From Chau Doc, in the far west of the Mekong Delta, boats run up the river to Phnom Penh. It is one of the more pleasant ways to leave Vietnam, and it turns a transfer into part of the trip. It also has a documentation requirement that catches people out.
The visa requirement
This is the part to get right before anything else. A Vietnamese e-visa names the port of entry and exit you selected when you applied, and a land or river border is not the same as an airport. If your visa does not name the crossing you intend to use, you have a problem at the border rather than a formality.
Check the crossing the boat uses against the gate you intend to name, and do that before you apply rather than after. An e-visa cannot be renewed or extended from inside Vietnam, and changing it means leaving and applying again from outside — so this is a thing to get right at the application stage, not on the day.
If you intend to come back
Leaving Vietnam for Cambodia does not by itself create a problem. Returning does: a single-entry visa is spent once you leave. If the plan is Vietnam, then Cambodia, then Vietnam again, you need either a valid multiple-entry visa covering the return, or a second visa approved before you come back — applied for from outside Vietnam, and naming the gate you will re-enter through. An application in progress is not permission to enter.
What the journey is
Operators run boats from Chau Doc up the Bassac and Mekong to Phnom Penh, with the border formalities handled at a riverside post on the way. The crossing takes most of a day. Faster speedboat services and slower, more comfortable river cruises both exist, and the price range between them is wide.
The scenery is river life rather than spectacle — stilt houses, fish farms, cargo barges, floating villages. It is a slow day and it is the point of taking the boat rather than the bus.
Getting to Chau Doc
Chau Doc is in An Giang province near the Cambodian border, around six hours from Ho Chi Minh City by bus and less by private car. Most people arrive the day before and stay the night, because the boats leave in the morning.
It can also be reached from Can Tho in a few hours, which makes a natural sequence: Ho Chi Minh City, Can Tho for the floating market, Chau Doc, then the boat to Cambodia.
Chau Doc itself
Worth the evening you will spend there. Sam Mountain outside the town has temples and a view over the floodplain into Cambodia. There is a large floating fish-farm community on the river, and a market that reflects the Khmer and Cham populations of the province as much as the Vietnamese.
Booking the boat
Tickets are sold by the operators and through hotels and agencies in Chau Doc and Can Tho, usually a day or two ahead. Confirm three things when you book: which border post the boat uses, whether the Cambodian visa is arranged on arrival at the post or must be obtained in advance, and what time the boat actually departs.
Carry passport photographs and small US dollar notes. Cambodian e-visa and visa-on-arrival rules are set by Cambodia and change independently of anything on the Vietnamese side, so check them with the Cambodian authorities rather than with the boat operator.
What to expect at the post
The boat stops at the Vietnamese post for exit formalities and again on the Cambodian side for entry. Passengers disembark, queue, and wait for the boat to be cleared. It is unhurried rather than difficult, and the operator's staff walk the group through it.
Have everything to hand before you arrive: passport, the printed e-visa, the Cambodian documentation, photographs and cash. Fishing a passport out of a packed bag at the window is how a straightforward crossing becomes a slow one for everybody.
Which direction the boat runs
The same route operates in reverse, Phnom Penh down to Chau Doc, and that direction has the same visa logic with the sides swapped: your Vietnamese e-visa must name the river crossing as its port of entry, not an airport. Arriving by boat on a visa issued for Tan Son Nhat is the version of this problem that strands people furthest from help.
The alternatives
Flying from Ho Chi Minh City to Phnom Penh takes about an hour in the air, plus the airports at each end. Buses run the direct road route from Ho Chi Minh City through the Moc Bai crossing in six to seven hours. Both of those start from Ho Chi Minh City; the boat starts from Chau Doc, six hours further west, so compare the whole journey from wherever you actually are rather than the legs.
The boat is the slowest and the most interesting of the three. If the journey is dead time to you, fly. If a day on the Mekong sounds like part of the holiday, take the boat.
On the day
Expect the border formalities to take a while and to involve waiting on the boat and at the post. Have your passport, your Vietnamese visa details and your Cambodian documentation accessible rather than packed. Bring water and something to eat; the stops are not catered.
Whether to run Vietnam north to south or south to north in the first place is a question Vietnam, End to End works through.
FAQ
Does a Vietnamese e-visa cover the Chau Doc border crossing?
This is the part to get right before anything else. A Vietnamese e-visa names the port of entry and exit you selected when you applied, and a land or river border is not the same as an airport. If your visa does not name the crossing you intend to use, you have a problem at the border rather than a formality.
What is the boat journey from Chau Doc to Phnom Penh like?
Operators run boats from Chau Doc up the Bassac and Mekong to Phnom Penh, with the border formalities handled at a riverside post on the way. The crossing takes most of a day. Faster speedboat services and slower, more comfortable river cruises both exist, and the price range between them is wide.
How do you get to Chau Doc?
Chau Doc is in An Giang province near the Cambodian border, around six hours from Ho Chi Minh City by bus and less by private car. Most people arrive the day before and stay the night, because the boats leave in the morning.
