Vietnam to Cambodia Overland: Full Guide

With Cambodia’s land borders with Thailand still closed to travellers in 2026, Vietnam is now the overland gateway into the kingdom — and happily, it’s also the easiest. Three well-worn routes cross the frontier: a comfortable six-hour bus, a half-day boat up the Mekong, and a sleepy coastal crossing for anyone coming off Phu Quoc. Here’s how each works, visas included.

The Short Answer

Most travellers should take the direct Ho Chi Minh City → Phnom Penh bus ($21–35, about 6–7 hours door to door including the border). If you’re already in the Mekong Delta — or you just like the idea of arriving in a capital city by river — the Chau Doc speedboat is the romantic option for a little more money. Get your Cambodian visa sorted before or at the border for a flat $30, and carry clean US dollar bills.

Route 1: Ho Chi Minh City to Phnom Penh by Bus

The workhorse route runs up Vietnam’s Highway 1A to the Moc Bai / Bavet crossing, then along Cambodia’s National Road 1 into Phnom Penh — around 230 km and 6–7 hours in total.

• Operators: Giant Ibis and Mekong Express run the classic full-size coaches; Vietnamese “limousine” companies (Khai Nam, MEKO and others) run faster premium vans. Expect $21–35 depending on comfort level, with several departures each morning.
• At the border: everyone gets off twice — once for the Vietnamese exit stamp, once on the Cambodian side. Bus crews shepherd the whole coach through as a group and can handle visa-on-arrival paperwork for a small service fee (about $5) if you’d rather not queue yourself. All told, budget 45–90 minutes.
• Visa note: Bavet is an official e-visa entry point, so this is the one land route where arranging the $30 e-visa in advance at evisa.gov.kh works — otherwise the $30 visa on arrival is straightforward here.

Arriving in Phnom Penh, buses drop centrally — you’re a short tuk-tuk from the riverside, and well placed for 48 hours in the capital.

Route 2: The Mekong Speedboat via Chau Doc

The scenic one. From the Delta town of Chau Doc, scheduled fast boats run down the Mekong and cross the river border at Vinh Xuong / Kaam Samnor, arriving at Phnom Penh’s riverside dock — roughly 4.5–5 hours on the water, departing around 7:00–7:30am, from about $35 with the established operators (premium boats cost more).

This crossing can only be done on the scheduled boats — no independent crossing — and the crews handle the border formalities while you wait on deck, which makes it one of the smoothest frontier experiences in Asia. The e-visa is not accepted at this river checkpoint, so you’ll take the $30 visa on arrival; the crew collects passports, fees and a photo and returns everything stamped.

Two practical notes: it’s the slowest way to cover the distance, and the best seats (upper deck, shade, river breeze) go early. Treat it as a Mekong cruise that happens to end in a new country.

Route 3: Ha Tien to Kep and Kampot (the Coastal Back Door)

Coming off Phu Quoc island, ferries land at Ha Tien, from which it’s a short hop to the quiet Prek Chak crossing and onward by minivan to Kep’s crab shacks and Kampot’s river town — usually under two hours of actual travel, plus border time. It’s the least trafficked of the three routes: bring patience, small dollar bills, and take the $30 visa on arrival (no e-visa here either). For beach-to-beach itineraries — Phu Quoc straight onto Cambodia’s south coast and islands — it saves an enormous backtrack through Saigon.

Paperwork, in One Place

• Cambodian tourist visa: $30 flat — same price as e-visa or on arrival since January 2025. No “processing fee” on top is legitimate; polite firmness at quieter land borders goes a long way. Full details in the Cambodia visa guide.
• e-visa (evisa.gov.kh) is only valid at certain checkpoints — of these three routes, Bavet only.
• The e-Arrival card is currently required for air arrivals, not land or river crossings — but rules evolve, so glance at arrival.gov.kh before you travel.
• Money: bring clean, undamaged USD for visas and first expenses — Cambodia is fussy about note condition, and here’s how the dollar-riel system works once you’re in.
• Going the other way (Cambodia → Vietnam): most nationalities need a Vietnam e-visa arranged in advance, issued for a named border gate — make sure it matches your actual crossing.

Once you’re across: the first-time Cambodia guide covers SIMs, cash and onward transport in one checklist.