Driving from Samut Sakhon to Ha Tien: Road Trip Guide

Starting in the coastal province of Samut Sakhon, this route heads southwest through Thailand's narrow southern isthmus and into Cambodia, ending in the charming Vietnamese border town of Ha Tien. The drive covers roughly 700 kilometers (435 miles) and typically takes 10–12 hours, including border formalities and breaks.

A unique feature of this journey: you'll cross the Mekong Delta's vast network of rivers, where ferries are still a part of daily life. The route offers a fascinating contrast between Thailand's bustling shrimp farms and Vietnam's tranquil rice paddies.

The route passes near several remarkable natural areas. In Thailand, you'll skim the edge of the Khao Sam Roi Yot National Park, a limestone karst landscape south of Hua Hin. In Cambodia, the coastal road offers glimpses of the Gulf of Thailand, and just inland, the Bokor National Park (entry $5) has waterfall viewpoints.

Although not directly on the route, the great UNESCO World Heritage Sites of Angkor (in Siem Reap) and Hoi An (in Vietnam) are much farther afield. However, a detour to the Prasat Phnom Da temple complex near the Cambodian town of Kampot (a 90-minute side trip) offers a taste of ancient Khmer architecture without the crowds.

Local commerce along the way: Samut Sakhon is Thailand's shrimp capital, so expect roadside stalls selling fresh and dried seafood. In Cambodia, you'll encounter markets with tropical fruits like mangosteen and durian. Ha Tien itself is known for its pepper, seafood, and bustling riverside market.

For more ideas on uncovering hidden gems, check out this guide on how to find the best stops and hidden gems between cities.

Road quality varies: Thai highways are generally well-paved and signposted, but Cambodian secondary roads may have potholes and unlit sections. Drive during daylight hours to maximize safety.

For families, consider a stop at the Samut Sakhon Aquarium (entry 20 baht) before you leave, or at the Klong Wan beach near Prachuap Khiri Khan for a break during the drive. In Cambodia, the Bokor National Park has picnic areas that are kid-friendly.

Pets: Some hotels in Thailand and Vietnam are pet-friendly, but it's wise to check ahead. When crossing borders, a pet passport and rabies vaccination certificate is required.

To combat fatigue, plan a rest stop every two hours. Hotels in Trat (e.g., at the coastal town of Hat Mai Rut) offer affordable rooms (around 800–1,200 baht) if you prefer to split the drive. Another option is to overnight in Kampot, Cambodia, which has a range of guesthouses (USD $15–30).

From Samut Sakhon, take Highway 35 (Thonburi–Pak Tho) to Highway 4 (Phetkasem Road), then connect to Highway 3 (Sukhumvit) towards Trat province. The route into Cambodia uses National Highway 48, then the Cambodian National Road 33 to the Ha Tien border gate.

Fuel costs: Thailand and Cambodia both have petrol stations roughly every 30–50 km, but fuel is cheaper in Thailand (around 25–30 baht/liter for petrol) compared to Cambodia ($1.10–$1.20/liter).

• Border crossing: The Ban Hat Lek/Cham Yeam crossing, near Trat, is open daily from 07:00–22:00. You'll need a valid passport and vehicle documents (if driving a foreign-registered car).
• Papal permit: For foreign cars, you'll need a Carnet de Passage or a temporary import permit, obtainable at the border (approx. $50).
• Tolls: Thailand has no tolls on this route, but Cambodia has a few toll booths (approx. 1,000 riel or $0.25 each.