How the cheapest fare moved
Sep 7: €112 €112
Aug 31
Sep 7
low €107 · high €144
Departure-day prices · March 2021 Chiang Mai → Koh Samui
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Return-day prices · March 2021 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: Apr — fares from €77 and ~31°C daytime.
Flights from Chiang Mai to Koh Samui start around €77 (typically 1 stop). Range seen recently: €77–120, based on 22 fares found by travellers.
Fly (from €77)
2h 15m duration
€77–120 recent fares
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Cheapest cached fares Chiang Mai → Koh Samui; typically 1 stop (e.g. PG). · Based on 22 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.
Mar 12 – Mar 19
Bangkok Airways · 1 stop · 2h 35m
€226
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Oct 22 – Oct 29
Thai AirAsia · 1 stop · 2h 15m
€252
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Nov 30 – Dec 12
Thai AirAsia · 1 stop · 2h 20m
€272
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Sep 8 – Sep 12
Thai Vietjet Air · 1 stop · 3h 05m
€279
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Sep 9 – Sep 13
Thai Vietjet Air · 1 stop · 3h 05m
€290
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Sep 9 – Sep 14
Thai Vietjet Air · 2 stops · 3h 35m
€311
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Oct 1 – Oct 1
Thai AirAsia · 1 stop · 2h 25m
€380
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Dec 20 – Jan 4
Nok Air · 1 stop · 2h 50m
€402
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Weather in Koh Samui
Mon
🌦️
32°
26°
💧86%
Tue
⛈️
32°
26°
💧75%
Wed
⛈️
32°
26°
💧92%
Thu
⛈️
29°
25°
💧90%
Fri
🌧️
27°
25°
💧92%
Sat
🌦️
26°
25°
💧90%
Sun
🌦️
29°
25°
💧88%
In Mar, Koh Samui typically sees ~31°C daytime highs and 5 rainy days.
Where to stay in Koh Samui 3★+ hotels from €21/night (39 hotels sampled, ~3 weeks out).
COSI Samui Chaweng Beach
hotel · Koh Samui
from €21/night ★ 3
Escape Beach Resort
hotel · Koh Samui
from €28/night ★ 3
Montien House Chaweng Beach Resort
hotel · Koh Samui
from €32/night ★ 3
Good to know Time difference Same time zone
Time in the air 2h 15m
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 2026-09-07. Some links earn Stayonomy a commission at no cost to you.
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