Chon Buri to My Tho: Essential Road Trip Guide

Chon Buri, Thailand's eastern seaboard, and My Tho, Vietnam's Mekong Delta gateway, are linked by a 700-kilometer route that crosses two countries. The journey typically takes 10-12 hours by car, including border crossings at Aranyaprathet-Poipet or Hat Lek-Cham Yeam. This guide covers the essential logistics, landscapes, and safety considerations for making the trip.

One notable historical fact: the road network between these cities follows old trade routes used during the Khmer Empire, connecting coastal trading posts with the Mekong's inland waterways. Today, modern highways like Thailand's Route 3 (Sukhumvit) and Vietnam's QL1A make the journey straightforward, but the real appeal lies in the varied experiences along the way.

The route demands planning, especially for fuel and tolls. In Thailand, petrol stations are plentiful along Route 3 and National Highway 33, with prices around 35 baht per liter (as of 2025). In Cambodia, fuel is cheaper (~4,200 riel per liter), but stations are sparser east of Phnom Penh. Vietnam's fuel prices hover around 25,000 VND per liter. Tolls in Thailand are minimal on national highways, but Cambodia's National Road 5 has several toll gates, and Vietnam's expressways charge moderate fees.

For border crossings, the Aranyaprathet-Poipet crossing is busiest but has a new Thai control post; the Hat Lek-Cham Yeam crossing is quieter but less developed. Ensure your vehicle has a Carnet de Passage for Cambodia and Vietnam, and obtain a Vietnamese visa in advance.

• Thai border with Cambodia: Aranyaprathet (6 AM-10 PM) and Hat Lek (6 AM-10 PM)
• Cambodian border with Vietnam: Bavet (Krong Bavet) and Phnom Den (Tinh Bien)
• Road conditions: Thai highways are well-paved; Cambodian National Road 5 is mostly smooth but narrow; Vietnamese QL1A is good with some construction zones.
• Speed limits: Thailand 90 km/h (highway), Cambodia 80 km/h, Vietnam 80-90 km/h.

Safety varies by country. Thailand has some of Asia's best road infrastructure, but Cambodian roads can have potholes and unpredictable traffic. Always wear seatbelts, and in Cambodia, avoid nighttime driving due to poor lighting and livestock on roads. Vietnam's highways are safer but have many motorcycles and unexpected vehicles.

For family suitability, the route offers plenty of attractions: in Thailand, the Khao Kheow Open Zoo (open-air) and Sea Life Aquarium in Chon Buri; in Cambodia, the Cambodia Cultural Village in Siem Reap (if detoured) or the Children's Museum in Phnom Penh; in Vietnam, the Vinh Trang Pagoda in My Tho and boat rides on the Mekong are kid-friendly.

Pet-friendly framework: Hotels along the route are increasingly pet-friendly, but check in advance. In Thailand, many resorts welcome pets; in Cambodia and Vietnam, smaller guesthouses may not. Carry pet documentation for border crossings, and note that some temples restrict pets.

Fatigue management: Plan rests every 2-3 hours. Recommended rest zones include the PTT station at Laem Chabang (Chon Buri), the Sokimex gas station near Sisophon, the Mekong Star Resort in Phnom Penh, and the Moc Bai border gate area. Also, consider a night in Phnom Penh to split the drive.

Culinary infrastructure: Thai roadside restaurants offer som tam and grilled chicken; in Cambodia, try lok lak and amok at markets; in Vietnam, pho and banh mi are ubiquitous. Many places have clean restrooms.

Leaving Chon Buri, you traverse Thailand's eastern coast, with Khao Kheow Open Zoo and Nong Nooch Tropical Garden as notable green stops. Near Aranyaprathet, the countryside turns to flat farmland, a prelude to Cambodia's vast rice paddies. In Cambodia, the large Tonle Sap Lake and its floating villages offer a unique ecosystem visit, though it's slightly off the direct route. Farther south, the Mekong River's many distributaries create a maze of waterways and islands near the Vietnamese border.

For UNESCO World Heritage Sites, the route is close to Angkor Wat (Siem Reap, ~300 km north of Phnom Penh) and the Temple of Preah Vihear (near the Thai border), but neither is en route. However, the Phnom Penh area has the royal palace and killing fields, which are somber historical sites. In Vietnam, the Mekong Delta's floating markets and orchards are cultural highlights, not UNESCO-listed but valuable.

Local commerce thrives at roadside markets, especially in Cambodia's Sisophon and Phnom Penh's suburbs, selling crafts and tropical fruit. The how to find the best stops and hidden gems between cities approach suggests deviating from main roads to discover these.

Hidden off-route spots include Thailand's Wat Khao Sukim (a mountain temple with views) and Cambodia's Phnom Chisor temple, not on major maps but worth a detour.