Vientiane to Koh Samui

1 ways to travelfastest 2h 25mfly from €179
Photo: Arun K / Unsplash

Departure-day prices · October 2026 Vientiane → Koh Samui

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Return-day prices · October 2026 Koh Samui → Vientiane

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Best time to visit Koh Samui — climate

Jan: ~28°C daytime, 16 rainy days 28° JanFeb: ~29°C daytime, 15 rainy days 29° FebMar: ~30°C daytime, 15 rainy days 30° MarApr: ~31°C daytime, 18 rainy days 31° AprMay: ~30°C daytime, 25 rainy days 30° MayJun: ~31°C daytime, 19 rainy days 31° JunJul: ~33°C daytime, 13 rainy days 33° JulAug: ~31°C daytime, 21 rainy days 31° AugSep: ~31°C daytime, 20 rainy days 31° SepOct: ~30°C daytime, 29 rainy days 30° OctNov: ~29°C daytime, 21 rainy days 29° NovDec: ~29°C daytime, 15 rainy days 29° Dec

Flights from Vientiane to Koh Samui start around €179 (typically 1 stop). Range seen recently: €179–210, based on 6 fares found by travellers.

Fly (from €179)
2h 25mduration
€179–210recent fares
Book
Cheapest cached fares Vientiane → Koh Samui; typically 1 stop (e.g. FD). · Based on 6 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 4 – Jan 5 THAI Airways · 1 stop · 2h 20m €434 Book
Jan 4 – Jan 6 THAI Airways · 1 stop · 2h 20m €434 Book
Jan 4 – Jan 7 THAI Airways · 1 stop · 2h 20m €434 Book
Jan 4 – Jan 4 THAI Airways · 1 stop · 2h 20m €463 Book

Weather in Koh Samui

Sat 🌧️ 32° 25° 💧93%
Sun 🌧️ 29° 25° 💧98%
Mon 🌧️ 26° 24° 💧100%
Tue ⛈️ 29° 24° 💧95%
Wed ⛈️ 29° 24° 💧94%
Thu 🌦️ 29° 25° 💧92%
Fri 🌦️ 29° 25° 💧95%

In Oct, Koh Samui typically sees ~30°C daytime highs and 29 rainy days.

Where to stay in Koh Samui

3★+ hotels from €23/night (37 hotels sampled, ~3 weeks out).

COSI Samui Chaweng Beach hotel · Koh Samui
from €23/night★ 3
Montien House Chaweng Beach Resort hotel · Koh Samui
from €29/night★ 3
Escape Beach Resort hotel · Koh Samui
from €31/night★ 3

Good to know

Time differenceSame time zone
Time in the air2h 20m

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).

Round out the trip

Popular from Vientiane

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 2026-10-17. Some links earn Stayonomy a commission at no cost to you.