All four countries, one continuous line
The full crossing: north Vietnam, the Nam Ou valley, the Laos–China Railway, the Friendship Bridge into Thailand, the night train to Bangkok, northern Thailand, then Angkor and the Cambodian Mekong.
At a glance
- Days
- 24 days, 23 nights
- Party size
- 1 to 8, private
- Start
- Hanoi
- End
- Phnom Penh
- Effort
- Moderate — one night train, two 5-hour drives
- From
- USD 3,780 per person
Who this route is for
People with three and a half weeks, who want the whole of mainland Southeast Asia in one line rather than in four separate holidays, and who would rather ride a train across a border than sit in an airport.
The route is built the way it is because of one fact: the Thailand–Cambodia land border has been shut since late June 2025 and was still shut at the end of August 2026. So Thailand has to sit between Laos and Cambodia in the sequence, entered on the ground from Vientiane and left by air to Siem Reap. Run the other way round, you would need two flights instead of one.
Bangkok to Siem Reap, about an hour, and the ticket is inside the price. Every other transition on this route — Vietnam to Laos excepted, which is also a flight because the overland options from Hanoi are poor — happens by train, boat or road. Two flights in twenty-four days across four countries is as few as it can currently be done in.
Day by day
Arrive Hanoi
Met at Noi Bai and driven into the Old Quarter, 35 kilometres, 45 to 80 minutes depending on the hour. Nothing scheduled.
Hanoi on foot
The Old Quarter trade grid, the Temple of Literature, then the colonial quarter. Lunch where the guide eats. The afternoon is loose enough to cut short if the heat wins.
Hanoi to Lan Ha Bay
Two and a half hours to Got pier, boarding away from the Ha Long day-boat traffic. Kayaking in the afternoon, dinner on deck, a night at anchor among the karst.
Lan Ha Bay to Hanoi
Early light on the water, breakfast under way, ashore by 11:00 and back in Hanoi mid-afternoon. Evening free.
Fly Hanoi to Luang Prabang
A short afternoon flight into a town of thirty thousand people. Airport four kilometres out. A walk to the confluence and dinner; nothing more.
Luang Prabang
The alms round watched from a distance and without a flash, then the morning market, Wat Xieng Thong and the Royal Palace. Afternoon at the Traditional Arts and Ethnology Centre.
Luang Prabang to Nong Khiaw
Four hours north into vertical limestone country. Afternoon arrival, and the viewpoint climb if legs and weather agree: 90 minutes up, genuinely steep.
The Nam Ou to Muang Ngoi
An hour upstream to a village that had no road until 2013. Out to Ban Na through the fields, lunch, and back downriver in the late afternoon light.
Nong Khiaw to Luang Prabang
Back down the same road by lunchtime. The afternoon is free, which after a week of moving is the point. Kuang Si falls after 15:00 if you want them.
Luang Prabang to Vientiane by train
Two hours on the Laos–China Railway instead of nine on the old road. Station transfers add about 55 minutes. Afternoon in Vientiane, including the COPE centre.
Vientiane to Bangkok by night train
Across the first Thai–Lao Friendship Bridge in the morning. Lao exit formalities at Khamsavath, Thai entry at Nong Khai, and then a whole afternoon in a town nobody plans for — which is a decent thing on day eleven.
Board the sleeper in the evening. Second-class air-conditioned berths, curtains, and a dining car that is better than it needs to be. Twelve and a half hours to Bangkok.
Arrive Bangkok
Into Krung Thep Aphiwat station at about 09:05. Hotel, shower, and a slow start. Late afternoon on the river: the Chao Phraya express boat is public transport and the best sightseeing in the city.
Bangkok
The Grand Palace and Wat Pho early, before the heat and the queues. Then Wat Arun across the water. Afternoon at Jim Thompson House or the Bangkokian Museum, and the evening free.
Bangkok, and fly to Chiang Mai
A free morning — markets, a massage, or nothing. Afternoon flight north, an hour and ten minutes. Chiang Mai airport is fifteen minutes from the old city.
Chiang Mai
The old city temples on foot in the morning — Wat Chedi Luang and Wat Phra Singh — then up to Doi Suthep in the afternoon, which is thirty minutes of hairpins and a 306-step staircase at the top.
Chiang Mai to Chiang Rai
Three hours north with a stop at the hot springs and, if you want it, the White Temple at Chiang Rai — which is a contemporary art project pretending to be a temple and is worth an hour on those terms.
The Golden Triangle
North to the point where Thailand, Laos and Myanmar meet on the Mekong, and the Hall of Opium, which is a serious museum rather than a novelty. Afternoon in the tea country around Doi Mae Salong.
Fly to Siem Reap
A long transfer day and the only unavoidable flight of the trip: Chiang Rai to Bangkok, then Bangkok to Siem Reap. Into Siem Reap Angkor airport in the evening, 45 kilometres and 55 minutes from town.
We buy your Angkor pass tonight if we land before 17:30. A pass bought after 17:00 admits you that evening and counts from tomorrow.
Angkor: the central group
Out at 07:30, not 04:30. Angkor Wat once the sunrise crowd has left, then the Bayon and Angkor Thom. Back to the hotel from 11:00 to 15:00. Ta Prohm in the late afternoon.
Angkor: the outer temples
Banteay Srei an hour north, carved with a precision nothing else at Angkor matches, then Beng Mealea collapsing into the forest. Both on your pass.
Siem Reap to Battambang
Three hours south-west to the second city, which almost no itinerary stops in. French shophouses, a working art scene, and the bamboo railway on the outskirts.
Battambang to Phnom Penh
Five hours down National Road 5. Into the capital by mid-afternoon; the riverside at dusk is the best free hour in the city.
Phnom Penh
Tuol Sleng and Choeung Ek in the morning, which is a hard morning, and a deliberately gentle afternoon after it. The Royal Palace and National Museum late, or nothing at all.
Depart Phnom Penh
Transfer to Techo International, which opened in September 2025 and sits 20 kilometres from the centre — 45 to 60 minutes, and longer in the evening peak. We budget the hour.
What it costs
| Party size | Simple | Comfortable | Excellent |
|---|---|---|---|
| 2 travellers | USD 3,780 | USD 5,900 | USD 10,350 |
| 3 - 4 | USD 3,090 | USD 4,860 | USD 9,180 |
| 5 - 8 | USD 2,640 | USD 4,210 | USD 8,400 |
What the price includes
- 23 nights as described, twin share, including one sleeper berth and one boat cabin
- Four flights as listed, hold luggage included
- Vientiane – Bangkok overnight train, second-class air-conditioned berth
- Luang Prabang – Vientiane train, second class
- Private vehicle and driver for every land transfer in four countries
- Vietnamese, Lao, Thai and Khmer guides, each in their own country
- Border assistance at the Friendship Bridge with staff on both sides
- Three-day Angkor pass and all entrance fees named above
- Breakfast daily plus the meals named day by day
What it does not include
- International flights into Hanoi and out of Phnom Penh
- Visa fees for Vietnam, Laos, Thailand and Cambodia
- Travel insurance, which we require
- Drinks, laundry, and meals not named
- Tips for guides and drivers
Photographs
Who this trip is wrong for
- Anyone who cannot sleep on a train. Day 11 is a twelve-and-a-half-hour night on rails and there is no realistic alternative that keeps the crossing on the ground.
- Travellers who want beaches. There is no coast on this route at all, and adding one costs four days.
- Anyone hoping to include Myanmar. We do not run there and will not.
- Parties with children under about ten. Twenty-four days at this pace is a lot for adults and a great deal for children.
- Anyone travelling between late February and mid-April. Burning season affects northern Laos and northern Thailand at the same time, and Chiang Mai air quality in March is genuinely bad, not merely hazy.
- People who need the trip to be reversible. Run south to north, it needs a second flight, because Cambodia and Thailand are not connected on the ground in 2026.
Practical notes
Four visas, four systems
Vietnam is visa-free for 45 days for most European passports and an eVisa at USD 25 otherwise. Laos is an eVisa — valid here, because you fly in. Thailand is visa-exempt for 93 nationalities plus a free Digital Arrival Card at tdac.immigration.go.th, filed within 72 hours of arrival. Cambodia is an eVisa at USD 30 from evisa.gov.kh. Detail on visas and entry.
The Thai Digital Arrival Card catches people out
It is free, it is compulsory for every foreign national on every entry, and it can only be filed in the 72 hours before you arrive. Entering Thailand overland from Laos on day 11 counts. We remind you the day before; the fake sites that charge for it are the reason people get it wrong.
Book the Hanoi–Luang Prabang flight early
Thin route, few daily departures, and the fare roughly doubles inside four weeks. Everything else on this itinerary can be built at six to eight weeks.
Questions travellers ask most
Why fly Bangkok to Siem Reap instead of driving?
Because the road does not exist as an option in 2026. Every Thailand–Cambodia land crossing has been closed since late June 2025, including Poipet–Aranyaprathet, and there is no announced reopening date.
The flight is about an hour and returns most of a day compared with the old overland crossing, so the itinerary is arguably better for it. It is still a border we would rather cross on the ground.
Is the night train to Bangkok comfortable?
Second-class air-conditioned sleeper: two berths per bay, curtains, clean linen, a working dining car. It is comfortable in the way a good European sleeper is comfortable, not in the way a hotel is.
If you would rather not, we can fly Vientiane to Bangkok instead. It costs roughly the same and loses the best travel day of the trip.
Can I shorten this to twenty days?
Yes, and the honest cut is northern Thailand. Dropping Chiang Mai and Chiang Rai takes four days out without breaking the geography, because Bangkok is the flight hub anyway.
Cutting Laos instead saves the same time and costs the trip its best week. We will say so.
What is the worst day on this itinerary?
Day 18. Chiang Rai to Bangkok to Siem Reap is two flights and about eight hours door to door, and it exists only because a border is shut.
We schedule nothing that evening and we do not expect anything of you the next morning before 07:30.
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