Fastest way from Siem Reap to Vientiane: Flight (1 stop), about 2h 15min (from €190). Cheapest: Bus, from €51 (about 22h). Main companies selling this route on 12Go (checked on October 13, 2026): Singapore Airlines, Thai Airways, China Eastern Airlines; main departure point: Siem Reap Angkor International Airport.
There are 2 ways to get from Siem Reap to Vientiane
Select an option below to see the route details and compare prices. Secure booking via our partner 12go.asia.
Companies selling this route on 12Go
Offers listed on 12Go on October 13, 2026 for a departure on November 3, 2026. Timetables and prices change with the date: check them before booking.
| Company | Mode | Departs from | From | Offers |
|---|---|---|---|---|
| Mekong Flash Travel | Bus | Capital tuor | €51 | 1 |
| Grand Apsara Voyage | Bus | Siem Reap Voyage Travel | €51 | 1 |
| Namo Angkor Travel | Bus | Siem Reap Namo Angkor Travel 9R3X GPP | €59 | 1 |
| Khmer Prestige | Bus | Pure Coffee Krong Siem Reap | €62 | 1 |
| MMB Travel | Bus | Siem Reap | €72 | 1 |
| Thai Airways | Flight | Siem Reap Angkor International Airport | €237 | 3 |
| Lao Airlines | Flight | Siem Reap Angkor International Airport | €254 | 1 |
| China Eastern Airlines | Flight | Siem Reap Angkor International Airport | €290 | 3 |
| Cambodia Airways | Flight | Siem Reap Angkor International Airport | €368 | 2 |
| Singapore Airlines | Flight | Siem Reap Angkor International Airport | €531 | 6 |
Activate an eSIM before you go: internet the moment you land, no SIM to swap, zero roaming fees.
Practical tips
This is the most common land border for this route. Have your passport, visa photos, and exact cash for the Lao visa on arrival ready. Do not engage with 'fixers' who promise to expedite the process; they often overcharge and can complicate things. Follow official signs and queues.
For bus journeys, it's wise to book your ticket one to three days in advance, especially during peak season. You can often book directly at local bus stations, through guesthouses, or via online platforms like 12go.asia. Always confirm your exact departure point and time.
If choosing a night bus, read recent reviews carefully regarding the operator's safety record and comfort. Opt for reputable companies even if they are slightly more expensive. Keep your valuables close and secure. Some night buses offer sleeper berths for a more comfortable journey.
Most nationalities can get a Visa on Arrival (VOA) at the Chong Mek/Vang Tao border. Make sure you have one passport-sized photo and US dollars for the fee (typically $30-45 depending on nationality, plus a small 'stamping fee'). Check current requirements before you travel.
Have small denominations of Cambodian Riel and US Dollars for your journey, and Thai Baht might also be useful near the border. Consider purchasing a local SIM card in Cambodia before you leave for continuous connectivity, especially helpful for online maps or booking last-minute accommodation.
The journey experience
Traveling from Siem Reap to Vientiane is a classic Southeast Asian overland adventure, but knowing the real deal on travel times and reliable operators can save you a lot of hassle. Forget the optimistic schedules you might see advertised; we'll give you the lowdown on what to expect, comparing all your options side by side so you can make an informed choice that suits your budget and pace.
Your primary options are flying, which is fast but involves airport transfers, or taking a combination of buses, which is more economical but a much longer journey. A flight takes about 2 hours 15 minutes to 2 hours 25 minutes and costs from €190, plus time at airports. Overland, you're looking at a journey that typically involves multiple legs, often crossing the border at Chong Mek/Vang Tao. Expect the entire bus journey, including transfers and border formalities, to be significantly longer than any single leg suggests, often ranging from 18 to 24 hours. Look for operators like Virak Buntham or Thean Phov for combined tickets, but always double-check current reviews.
The key to a smooth journey is understanding that schedules can shift, and touts are common, especially at borders. Don't rely solely on old blog posts for information. We recommend checking real-time comparisons and booking through reputable platforms. While road quality in Cambodia is improving, safety on night buses can be a concern. Opt for well-reviewed companies, even if it means paying a bit more, and always confirm departure points and times directly. This route requires a bit of patience, but with the right preparation, it's an incredibly rewarding experience.
Frequently asked questions — Siem Reap → Vientiane
By bus, the journey typically takes between 18 and 24 hours, including border crossing formalities and transfers between different bus segments. Flights are much quicker, about 1 hour flying time, but factor in travel to and from airports and check-in, making the door-to-door time closer to 4-6 hours.
A bus ticket can range from €51-€59. Flights are around €190-€211. Booking a day or two ahead is recommended, especially for buses, to secure your spot and avoid last-minute price hikes or sold-out journeys. Online platforms or reputable travel agents are good options.
You'll typically exit Cambodia, get your passport stamped, then proceed to the Lao side. For Laos, most nationalities can obtain a Visa on Arrival (VOA). Ensure you have your passport, one recent passport-sized photo, and US dollars for the visa fee (usually $30-45) and a small 'stamping fee.' Be wary of anyone offering to 'help' for an extra charge; stick to official channels.
If speed is your priority and budget allows, flying is the best option. However, for a more immersive and budget-friendly experience, the bus is a viable choice. The 'best' depends on your preferences: comfort and speed (plane) versus adventure and cost-effectiveness (bus). Many travelers enjoy the overland journey as part of the Southeast Asia experience.
Most long-distance buses, including those heading towards the Laos border, depart from Siem Reap's main bus terminal, located about 7km east of the city center. You can easily reach it by tuk-tuk, which should cost around $3-$5 and take about 15-20 minutes depending on traffic. Confirm the exact terminal with your booking.
Why visit Vientiane?
- ✓ Explore the majestic Wat Sisaket, one of Vientiane's oldest temples
- ✓ Visit the Patuxai Victory Monument, often called Vientiane's Arc de Triomphe
- ✓ Discover the Pha That Luang, a grand golden stupa and national symbol
- ✓ Stroll along the Mekong Riverside Park at sunset for street food and views
- ✓ Experience local culture at the bustling Talat Sao Morning Market
When to visit Vientiane?
TROPICAL SEC ET HUMIDE
November to February — dry season with cooler temperatures, ideal for sightseeing and outdoor activities
What to do in Vientiane?
Local experiences, must-see sights and activities selected for you
How long to visit Vientiane?
For an independent traveler, plan 2-3 full days to explore Vientiane's main temples, markets, and riverside. With more time, consider day trips to Buddha Park or local craft villages. A minimum of 2 days is necessary to get a feel for the city's relaxed pace.
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