Hoi An to Kampong Thom: Road Trip Guide & Best Stops

The drive from Hoi An to Kampong Thom spans the central Vietnamese coast, crosses the Truong Son Mountains, and enters Cambodia's flat landscapes. It is roughly 300 miles (480 km) via National Route 1A and Cambodia's National Road 6. The Annamite Range marks a significant geological and cultural transition between the two countries. A notable quirk: Vietnamese roads are marked in kilometers, but Cambodian signage often uses both kilometers and miles, so keep an eye out for the dual markers.

This article answers: how to find the best stops and hidden gems between cities. It compares costs, safety, and worthwhile detours. For a quick estimate, the journey takes 8–10 hours of driving, excluding border formalities and breaks.

The most efficient route leaves Hoi An south on National Route 1A, passing through Da Nang, then heads west on Route 9 at Dong Ha. This leads to the Lao Bao border crossing into Laos, then continues into Cambodia via the Densavan border gate. Fuel costs differ: in Vietnam, expect around 30,000 VND per liter (as of 2025), while Cambodian pricing (in riel) is roughly 4,500 riel per liter, but paying in US dollars is common. Budget $60–80 for fuel for the entire trip, depending on vehicle.

Road quality: Vietnamese sections are largely paved and well-maintained, particularly on 1A and 9. In Cambodia, National Road 6 is in decent condition, with some stretches under construction. Border crossing formalities typically take 30–60 minutes, so plan accordingly. Ensure your vehicle has proper international insurance and carry all required documents.

• Tolls: Vietnam charges tolls on some sections of 1A (about $5 total); Cambodia does not have highway tolls on this route.
• Currency exchange: Cambodia accepts US dollars widely, but riel is used for small purchases.
• GPS coordinates: Hoi An (15.8801°N, 108.3380°E), Kampong Thom (12.7090°N, 104.8885°E).

Driving in Vietnam and Cambodia requires alertness: motorbikes, livestock, and unpredictable road users are common. Always carry a first-aid kit and emergency water. For breaks, rest stops are available every 50–100 km, but they are basic; consider packing snacks. The Binh Dinh rest stop at the 200 km mark on 1A is recommended for clean facilities.

For families: both countries offer child-friendly stops. In Vietnam, the beach town of My Khe has a playground, and the Hue Royal Palace (UNESCO site) provides a cultural day out. In Cambodia, the Sambor Prei Kuk temple complex (also UNESCO) is an option, but it's a bit off the main road. For pets, this route is challenging: accommodation that accepts pets is rare, and border crossings require health certificates; plan for specific pet-friendly hotels near the border.

To manage fatigue, drive no more than 4 hours without a rest. The Lao Bao border area has a few simple guesthouses if you prefer to split the trip. Hidden gems: the Khe Sanh Combat Base museum and the Cha Lo pass offer stunning views and historical perspective. These are often overlooked by faster travelers.

The geography shifts from coastal plains to the densely forested Annamite Range, then flattens into the Cambodian lowlands. Along the way, you'll pass the Vinh Moc tunnels—a network of underground village during the Vietnam War—and the DMZ (Demilitarized Zone), which are not to be missed. In Cambodia, the Stung Sen River offers a scenic backdrop as you approach Kampong Thom.

Commerce flourishes at roadside markets in Laos and Cambodia, where you can buy fresh fruit, local handicrafts, and fish paste. In Vietnam, the market towns of Khe Sanh and Lao Bao offer typical Vietnamese food stalls. For a unique stop, consider the Bai Dinh Pagoda in Ninh Binh (not on the direct route, but a detour from Hanoi if you're on a longer trip). For a more manageable detour, visit the Phong Nha-Ke Bang National Park, a UNESCO site, which is a short drive from Route 9.