Kampot to Sa Dec Road Trip: A Detailed Driving Guide

As you depart Kampot, you’ll follow National Road 3 eastward, passing through the coastal province of Kep before turning north onto National Road 33 at the town of Kampong Trach. This route eventually connects to the Cambodian-Vietnamese border at Prek Chak, where you’ll enter Vietnam’s Kien Giang Province via the Ha Tien border gate. The total distance is about 150 miles (240 kilometers), yet the driving time can stretch from 6 to 8 hours due to border formalities and localized traffic.

Remarkably, this drive mirrors the historic waterways of the Mekong Delta: the same land that once served as a bustling channel for Khmer and Vietnamese traders now carries concrete roads that link centuries-old market towns and floating villages. Early in the journey, you’ll notice the Elephant Mountains receding in your rearview mirror; ahead lies the flat, fertile expanse of the delta, drastically different in scenery and pace.

Below, find a quick reference table for the journey’s key logistics.

Of the route, the Cambodian section from Kampot to the border is the most straightforward: National Road 3 to National Road 33 is paved and well-marked, with speed limits of 80 km/h on open stretches. After crossing into Vietnam at Ha Tien, you’ll follow National Highway 80 towards Hon Dat, then QL30 to Chau Doc, and finally QL54 to Cao Lanh and then QL80 into Sa Dec. These Vietnamese roads are generally in good condition, but expect delayed traffic through Chau Doc and Cao Lanh’s urban centers.

Fuel availability is convenient: along both national routes, service stations appear approximately every 50 km, particularly in Cambodian and Vietnamese towns. As of early 2025, gasoline prices hover around 22,500 riel per liter in Cambodia and 23,100 VND in Vietnam; budget accordingly for the 240-km drive, which typically consumes roughly 20 liters for a mid-size car.

Two border crossings along the route are open for international travel: the Prek Chak / Ha Tien crossing is the primary one, with hours from 7 AM to 6 PM local time. A secondary crossing at Phnom Den, farther north, is less crowded but adds 50 km to the drive. To minimize delays, carry your passport and vehicle registration, and expect to pay a road toll of about 50,000 VND for the My Thuan bridge near Sa Dec, a cable-stayed bridge over the Tien River.

• Vehicle insurance: not required for entering Vietnam, but recommended for trailering and accidents.
• Driving side: Cambodia drives on the right; Vietnam also drives on the right, but beware of motorbikes weaving.
• Mobile connectivity: purchase a local SIM for GPS apps, as some rural stretches lack public Wi-Fi.

The road infrastructure is safe for drivers accustomed to developing-country roads; however, be vigilant for sudden speed bumps in villages and livestock crossings. Trucks and buses dominate the right lane, so overtaking requires patience. Wearing seatbelts is mandatory and enforced at police checkpoints.

When traveling with children, good rest stops are crucial. Consider a break at the Kampong Trach cave complex (43 km from Kampot), where kids can explore the Buddhist grottoes—a memorable educational stop. In Vietnam, the Long Xuyen Night Market (110 km from Sa Dec) is a safe, family-friendly evening destination with food stalls and children’s rides, but if you prefer an outdoor stop, the Suoi Tien Ecological Area near Cao Lanh offers a swimming pool and water park.

For fatigue management, plan to pull over every 2 hours; several rest areas along the route offer cheap coffee and snack stalls. In Cambodia, the Prek Chak border area has a service station with clean restrooms; in Vietnam, the petrol stations along QL30 often include a small restaurant. For hidden off-route spots, escape to the Tinh Bien floating village, accessible by a side road from QL91 near Chau Doc—a serene community of floating houses and fish farms. The distance from the main route is 12 km, yet it reveals a way of life preserved for centuries.

For more tips on discovering these hidden gems, how to find the best stops and hidden gems between cities is a useful read.

Highway 3 from Kampot to Kampong Trach presents a diverse landscape of salt flats and durian orchards, which are at their zenith during the June-August harvest. As you approach the border, mangrove forests line the waterways near Ha Tien, signaling the transition from the uplands to the marshy delta. Once in Vietnam, the scenery shifts to a patchwork of emerald rice paddies and silvery fish ponds, broken by the distinctive limestone karsts of Ha Tien’s coast—a geological feature that continues inland to the Sam Mountain near Chau Doc.

This route is not designated as a UNESCO World Heritage Site, but one of its major waypoints is: the My Son Sanctuary, near Tra My, lies 110 km southeast of Sa Dec and is easily accessible for a detour. The sanctuary is a cluster of ruined Hindu temples dating from the 4th to 14th centuries. The drive passes through the vibrant of local commerce: at the border town of Ha Tien, you’ll encounter the morning fish market, while in Chau Doc, the Chau Phu Temple Kite Festival occurs on the 15th of the first lunar month.

For nature lovers, the Tram Chim National Park (50 km from Sa Dec) offers guided birdwatching tours; it is one of Vietnam’s top spots for the endangered red-crowned crane.