Chon Buri to Rach Gia Road Trip Guide

Crossing from Thailand's eastern seaboard to Vietnam's Mekong Delta, the drive from Chon Buri to Rach Gia covers roughly 1,000 kilometers and takes about 15 hours of pure driving time. The route traces the Gulf of Thailand, cuts through Cambodia, and finishes in a coastal province famous for its offshore islands.

This journey straddles two distinct climates: Thailand's tropical savanna and Vietnam's monsoon-influenced tropical zone. Expect high humidity year-round, with the heaviest rains from May to October, affecting road conditions and photo opportunities.

After leaving Chon Buri's industrial zone, you'll pass through Prachinburi's lush fruit orchards and sugar palm groves. Cambodia introduces lowland rice paddies and the Tonlé Sap floodplain, home to stilted villages and floating markets.

In Vietnam's Kien Giang province, Rach Gia is a gateway to Ha Tien and Phu Quoc, but the drive itself offers views of winding canals, shrimp farms, and salt fields. Local markets along the way sell tropical fruits and fresh seafood, ideal for picnic stops.

Traffic rules vary: Thailand drives on the left, Cambodia, and Vietnam on the right. Watch for motorbikes and livestock, especially in rural areas. Wear seatbelts, and avoid driving after dark due to limited lighting.

For families, note that rest areas in Cambodia often lack baby-changing facilities; bring supplies. Pet travel requires a rabies vaccination certificate and import permit—check regulations separately.

Plan rest breaks every 2-3 hours. Major stops include Aranyaprathet's bustling border market, Phnom Penh's riverside, and the Mekong Delta town of Long Xuyen. For a hidden gem, detour to Cambodia's Phnom Da Temple south of Phnom Penh.

Fueling stations are sparse in rural Cambodia, so fill up before leaving major cities. Pack water, snacks, and a first-aid kit. The journey offers how to find the best stops and hidden gems between cities.

Start on Thailand's Route 32, then merge onto Highway 344 toward Aranyaprathet. After crossing at the Poipet border, continue on Cambodia's National Road 5 to Phnom Penh, then switch to National Road 1 south to the Vietnamese border at Bavet. In Vietnam, follow National Route 80 to Rach Gia.

Border crossings require a valid passport and vehicle papers. Expect delays of 1-2 hours at each crossing; check current requirements before departure. Toll fees apply in Thailand and Vietnam, but Cambodia's roads are mostly toll-free.

• Fuel costs: ~2,000 THB in Thailand, ~$60 in Cambodia, ~1,200,000 VND in Vietnam
• Road quality: Paved highways in Thailand and Vietnam; Cambodia's NR5 is mostly good but potholed in sections