How the cheapest fare moved
Jul 27: €153 €153
Jul 23
Jul 27
low €115 · high €203
Departure-day prices · April 2027 Chiang Mai → Koh Samui
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Return-day prices · April 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: Sep — fares from €115 and ~31°C daytime.
Flights from Chiang Mai to Koh Samui start around €115 (typically 1 stop). Range seen recently: €115–121, based on 2 fares found by travellers.
Fly (from €115)
2h 20m duration
€115–121 recent fares
Book
Cheapest cached fares Chiang Mai → Koh Samui; typically 1 stop (e.g. DD). · Based on 2 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.
Jan 27 – Feb 18
Thai AirAsia · 1 stop · 2h 30m
€271
Book
Jan 28 – Feb 19
Thai AirAsia · 1 stop · 2h 30m
€271
Book
Jan 27 – Feb 19
Thai AirAsia · 1 stop · 2h 30m
€276
Book
Jan 25 – Feb 19
Thai AirAsia · 1 stop · 2h 30m
€277
Book
Jan 7 – Jan 10
Thai AirAsia · 1 stop · 2h 35m
€369
Book
Aug 7 – Aug 18
Thai Lion Air · 1 stop · 2h 40m
€408
Book
Weather in Koh Samui
Mon
🌧️
32°
25°
💧91%
Tue
🌦️
30°
25°
💧77%
Wed
🌧️
27°
25°
💧92%
Thu
🌧️
28°
25°
💧92%
Fri
⛈️
29°
26°
💧82%
Sat
🌦️
30°
26°
💧74%
Sun
🌦️
30°
26°
💧88%
In Apr, Koh Samui typically sees ~33°C daytime highs and 6 rainy days.
Where to stay in Koh Samui 3★+ hotels from €34/night (34 hotels sampled, ~3 weeks out).
COSI Samui Chaweng Beach
hotel · Koh Samui
from €34/night ★ 3
Crystal Lamai Hotel
hotel · Koh Samui
from €36/night ★ 3
The Fair House Beach Resort & Hotel
hotel · Koh Samui
from €81/night ★ 3
Good to know Time difference Same time zone
Time in the air 2h 30m
Things to do in Koh Samui Top-rated tours and tickets from €47 — 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 2026-07-27. Some links earn Stayonomy a commission at no cost to you.
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