Sihanoukville to Kampong Cham: Road Trip Guide

The journey from Sihanoukville to Kampong Cham covers approximately 330 kilometers (205 miles) via National Road 4, National Road 1, and National Road 7. This route slices through the heart of Cambodia, transitioning from the coastal region to the Mekong River basin. The drive typically takes about 6 to 7 hours, depending on traffic and road conditions.

National Road 4 is a major highway linking Sihanoukville to Phnom Penh, well-paved and generally in good condition. From Phnom Penh, National Road 1 leads eastward, crossing the Mekong River via the Kizuna Bridge (completed in 2001 with Japanese funding) to connect with National Road 7 to Kampong Cham. The road conditions are mostly smooth, but expect heavy truck traffic on NR4 and occasional congestion in Phnom Penh.

• Driving time: 6-7 hours total, including rest stops.
• No tolls on these national roads.
• Fuel stations are abundant in cities and towns, but sparse in rural stretches.

For fuel, unleaded gasoline is widely available at around 4,200 riel per liter (as of 2025). Many stations accept US dollars, which are commonly used in Cambodia. Cash is easily accessible via ATMs in larger towns, but small vendors may not accept credit cards.

The landscape shifts from the coastal plains of Sihanoukville through the agricultural heartland to the Mekong River. Near Sihanoukville, you'll find tropical forests and fishing villages. Further inland, rice paddies dominate the scenery. Around Skun, you'll encounter a bustling market famous for its fried spiders, a local delicacy.

The route passes near several significant cultural sites. While no UNESCO World Heritage Sites lie directly on the route, you can detour to the Preah Vihear temple (a UNESCO site) from Kampong Cham, though it's a 300-km side trip. Locally, the Wat Nokor Bachey temple in Kampong Cham, built in the 15th century, is a must-see.

Vendors line the roads, selling fresh fruits, snacks, and handicrafts. The town of Neak Loeung, on the banks of the Mekong, offers a lively riverfront market where you can sample river fish dishes and buy traditional woven textiles.

The route is generally safe, but exercise caution: overtaking on narrow sections can be risky, and pedestrians and livestock often share the road. Use your headlights during the day for visibility. For families, consider a stop at the Phnom Penh Safari Amusement Park, a theme park in Phnom Penh, though it adds time. The area around Kampong Cham has picnic spots along the Mekong riverbank.

Culinary infrastructure: Restaurants and street-food stalls are plentiful in towns like Sihanoukville, Kampot, and Phnom Penh. During breaks, you can find Cambodian noodles, grilled meats, and fresh fruit shakes. For food safety, stick to busy places and avoid fresh salads.

Drivers are allowed to bring pets if they are secured in the vehicle. Keep in mind that not all hotels in Kampong Cham are pet-friendly, so check in advance. For fatigue management, take breaks every 2 hours. Rest stops with clean restrooms are found at some gas stations, especially around the halfway point near Phnom Penh.

For exploring the best stops Sihanoukville to Kampong Cham, consider a detour to the Prek Leap area near Phnom Penh for traditional Khmer architecture, or the Kien Svay district with its stilted houses and riverside restaurants. To uncover hidden off-route spots, use the how to find the best stops and hidden gems between cities guide. However, is it worth driving Sihanoukville to Kampong Cham? Yes, if you enjoy witnessing Cambodia's transformation and want to see rural life away from the tourist trail. For how long to drive Sihanoukville to Kampong Cham, plan for at least 6 hours, but allow extra time for stops. Things to do between Sihanoukville and Kampong Cham include visiting the Kampong Tralach Trek, a heritage trail on the outskirts of Kampong Cham, or cycling the bamboo bridge that appears during the dry season.