Lopburi to Long Xuyen: A Road Trip Guide (2025)

Starting in Lopburi, famous for its macaque monkeys that roam temple ruins, you'll head south on Route 1 (Phahonyothin Road) toward Bangkok, then follow Highway 4 (Phetkasem Road) through the Kra Isthmus. The route crosses into Cambodia at the Aranyaprathet–Poipet border, then traverses Cambodia on National Road 5, re-entering Vietnam near Ha Tien and continuing to Long Xuyen on the Hậu River. This approximately 1,400-km journey takes 24–28 hours of pure driving, typically split over three days.

The historical significance: this region was once part of the Khmer Empire, and the roads follow ancient trading paths. Today, it's a vital economic corridor connecting Thailand's central plains with Vietnam's Mekong Delta.

Border crossings: expect 1-2 hours at Aranyaprathet-Poipet, including visa formalities and vehicle paperwork. Cambodia requires a vehicle import permit (around $20) and insurance. Vietnam requires a temporary import permit, obtainable at Ha Tien border crossing.

Fuel costs: Thailand roughly $0.90/liter, Cambodia $1.10/liter, Vietnam $0.80/liter. Expect roughly 30 fill-ups for the journey. Toll roads in Thailand: Bangkok elevated highways cost about $5 total. Cambodia and Vietnam have minimal tolls.

• Thai highways: well-maintained, 4-lane divided.
• Cambodian roads: 2-lane, variable conditions, beware potholes.
• Vietnamese roads post-Ha Tien: newer asphalt, but narrow bridges and local traffic.

Is it worth driving Lopburi to Long Xuyen? For adventurous drivers who enjoy cross-border complexities, yes; for those seeking simple A-to-B travel, flying is easier. The drive takes 24-28 hours with border checks, versus a 3-hour flight plus transfers.

Road conditions vary dramatically: Thailand's highways are excellent, but Cambodia's National Road 5 is being upgraded in sections, with sudden unpaved patches. In Vietnam, watch for motorbikes and livestock on the road. Always carry a local SIM with data for GPS, and check border crossing hours (typically 6am-10pm).

Family and child suitability: While the journey is long, pit stops at Vietnamese cities like My Tho offer river cruises, and Cambodia's Sihanoukville (a detour) has beaches. In Long Xuyen, families enjoy the An Giang pottery village and floating fish farms. For children, the journey is best broken every 2 hours to avoid restlessness.

Pet-friendly framework: Many Thai hotels on the route accept pets, but Cambodian and Vietnamese accommodations are less accommodating. You may need to book pet-friendly hotels in Phnom Penh and Can Tho, and ensure you have vaccination certificates for border crossing. Some border checkpoints may require veterinary inspection.

Fatigue management: Drive only during daylight, and take regular breaks. Notable rest stops: Nakhon Sawan (Ba Sao), Poipet (casinos), Phnom Penh's Olympic Stadium area, and Can Tho's riverside promenade. Never drive at night due to unlit roads and reckless drivers. Consider overnight stays in Bangkok, Phnom Penh, and Can Tho or Chau Doc to split the drive.

Hidden off-route spots: Less-traveled Bat Chiem Lake (near Long Xuyen) is a serene melaleuca forest, and the Sam Mountain near Chau Doc offers cross-border views of Cambodia. For local commerce, visit Long Xuyen's overnight market, known for traditional bánh xèo (crispy pancakes).

Learn more about finding how to find the best stops and hidden gems between cities to enrich your journey.

Southeast Asia's monsoon climate dominates: dry season (Dec-Apr) with 30°C days, rainy season (May-Nov) with downpours and occasional flooding. During the rainy season, the route shifts from verdant rice paddies to flooded landscapes, especially in the Mekong Delta region.

Along the Thai stretch, you'll pass sugarcane fields and pineapple plantations near Lopburi, then coconut groves near Bang Kla. In Cambodia, rice paddies stretch to the horizon, with rural markets held at dawn. Vietnam's Mekong Delta is a maze of canals and floating markets, where commerce happens on water.

Notable natural attractions: Khao Yai National Park (from Lopburi detour, 3 hours), Phnom Srok's Cambodian countryside, and Tra Su Melaleuca Forest (a 1-hour drive from Long Xuyen). UNESCO sites along the way: historic Ayutthaya (if detouring from Bangkok), Preah Vihear temple (off-route, near Cambodia-Thailand border), and Hoi An (far off, not worth it). Best to visit Ayutthaya if you're interested in UNESCO heritage.