How the cheapest fare moved
Sep 6: €188
€188
Sep 1
Sep 6
low €187 · high €220
Departure-day prices · December 2021 Siem Reap → Vientiane
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Return-day prices · December 2021 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: Sep — fares from €184 and ~31°C daytime.
Flights from Siem Reap to Vientiane start around €184 (typically 1 stop). Range seen recently: €184–230, based on 20 fares found by travellers.
Fly (from €184)
2h 15m duration
€184–230 recent fares
Book
Cheapest cached fares Siem Reap → Vientiane; typically 1 stop (e.g. K6). · Based on 20 fares found by travellers in the last 48h
Cheapest round trips to Vientiane Fares found by travellers in the last 48 hours — refreshed daily.
Oct 22 – Dec 18
Lao Airlines · 1 stop · 4h 40m
€392
Book
Weather in Vientiane
Mon
⛈️
30°
24°
💧96%
Tue
⛈️
30°
24°
💧98%
Wed
⛈️
29°
24°
💧88%
Thu
⛈️
31°
24°
💧96%
Fri
🌦️
30°
23°
💧64%
Sat
🌦️
31°
24°
💧45%
Sun
🌦️
31°
25°
💧31%
In Dec, Vientiane typically sees ~27°C daytime highs and 0 rainy days.
Where to stay in Vientiane 3★+ hotels from €15/night (35 hotels sampled, ~3 weeks out).
Mali Namphu Hotel
hotel · Vientiane
from €15/night ★ 3
Phonepaseuth Guesthouse
hotel · Vientiane
from €19/night ★ 3
Xaysomboun Hotel & SPA
hotel · Vientiane
from €20/night ★ 4
Good to know Time difference Same time zone
Time in the air 4h 40m
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 2026-09-06. Some links earn Stayonomy a commission at no cost to you.