Vientiane to Kasi covers about 167 km, from the Lao capital up to the small town of Kasi in the karst country south of Vang Vieng.
Journey time and distance
At roughly 167 km, this segment takes about 1.5 to 2 hours by express train, passing through Phonhong and Vang Vieng on the way.
Fares
Fares start from around $20 for Second class (checked live on our own booking system in September 2026) — see the search box above for the current fare on your date.
Why travellers take this route
Kasi is a quiet district town rather than a major stop, appealing to travellers who want a calmer alternative to Vang Vieng while staying close to the same limestone-karst scenery.
Booking tips
- Vang Vieng sits just before Kasi on this line — easy to combine both in one trip if you want adventure activities plus a quieter overnight stop.