Siem Reap to Long Xuyen: A Detailed Road Trip Guide

The drive from Siem Reap to Long Xuyen spans roughly 700 km and crosses the Cambodian–Vietnamese border near Tinh Bien. The journey typically takes 10–12 hours depending on border formalities and stops, making it a feasible one-day drive, though many travelers split it over two days. This route passes through the Tonlé Sap floodplains and the Mekong Delta, offering a transition from Cambodia's ancient temples to Vietnam's lush riverscape.

Notably, the road between Phnom Penh and the border at Tinh Bien is part of National Highway 1 (QL1) in Cambodia and continues as National Route 91 in Vietnam. At the border, the Vinh Xuong crossing is less busy than the nearby Xa Mat crossing, and it's open from 7:00 to 17:00 both countries. Be prepared for occasional ferry crossings over the Mekong's tributaries if you choose a more scenic route.

Leaving Siem Reap, you'll pass through the Sangkae River area, and after about 30 km, the landscape opens into rice paddies dotted with sugar palm trees. The Tonlé Sap Biosphere Reserve, a UNESCO-designated site, stretches along the route's early part; it's notable for its floating villages, which are not easily accessible from Highway 6, but a detour to Kampong Phluk offers a glimpse. As you approach Phnom Penh, the Mekong's confluence at Chruoy Changvar is a scenic stop.

In Vietnam, after the border, the geography shifts to the Mekong Delta's intricate canal network. The Tịnh Biên market, just 5 km inside Vietnam, is a bustling commerce hub where you can sample local produce and traditional Khmer-influenced dishes. Further south, near Long Xuyen, the Dong Thap Muoi (Plain of Reeds) is a wetland area known for its bird sanctuaries, such as Tram Chim National Park, which is a UNESCO Ramsar site. What is it worth driving Siem Reap to Long Xuyen? For those interested in authentic delta life, this route offers access to many canal-side villages.

Local commerce along the route includes small family-run fuel stations and food stalls, especially near the border. Try the Banh Xeo (crispy pancake) in Chau Doc, which is just 50 km from Long Xuyen. For a deeper understanding of regional culture, consider the historical site of the Ba Chuc massacre, located 30 km west of Long Xuyen, a poignant reminder of the Khmer Rouge era.

Fuel costs are comparable on both sides, but expect cheaper fuel in Vietnam; as of mid-2025, petrol is around 25,000 VND/liter (approx. $1.05) in Vietnam, while in Cambodia it's about 4,300 KHR/liter (approx. $1.05). There are adequate fuel stops along National Highway 1, especially near Phnom Penh and Neak Loeung. The ride is how to find the best stops and hidden gems between cities; keep an eye out for signed exits to small towns.

Driving times can vary: The expressway from Phnom Penh to Bavet is in good condition, while some segments near the border require cautious navigation through local traffic. For those asking how long to drive Siem Reap to Long Xuyen, the total is about 10–12 hours, but plan for additional time at the border. Vehicle insurance and permits must be obtained in advance; Cambodia requires a valid driver's license and vehicle registration, and Vietnam allows foreign vehicles only with a local guide or a carnet.

• Border crossing at Vinh Xuong/Tinh Bien is open 7:00–17:00. Allow 30–60 minutes for exit and entry formalities.
• Road tolls within Cambodia: a few small payments near Phnom Penh. Vietnam does not impose tolls on the segment to Long Xuyen.
• Weather conditions: The dry season (Nov–Apr) offers manageable roads, while rainy season (May–Oct) may cause delays on unpaved sections.

Road quality is generally good on main highways, but watch for potholes near village areas and on secondary roads. In Cambodia, be cautious of motorbikes and livestock crossing; in Vietnam, the traffic is denser and lane discipline varies. Always use headlights and honk on blind corners. The route has a few rest stops with gas stations and basic amenities; plan to stop every two hours to avoid fatigue.

For families, the journey is suitable if you plan breaks. At Phnom Penh's Aeon Mall (near the highway), children can stretch, and international restaurants are available. Pet-friendly travel is possible, but note that Cambodia has a higher risk of rabies; ensure pets have up-to-date vaccinations. Cross-border pet entry into Vietnam requires a health certificate and quarantine; check with the Vietnamese embassy beforehand.

Some things to do between Siem Reap and Long Xuyen include a visit to the Koh Ker temple complex, a UNESCO World Heritage Site (2017), which is a 2-hour detour off the main route, but only recommended if time permits. Alternatively, at Kompong Kdei, you can see the ancient Kampong Kdei bridge, a laterite structure from the Angkor period. For rest, Skun, known as the “spider town,” offers an exotic food experience, though it's a 60-km east detour. Otherwise, the town of Neak Loeung is a busy river crossing point with simple food stalls.

To manage fatigue, the best strategy is to overnight in Phnom Penh, which breaks the journey into two ~5-hour drives. There are numerous guesthouses in Phnom Penh, but book in advance during peak season. The last stretch to Long Xuyen is straightforward, and arriving in Long Xuyen can be enjoyable if you time your departure to avoid sunset traffic.