How the cheapest fare moved
Oct 3: €232
€232
Sep 27
Oct 3
low €201 · high €232
Departure-day prices · September 2025 Siem Reap → Vientiane
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Return-day prices · September 2025 Vientiane → Siem Reap
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Best time to visit Vientiane — climate Jan: ~26°C daytime, 0 rainy days
26°
Jan Feb: ~29°C daytime, 2 rainy days
29°
Feb Mar: ~32°C daytime, 1 rainy days
32°
Mar Apr: ~33°C daytime, 11 rainy days
33°
Apr May: ~33°C daytime, 25 rainy days
33°
May Jun: ~32°C daytime, 30 rainy days
32°
Jun Jul: ~31°C daytime, 26 rainy days
31°
Jul Aug: ~31°C daytime, 25 rainy days
31°
Aug Sep: ~31°C daytime, 29 rainy days
31°
Sep Oct: ~31°C daytime, 18 rainy days
31°
Oct Nov: ~29°C daytime, 8 rainy days
29°
Nov Dec: ~29°C daytime, 1 rainy days
29°
Dec Best value: Feb — fares from €198 and ~29°C daytime.
Flights from Siem Reap to Vientiane start around €198 (typically 1 stop). Range seen recently: €198–241, based on 22 fares found by travellers.
Fly (from €198)
2h 15m duration
€198–241 recent fares
Book
Cheapest cached fares Siem Reap → Vientiane; typically 1 stop (e.g. FD). · Based on 22 fares found by travellers in the last 48h
Cheapest round trips to Vientiane Fares found by travellers in the last 48 hours — refreshed daily.
Nov 10 – Nov 24
THAI Airways · 1 stop · 2h 15m
€407
Book
Nov 15 – Nov 17
Air Cambodia · 1 stop · 3h 25m
€427
Book
Weather in Vientiane
Sun
⛈️
32°
25°
💧90%
Mon
⛈️
29°
24°
💧84%
Tue
🌧️
30°
23°
💧51%
Wed
🌦️
30°
22°
💧41%
Thu
🌤️
30°
23°
💧4%
Fri
🌦️
31°
24°
💧10%
Sat
🌦️
26°
23°
💧36%
In Sep, Vientiane typically sees ~31°C daytime highs and 28 rainy days.
Where to stay in Vientiane 3★+ hotels from €19/night (36 hotels sampled, ~3 weeks out).
Viryla Boutique Hotel
hotel · Vientiane
from €19/night ★ 3
Phonepaseuth Guesthouse
hotel · Vientiane
from €19/night ★ 3
Xaysomboun Hotel & SPA
hotel · Vientiane
from €23/night ★ 4
Good to know Time difference Same time zone
Time in the air 2h 15m
Things to do in Vientiane Top-rated tours and tickets from €11 — book ahead for the popular ones.
Tours and tickets provided by Viator (a Tripadvisor company). Some links earn Stayonomy a commission.
About Vientiane
Vientiane (Lao: ວຽງຈັນ, Vieng Chan) is the capital of Laos, with stunning temples, vibrant night markets, beautiful French-Indochinese architecture, lively street food stalls, and traditional craft markets.
Read the full Vientiane guide
Guide content from Wikivoyage contributors (CC BY-SA).
Popular from Siem Reap 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 2026-10-04. Some links earn Stayonomy a commission at no cost to you.