How the cheapest fare moved
Aug 3: €115 €115
Jul 28
Aug 3
low €112 · high €133
Departure-day prices · September 2027 Chiang Mai → Koh Samui
‹ Prev
Next ›
Loading fares…
Return-day prices · September 2027 Koh Samui → Chiang Mai
‹ Prev
Next ›
Loading fares…
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 €112 and ~31°C daytime.
Flights from Chiang Mai to Koh Samui start around €111 (typically 1 stop). Range seen recently: €111–119, based on 8 fares found by travellers.
Fly (from €111)
2h 20m duration
€111–119 recent fares
Book
Cheapest cached fares Chiang Mai → Koh Samui; typically 1 stop (e.g. PG). · Based on 8 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 24 – Feb 25
Thai AirAsia · 1 stop · 2h 25m
€210
Book
Jan 21 – Feb 25
Thai AirAsia · 1 stop · 2h 30m
€227
Book
Aug 11 – Aug 18
Thai AirAsia · 1 stop · 2h 40m
€341
Book
Dec 31 – Jan 5
Thai AirAsia · 1 stop · 2h 30m
€372
Book
Dec 31 – Dec 31
Thai AirAsia · 1 stop · 2h 25m
€451
Book
Weather in Koh Samui
Tue
🌧️
31°
25°
💧81%
Wed
🌦️
31°
26°
💧82%
Thu
🌦️
30°
26°
💧73%
Fri
🌦️
31°
26°
💧82%
Sat
🌦️
31°
27°
💧65%
Sun
⛈️
31°
27°
💧55%
Mon
🌦️
32°
27°
💧47%
Where to stay in Koh Samui 3★+ hotels from €35/night (40 hotels sampled, ~3 weeks out).
Crystal Lamai Hotel
hotel · Koh Samui
from €35/night ★ 3
COSI Samui Chaweng Beach
hotel · Koh Samui
from €36/night ★ 3
Impiana Resort Chaweng Noi
hotel · Koh Samui
from €72/night ★ 4
Good to know Time difference Same time zone
Time in the air 2h 25m
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 2026-08-03. Some links earn Stayonomy a commission at no cost to you.
stayonomy