
31°
Apr May: ~30°C daytime, 25 rainy days
30°
May Jun: ~31°C daytime, 19 rainy days
31°
Jun Jul: ~33°C daytime, 13 rainy days
33°
Jul Aug: ~31°C daytime, 21 rainy days
31°
Aug Sep: ~31°C daytime, 20 rainy days
31°
Sep Oct: ~30°C daytime, 29 rainy days
30°
Oct Nov: ~29°C daytime, 21 rainy days
29°
Nov Dec: ~29°C daytime, 15 rainy days
29°
Dec Best value: Nov — fares from €105 and ~29°C daytime.
Flights from Chiang Mai to Koh Samui start around €105 (typically 1 stop). Range seen recently: €105–116, based on 16 fares found by travellers.
Fly (from €105)
2h 15m duration
€105–116 recent fares
Book
Cheapest cached fares Chiang Mai → Koh Samui; typically 1 stop (e.g. FD). · Based on 16 fares found by travellers in the last 48h
Cheapest round trips to Koh Samui Fares found by travellers in the last 48 hours — refreshed daily.
Feb 28 – Mar 3
Thai AirAsia · 1 stop · 2h 50m
€225
Book
Nov 21 – Nov 28
Nok Air · 1 stop · 2h 50m
€301
Book
Sep 25 – Sep 26
Thai Vietjet Air · 1 stop · 3h 05m
€304
Book
Weather in Koh Samui
Tue
🌧️
30°
26°
💧98%
Wed
⛈️
30°
25°
💧69%
Thu
🌧️
29°
25°
💧84%
Fri
🌧️
28°
25°
💧93%
Sat
🌧️
26°
24°
💧94%
Sun
🌦️
27°
25°
💧92%
Mon
🌦️
29°
25°
💧81%
In Mar, Koh Samui typically sees ~31°C daytime highs and 10 rainy days.
Where to stay in Koh Samui 3★+ hotels from €27/night (39 hotels sampled, ~3 weeks out).
COSI Samui Chaweng Beach
hotel · Koh Samui
from €27/night ★ 3
Escape Beach Resort
hotel · Koh Samui
from €28/night ★ 3
Montien House Chaweng Beach Resort
hotel · Koh Samui
from €28/night ★ 3
Good to know Time difference Same time zone
Time in the air 2h 50m
Things to do in Koh Samui Top-rated tours and tickets from €21 — book ahead for the popular ones.
Tours and tickets provided by Viator (a Tripadvisor company). Some links earn Stayonomy a commission.
About Koh Samui
Ko Samui (เกาะสมุย), often called just Samui (สมุย) is an island of great natural beauty and variety in the Gulf of Thailand. The palm-fringed shoreline and coconut and fruit cultivation of the coastal lowlands rise to a central granite massif, the slopes of which are cloaked in virgin rainforest.
Read the full Koh Samui guide
Guide content from Wikivoyage contributors (CC BY-SA).
Popular from Chiang Mai Cheapest destinations travellers searched recently — refreshed daily.
Flight prices are real fares travellers found in the last 48 hours, refreshed daily — the booking site confirms the final price. Train, bus and ferry fares are shown on the operators' booking sites. Weather data by Open-Meteo ; exchange rates: ECB reference. Data updated 2026-09-14. Some links earn Stayonomy a commission at no cost to you.