How the cheapest fare moved
Nov 12: €106 €106
Nov 5
Nov 12
low €66 · high €158
Departure-day prices · September 2026 Chiang Mai → Koh Samui
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Return-day prices · September 2026 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, 16 rainy days
30°
Mar Apr: ~31°C daytime, 18 rainy days
31°
Apr May: ~31°C daytime, 26 rainy days
31°
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 €66 and ~29°C daytime.
Flights from Chiang Mai to Koh Samui start around €66 (direct flights available). Range seen recently: €66–117, based on 9 fares found by travellers.
Fly (from €66)
1h 45m duration
€66–117 recent fares
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Cheapest cached fares Chiang Mai → Koh Samui; direct flights available (e.g. PG). · Based on 9 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.
Nov 20 – Dec 2
Nok Air · 1 stop · 2h 25m
€240
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Jan 24 – Jan 30
Thai AirAsia · 1 stop · 2h 35m
€247
Book
Nov 13 – Nov 16
Thai Vietjet Air · 1 stop · 2h 30m
€258
Book
Jan 19 – Jan 26
Thai AirAsia · 1 stop · 2h 35m
€270
Book
Dec 13 – Dec 16
Bangkok Airways · 1 stop · 2h 35m
€302
Book
Nov 27 – Dec 2
Thai Vietjet Air · 1 stop · 2h 30m
€348
Book
Weather in Koh Samui
Thu
⛈️
26°
24°
💧100%
Fri
🌧️
26°
24°
💧100%
Sat
⛈️
28°
24°
💧90%
Sun
🌦️
29°
25°
💧86%
Mon
🌦️
29°
25°
💧75%
Tue
🌦️
29°
25°
💧71%
Wed
🌦️
28°
25°
💧84%
In Sep, Koh Samui typically sees ~31°C daytime highs and 20 rainy days.
Where to stay in Koh Samui 3★+ hotels from €19/night (38 hotels sampled, ~3 weeks out).
COSI Samui Chaweng Beach
hotel · Koh Samui
from €19/night ★ 3
Escape Beach Resort
hotel · Koh Samui
from €28/night ★ 3
Montien House Chaweng Beach Resort
hotel · Koh Samui
from €31/night ★ 3
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 €22 — 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 2026-11-12. Some links earn Stayonomy a commission at no cost to you.
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