How the cheapest fare moved
Nov 6: €91 €91
Oct 30
Nov 6
low €86 · high €153
Departure-day prices · August 2027 Chiang Mai → Koh Samui
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Cheapest days highlighted · darker = pricier · past days greyed out · cached one-way fares.
Return-day prices · August 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, 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 €81 and ~29°C daytime.
Flights from Chiang Mai to Koh Samui start around €81 (typically 1 stop). Range seen recently: €81–113, based on 8 fares found by travellers.
Fly (from €81)
2h 25m duration
€81–113 recent fares
Book
Cheapest cached fares Chiang Mai → Koh Samui; typically 1 stop (e.g. VZ). · 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.
Nov 6 – Nov 17
Thai Vietjet Air · 1 stop · 2h 30m
€246
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Jan 24 – Jan 30
Thai AirAsia · 1 stop · 2h 35m
€246
Book
Nov 29 – Dec 4
Thai Vietjet Air · 1 stop · 2h 30m
€277
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Dec 1 – Dec 9
Bangkok Airways · 1 stop · 2h 35m
€282
Book
Nov 30 – Dec 10
Thai Vietjet Air · 1 stop · 2h 35m
€290
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Dec 3 – Dec 10
Bangkok Airways · 1 stop · 2h 35m
€301
Book
Dec 3 – Dec 11
Bangkok Airways · 1 stop · 2h 35m
€301
Book
Dec 13 – Dec 16
Bangkok Airways · 1 stop · 2h 35m
€301
Book
Weather in Koh Samui
Fri
🌦️
30°
24°
💧82%
Sat
⛈️
27°
24°
💧100%
Sun
🌧️
28°
24°
💧98%
Mon
⛈️
28°
24°
💧99%
Tue
🌧️
28°
23°
💧96%
Wed
🌧️
26°
23°
💧100%
Thu
⛈️
26°
24°
💧100%
In Aug, Koh Samui typically sees ~32°C daytime highs and 21 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
Montien House Chaweng Beach Resort
hotel · Koh Samui
from €28/night ★ 3
Escape Beach Resort
hotel · Koh Samui
from €30/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 €48 — 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 2026-11-06. Some links earn Stayonomy a commission at no cost to you.
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